Physics Multiple Choice
STT 16.7 These speakers emit identical sound waves with a wave length of 1.0 m. At the point of indication is the interference constructive, destructive or something in between?
Constructive
1.27 A rectangle has a length of 3.24 M and height of .532 m. To the correct number of sig figs is the area? A 1.72 M B 1.723 M C D
A
2.22 Chris is holding two softballs while standing on a balcony. She throws ball 1 straight up in the air and, at the same instant, releases her grip on ball 2, letting it drop over the side of the building. Which velocity graph in figure Q 2.22 best represents the motion of the two balls?
A
STT 12.5 In figure 12.22 by comparing the slope of the graph during the time of liquid water is warming to the slope as steam is warming, we can say that A the specific heat of water is larger than that of steam B the specific heat of water is smaller than that of steam C The specific heat of water is equal to that of steam D the slope of the graph is not related to the specific heat
A the specific heat of water is larger than that of steam
12.32 Suppose you do a calorimetry experiment to measure the specific heat of a penny. You take a number of pennies, measure their mass, heat them to a known temperature, and then drop them into a container of water at a known temperature. You then deduce the specific heat of a penny by measuring the temperature change of water. unfortunately you didn't realize that you dropped one penny on the floor while transferring them to the water. This will- A. Cause you to underestimate the specific heat. B> Cause you to overestimate the specific heat C. Not affect your calculation of specific heat
A. Cause you to underestimate the specific heat.
16.22 A student in her physics lab measures the standing- wave modes of a tube. The lowest frequency that makes a resonance is 20 HZ. As the frequency is increased, the next resonance is at 60 HZ. What will the next resonance be after this? A 80 hz B 100 hz C 120 hz D 180 hz
B 100 hz
1.25 A woman walks briskly at 2.0 m/s how much wile will it take her to walk one mile? A 8.3 min B 13.4 min C 21.7 min D 30.0 Min
B 13.4 Min
STT 15.6 a plane wave, a circular wave and a spherical wave all have the same intensity. Each of the waves travel the same distance. Afterward, which wave has the highest intensity? A the plane wave B the circular wave C The spherical wave
A the plane wave
1.23 Wedell seals make holes in sea ice so they an swim down to forage on the ocean floor below. Measurements for one seal showed that it dived straight down from such an opening reaching a depth of .30 km in a time of 5.0 minutes. What was the speed of the diving seal? A .60 M/S B 1.0 M/S C 1.6 M/S D 6.0 M/S E 10 M/S
B 1.0 M/S
1.18 A student walks 1.0 mi west and then 1.0 mile north, after ward how far is she from her starting point? A 1.0 mi B 1.4 mi C 1.6 mi D 2.0 Mi
B 1.4 miles
2.15 Figure Q 2.15 shows the position graph of a car traveling on a straight road. At which labeled instant is the speed of the car the greatest?
C
2.17 Figure Q 2.17 shows an object's position-versus-time graph. What is the velocity off the object at T=6s?
C
STT 1 What is the length of the hypotenuse of this triangle? ( 6 and 8 cm) A 6 cm b 8 cm C 10 cm D 12 cm E 14 cm
C 10 cm
STT 1.4 Jane starts from her house to take a stroll in her neighborhood. After walking for 2 hours at a steady pace, she has walked 4 miles and is 2 miles from home. For this time, what was her speed? A 4 mph B 3 mph c 2 mph D 1mph
C 2 mph
11.36 A refrigerator freezer compartment is set at -10C; the kitchen is 24C. what is the theoretical minimum amount of electric energy necessary to pump 1.0 J of energy of the freezer compartment? A. .89 J B. .87 J C. .13 J D. .11 J
C. .13 J
2.16 Figure 2.16 shows the position graph of a car traveling on a straight road. The velocity at instant 1 is ___ and the velocity at instant 2 is ____.
D
STT 2.1 Which position vs. time graph best describes the motion diagram to the left?
D
STT 2.6 A cyclist is at rest at a traffic light. When the light turns green, has begins accelerating at 1.2 m/S^2. How many seconds after the light turns green does he reach his cruising speed of 6.0 M/S^2? A 1.0 S B 2.0 S C 3.0 S D 4.0 S E 5.0 S
E 5.0 S
STT 5.8 All three 50 kg blocks are at rest. Is the tension in rope 2 greater than, less than or equal to the tension on rope 1?
PIC
STT 15.1 Spectators at a sporting event do the wave as shown in the photo on the preceding page. Is this a transverse of a longitudinal wave?
Transverse
STT 14.4 the figures show four identical oscillators at different points in their motion. Which i moving fastest at the time shown?
a
STT 12.3 What is the ratio of TF/TI for this process? a 1/4 b 1/2 c a ( no change) D 2 e 4 f there is not enough information to decide
b 1/2
STT chapter 11 beginning Christina throws a javelin in to the air. As she propel it forward from rest, she does 270 J of work on it. at its highest point, its gravitational potential energy has increased by 70 J. What is the javelines kinetic energy at this point? A 270 j B 240 J c 200 j d -200 j e -340 j
c 200 j
STT 12.8 Suppose you are an astronaut in the vacuum of space, hard at work in your sealed spacesuit. The only way that you an transfer heat to the environment is by a conduction b convection c radiation d evaporation
c radiation
STT 16.1 Two pulses on a string approach each other at speeds of 1 m/s . What is the shape of the string at t=6s?
C
STT 16.4 A standing wave on a string is shown. Which of the models below has twice the frequency of the original wave?
C
15.21 What is the frequency of blue light with a ave length of 400 nm ? A 1.33 X10^3 hz B 7.50 X 10^12 HZ C 1.33 X 10^13 Hz D 7.50 X 10^14 Hz
D 7.50 X 10^14 Hz
STT 14.2 A ball is jung from a rope, making a pendulum. when it is pulled to 5 degrees to the side, the restoring force is 1.0 N. what will be the magnitude of the restoring force if the ball is pulled 10 degrees to the side? A .5 n B 1.0 n C 1.5 n D 2.0 N
D The restoring force is proportional to the displacement.
15.25 you stand at X=o m listening to a sound that is emitted at frequency Fs. The figure shows the frequency you hear during a four-second interval.which of the following describes the motion of the second source? A it moves from left to right and passes you at t=2s B it moves from right to left and passes you at t=2s C it moves toward you but doesn't reach you. It then reverses direction at t=2s D it moves away from you until t=2s it then reverses direction and moves toward you, but doesn't reach you.
D it moves away from you until t=2s it then reverses direction and moves toward you, but doesn't reach you.
STT 11.6 Which of the following changes would allow your refrigerator to use less energy to run? A Increasing the temperature inside the fridge B increasing the temp of the kitchen C decreasing the tmp inside the fridge D decreasing the temp of the kitchen
A ,D A Increasing the temperature inside the fridge D decreasing the temp of the kitchen
STT 14 beginning of the chapter A hanging spring has a length of 10 cm. A 100 g mass is hung from the spring, stretching it to 12 cm. What will be the length of the spring if this mass is replaced by a 200 g mass? a 14 cm B 16 cm C 20 cm d 24 cm
A 14 cm
16.23 An organ pipe is tuned to exactly 384 hz when the temperature of the room is 20 Degrees Celsius. Later, when the air has warmed up to 25 degrees Celsius, the frequency is A greater than 384 B 384 hz C less than 384 hz
A greater than 384
STT 12.1 Which of the system contains more atoms- 5 mol of helium( a=4) or 1 mol of neon? (A=20?) A helium B neon C they have the same number of atoms
A helium
STT 12.4 An aluminum ring is tight around a solid iron rod, if we want to loosen the ring to remove it from around the rod, we should A increase the temp of the ring and the rod B decrease the temp of the ring and the rod
A increase the temp of the ring and the rod
14.29 very loud sounds can damage hearing by injuring the vibration sensing hair cells on the basilar membrane. suppose a person has injured hair cells on a segment of the basilar membrane close to the stapes. what type of found is most likely to have produced this particular pattern of damage? A loud music with a mix of different frequencies B very loud, high-frequency sound C very loud, low-frequency sound
A loud music with a mix of different frequencies
14.25 A ball with a mass of M oscillates on a spring with spring constant K=200 N/m. The ball's position is x=(0.350 m) cos(15.0t) with T measured in seconds A) What is the amplitude of the ball's motion? A .175 m B .350 m c .700 m d 7.50 m E 15.0 m B) What is the frequency of the ball's motion? A .35 hz B 2.39 hz c 5.44 hz d 6.28 hz E 15.0 hz C) what is the value of mass m? A .45 kg b .89 kg c 1.54 kg d 3.76 kg E 6.33 kg D what is the total mechanic energy of the oscillator? a 1.65 J B 3.28 J C 6.73 J D 10.1 j E 12.2 J E What is the balls maximum speed? A .35 m/s B 1.76 m/s C 2.60 m/s D 3.88 m/s E 5.35 m/s
B,B,B,E,E
STT 1.1 Which car is going faster? A or B? Assume they are equal intervals of time in between both videos
B
STT 15.4 Three waves travel to the right with the same speed. which wave has the highest frequency? all three graphs have the same horizontal scale
B
14.23 A spring has an unstretched length of 20cm. A 100 g mass hanging from the spring stretches it to an equillibrium length of 30 cm. What is the amplitude of the oscillation? A. 5.0 Cm B. 10 CM C. 20 CM D 40 CM For the data, what is the frequency of the oscillation? A .10 Hz B .62 HZ C. 1.6 HZ D. 10Hz 2C Suppose this experiment were done on the moon, where the free fall acceleration is approx. 1/16 of that on the earth. How would this change the frequency of the oscillation? A. The frequency would decrease B. The frequency would increase C. The frequency would stay the same.
B. 10 CM C. 1.6 HZ C. The frequency would stay the same.
12. 36 Suppose the 600 W of radiation emitted in a microwave oven is absorbed by 250 g of water in a very light weight by 250 G of water in a very light weight cup. Approximately how long will it take to heat the water from 20 C to 80C? A. 50 S B. 100 S C. 150 S D 200 S
B. 100 S
STT 2.3 Which velocity- versus time graph goes with the position versus- time graph on the left?
C
STT 2.5 A particle moves with the velocity-versus-time graph shown here. At which labeled point is the magnitude of the acceleration the greatest?
C
15.22 Ultrasound can be used to deliver energy to tissues for therapy. It can penetrate tissue to a depth of approx. 200 times its wave length. What is the approx. depth of penetration of ultrasound at a frequency of 5.0 MHZ? A .29 mm B 1.4 cm C 6.3 Cm D 17 cm
C 6.3 Cm
14.28 A heavy brass ball is used to make a pendulum with period of 5.5 s how long is the cable that connects the pendulum ball to the ceiling? A 4.7 m B 6.3 m C 7.5m D 8.7 m
C 7.5 m
STT 1.3 Sarah starts at a positive position along the x-axis. She then undergoes a negative displacement. Her final position A is postive B Is negative C Could be either positive or negative
C Could be either positive or negative
STT 15 beginning of the chapter A wooden toy hangs from a spring, when you pull it down and release it, it reaches the highest point of its motion after 1 s. What is the frequency of its oscillation? a 2.0 hz b 1.5 hz c 1.0 hz d .5 hz
D
11.34 While keeping your food cold, your refrigerator transfers energy from the inside to the surroundings. thus thermal energy goes from a colder object to a warmer one. What can you say about this? A. It is in violation of the second law of thermodynamics B. It is not a violation of the second law of thermodynamics because refrigerators can have efficiency of 100%. C. It is not a violation of the second law of thermodynamics because of the the second law does not apply to refrigerators. D. The second law of thermo dynamics applies in this situation, but it is not violated because the energy did not spontaneously go from cold to hot.
D. The second law of thermo dynamics applies in this situation, but it is not violated because the energy did not spontaneously go from cold to hot.
STT 1.5 Rank in order from the fewest, the number of significant figures in the following numbers. A .43 B .0052 C .430 D 4.321 X 10^-10
D>C>B=A
1.24 A bird flies 3.0 km due west and then 2.0 due north. Another bird flies 2.0 km due west and 3.0 KM due north. What is the angle between the net displacement vectors for the two birds? A 23 Degrees B 34 Degrees C 56 degrees D 90 degrees
A 23 degrees
Ch 11.29 - A person is walking on level ground at constant speed. What energy transformation is taking place? A. Chemical Energy is being transformed into thermal energy B. Chemical Energy is being transformed into Kinetic energy C. Chemical Energy is being transformed to kinetic energy and thermal energy D. Chemical Energy and thermal energy are being transformed to kinetic energy
A Chemical Energy is being transformed into thermal energy
STT 1.2 Three motion diagrams are shown. Which is a dust particle settling to the floor at constant speed, which is a ball dropped from the roof of a building and which is a descending rocket slowing to make a soft landing on mars?
A, Dust particle b dropping ball. c descending rocket
2.26 A car can go from 0 - 60 mph in 12 S. A second car is capable of twice the acceleration of the first car. Assuming that it could maintain the same acceleration at higher speeds, how much time will this second car take to go from 0-120 MPH? A 12 S B 9.0 S C 6.0 S D 3.0 S
A,12 S
STT 11.5 Which of the following changes ( there may be more than one) would increase the max. theoretical efficiency of a heat engine? A Increase TH B Increase TC C Decrease TH D Decrease TC
A,D A increase TH D Increase TC
11. 32 200 J of heat is added to two gases, each in a sealed container. GAs 1 is in a rigid container that does not change with volume. Gas 2 expands as it is heated pushing out a piston that lifts a small weight. Which gas has the greatest increase in its thermal energy. A. Gas 1 B. Gas 2 C. Both gasses have the same increase in thermal energy.
A. Gas 1
11.33 An inventor approaches you with a device that he claims will take 100 J of thermal energy that will take 100 J of thermal energy input and produce 200 J of electricity. You decide not to invest your money because this device would violate A. The first law of thermodynamics B. The second law of thermodynamics C. Both the second and third law of thermo dynamics
A. The first law of thermodynamics
11. 31 The temperature of the air in a basketball increases as it is pumped up. This means that A. The total kinetic energy of the air is increasing and the average total kinetic energy of the molecules is decreasing B. The total kinetic energy of the air is increasing and the average kinetic energy of the molecules is increasing. C.The total kinetic energy of the air is decreasing and the average kinetic energy of the molecules is decreasing. D. The total kinetic energy of the air is decreasing and the average kinetic energy of the molecules is increasing.
B. The total kinetic energy of the air is increasing and the average kinetic energy of the molecules is increasing.
1.21 Which of the following options is described by the motion of figure Q 1.21? A an ice skater gliding across the ice B An airplane braking to a stop after landing C a car pulling away from a stop sign D a pool ball bouncing off a cushion and reversing direction
C a car pulling away from a stop sign
STT 11.3 Two samples of ideal gas, sample 1 and sample 2, have the same thermal energy. Sample 1 has twice the as many atoms as sample 2. What can we say about the temperatures of the two samples? A t1>t2 B t1=t2 C t1<t2
C t1<t2
11. 30 A person walks 1 km, turns around, and runs back to where he started. compare the energy used and the power during the two segments. A. The energy used and the power are the same for both. B. The energy used while walking is greater, the power while running is greater C. The energy used while runner is greater, the power while running is greater. D. The energy used is the same for both segments, the power while running is greater.
C. The energy used while runner is greater, the power while running is greater.
1.28 The earth formed 4.57 X 10^9 years ago. What is this time in seconds? A 1.67 X10^12 S B 4.01 X 10^13 S C 2.40 X 10^ 9 S D 1.44 X 10^17 S
D 1.44 X 10^17 S
2.19 A car is traveling at vx= 20 m/s . The driver apples brakes and the car slows down at ax=-4.0 m/s^2 what is the stopping distance? A 5.0 M B 25 m C 40 M D 50 M
D 50 M
2.18 The following options describes the motion of four cars !-D Which car has the largest acceleration? A Goes from 0 M/S to 10 M/s in 5.0 S B Goes from 0 M/S to 5.o m/s in 2.0 s C Goes from 0 M/S to 20 m/s in 7.0 S D Goes from 0 M/S to 3.0 M/s in 1 S
D Goes from 0 M/S to 3.0 M/s in 1 S
STT 2.7 A volcano ejects a chunk of rock straight up at a velocity of vy= 30 m/s. Ignoring air resistance , what will be the velocity Vy of the rock when it falls back into the volcano's crater? A >30 m/s B 30 m/s C 0m/s D -30 m/s E <-30m/s
D<-30 M/S
STT 5 An elevator is suspended from a cable. It is moving upward at a steady speed. Which is the correct free body diagram for this situation?
INSERT PIC
STT .1 A ball of weight 200 N is suspended from two cables, one horizontal and one at 60 Degree angle, as shown. Which of the following must be true about the tension in the angled cable? A T > 200 N B T=200 N C T<200 N
PIC
STT 5.6 The terminal speed of a styrofoam ball is 15 m/s. Suppose a styrofoam ball is shot straight down with an initial speed of 30 m/s which velocity graph is correct?
PIC
STT 5.7 Boxes P and Q are sliding to the right across a frictionless table. The hand, H is slowing them down . The mass of P is larger than the mass of Q. Rank in order from largest to smallest, the horizontal forces of P,Q and H A F Q on H = H on Q= F Pon Q= F Q on P B F Q on H = F H on Q> F P on Q = F Q on P C F Q on H = F H on Q , F P on W = F Q on P D F H on Q= F H on P > F P on Q
PIC
2.24 Figure 2.25 shows a motion diagram with the clock reading ( in seconds) shown at each position. From T = 9 s to t=15 S the object is at the same position. After that, it returns along the same track. The positions of the dots for T>or equal to 16 S are offset for clarity. Which graph best represents the object's velocity?
B
STT 2.2 Four objects move with the velocity-versus-time graphs shown. Which object has the largest displacement between t=0 and t=2s?
B
STT 2.4 An elevator is moving downward. IT is slowing down as it approaches the ground floor. Adapt the information in figure 2.25 to determine which of the following velocity graphs best represents the motion of the elevator?
B
1.26 Computer 3.24 M + .532 M to the correct number of Significant figures A 3.7 m B 3.77 M C 3.772 M D 3.7720 M
B 3.77 M
1.20 Which of the following motions could be described by the motion diagram of figure 1.20? A Hockey puck B cyclist braking to a stop C a sprinter starting a race D a ball bouncing off the wall
B Cyclist breaking to a stop
STT 11.7 Which of the following processes foes not involve a change in entropy? A an electric heater raised the temp ofa cup of water by 20C B a ball rolls up a ramp, decreasing in speed as it rolls higher C A basketball is dropped from 2 m and bounces until it comes to rest D the sun shines on a black surface and warms it
B a ball rolls up a ramp, decreasing in speed as it rolls higher
2.20 velocity vs time graphs for three drag racers are shown in figure Q2.20 at t=5.0 s which car has traveled the farthest? A andy B betty C carl D all have traveled the same distance
B, Betty
STT 1.6 Using the information in figure 1.23 what is the distance to the nearest CM in the triangle at the right? A 26 cm B 20 cm C 17 cm D 15 CM
D 15 cm
STT 11.2 A runner is moving at a constant speed on level ground. Chemical energy in the runner's body is being transformed into other forms of energy. Most of the chemical energy is being transformed into A kinetic energy b potential energy c thermal energy
c thermal energy
2.23 suppose a plane accelerates from rest for 30 S, achieving a takeoff speed of 80 m/s after traveling a distance of 1200 M down the runway. A smaller plane with the same acceleration has a takeoff speed of 40 M/S. Starting from rest, after what distance will this smaller plane reach its takeoff speed? A 300 m B 600 M C 900 M D 1200 M
A 300 M
1.29 An objects average density P is defined as the ratio of its mass to its volume. P = M/V. The earth's mass is 5.94 X 10^24 ks and its volume is 1.08 X 10^12 km^3. What is the earth's average density? A 5.50 X 10^3 Kg/M^3 B 5.50 X 10^6 Kg/M^3 C 5.50 X 10^9 Kg/M^3 d 5.50 X 10^12 Kg/M^3
A 5.50 X 10^3 Kg/M^3
1.19 You throw a rock upward. The rock is moving upward, but it is slowing down. As we define the ground as the origin, the position of the rock is _____ and the velocity of the rock is _____ A Positive, positive B positive negative C negative positive D Negative Negative
A Positive, positive
STT 2 A bicycle is moving to the left with increasing speed. Which of the following motino diagrams illustrates this motion?
B
2.25 a car can go from 0 to 60 mph in 7.0 S Assuming that it could maintain the same acceleration at higher speeds, how long would it take the car to go from 0-120 MPH? A 12 S B 14 S C 21 S D 28 S
B14 S
STT 11.4 You have driven your car for awhile and now turn off the engine. Your car's radiator is at a higher temperature than the air around it. Considering the radiator of a car as as the system, as the radiator cools down, we can say that A Q>0 B Q=0 C Q<0
C Q<0
STT 11.1 crane 1 uses 10 kj of energy to lift a 50 kg box to the roof of the building. Crane 2 uses 20 kj to life a 100 kg box the same distance. Which crane is more efficient? A crane 1 b crane 2 C both use the same efficiency
C both use the same efficiency
4.29 Figure 4.29 shows block A sitting on top of block B. A constant force, F is exerted on block B, causing block B to accelerate to the right. Block A rides on block B without slipping. Which statement is true? A Block exerts a friction force on block A B Block B exerts a friction force on block A, directed to the right C Block B does not exert a friction force on block A
PIC
STT 5.2 A martian lander is approaching the surface. It is slowing its descent by firing its rocket motor. Which is the correct FBD for the lander?
PIC
STT 5.4 A mountain biker is climbing a steep 20 degree slope at a constant speed. The cyclist and bike have a combined weight of 800 N. Referring to 5.11 for guidance, what can you say about the magnitude of the normal force of the ground on the bike? A n>800 n B n=800 n c n<800 n
PIC
STT 5.5 Rank in order from largest to smallest, the size of the friction forces Fa to Fe in the five different situations ( one or more frictions could be zero). The box and the floor are made of the same situations in all situations.
PIC
STT 15.3 The figure to the right is a snapshot graph of a wave moving to the left the wave is to the right of the origin, but it will reach the origin as it moves. construct a history graph for the motion of the marked point at the origin following the approach shown in figure 15.7. Which of the graphs is the correct history graph?
A
14.24 Figure Q14.24 represents the motion of a mass on a string. A What is the period of the oscillations? A 12 S B 24 S C 36 S D 48 S E 50S B What is the amplitude of the oscillation? a 1.0 cm b 2.5 cm c. 4.5 cm D 5.0 cm E 9.0 Cm C What is the position of the mass at T = 30 a-4.5 cm B -2.5 cm C 0.0 cm D 4.5 cm E 30 cm D when is the first thime the velocity of the mass is at zero? a 0s b 2s c 8s d 10s e 13s E At which of these times does the kinetic energy have its max. value? a 0s b 8s c 13s d 26s e 30s
A - B B-C C -B D-B E-B
STT 12.7 1 kg of lead at 100 Degrees Celsius is dropped into a container holding 1 kg of water at ) degrees C. Once the lead and water reach thermal EQ , the final temp is A <50 C B 50 C C >50 C
A <50 C
StT 12.2 a sample of ideal gas law is in a sealed container. The tmp of the gas and the volume of the container are both increased. what other properties of the gas necessarily change( more than one answer might be correct) A A the rms of speed of the gas atom B thermal energy of the gas C the pressure of the gas D the number of molecules in a gas
A A the rms of speed of the gas atom B thermal energy of the gas
12.33 A cup of water is heated with a heating coil that delivers 100W of heat. In one minute, the temperature of water rises by 20C. What is the mass of water? A. 72 G B. 140 G C. 720 G D. 1.4 KG
A. 72 G
STT 1.7 P and Q are two vectors of equal length but different directions. Which vector shows the sum of P + Q?
B
STT 16.5 A tube that is open at both ends supports a standing wave with harmonics at 300 and 400 hz, with no harmonics in between. What is the fundamental frequency of this tube? A 50 hz B 100 Hz C 150 Hz D 200 Hz E 300 Hz
B 100 Hz
16.24 resonances of the ear canal lead to increased sensitivity of hearing, as we've seen. Dogs have a much larger ear canal- 5.2 cm- than humans. What are the two lowest frequencies at which dogs have an increased in sensitivity? The speed of sound in the warm air of the ear is 350 m/s A 1700 hz, 3400 hz B 1700 hz, 5100 hz C 3400, 6800 hz 3400, 10,200hz
B 1700 hz, 5100 hz
STT 12.6 kg of barely molten lead at 328 degree C is poured into a large breaker of holding liquid water right at the boiling point, 100 Degrees C. What ist he mass of water that will be boiled way as the lead solidifies? A 0kg B <1 kg C 1 kg D >1 kg
B <1 kg
MCQ 15.20 Denver, colorado has an oldies station that calls itself " kool 105" this means that they broadcast radio waves at a frequency of 105 MHz. Suppose that they decide to describe their station by its wave length in meters instead of by frequency, what name would they use now? a Kool 0.35 b Kool 2.85 c Kool 3.5 D Kool 285
B Kool 2.85
14.27 If you carry heavy weights in your hands, how will this affect the natural frequency at which your arms swing back and forth/ A frequency will increase B The frequency will stay the same C The fluency will decrease
B The frequency will stay the same, frequency does not depend on the mass
2.21 which of the three drag racers in question 20has the greatest acceleration at t=0? A andy B Betty C Carl
B betty
STT 14.3 The graphs in the table above apply to pendulum motions as well as the motion of a mass on a spring. a pendulum in a clock has a period of 2.0 seconds you pull the pendulum to the right- a positive displacement- and let it go. we call this time t=0. at what time will the pendulum A first be at it's maximum negative displacement B First have its maximum speed C first have it's maximum velocity D first have its maximum positive acceleration?
B,A,C,B
12.37 40,000 J of heat is added to 1.0 KG of ice at -10C how much ice melts? A. .012 KG B. .057 KG C. .12 KG D. 1.0 KG
B. .057 KG
12.34 Three identical beakers each hold 1000 g of water at 20C 100g of liquid water at 0C is added to the first beaker, 100 g of ice at 0C is added to the second beaker, and the third beaker gets 100G of aluminum at 0C. The contents of which container end up at the lowest final temperature? A. The first Beaker. B. The second Beaker C. The third beaker D. All end up at the same temperature
B. The second Beaker
12.38 Steam at 100 C causes worse burns than liquid water. This is because A Steam is hotter than water B. Water is transferred to the skin as steam condenses C. Steam has a higher specific heat than water D. Evaporation of liquid on the skin causes cooling
B. Water is transferred to the skin as steam condenses
1.22 A bird flies 3.0 KM due west and then 2.0 KM due north. what is the magnitude of the bird's displacement? A 2.0 km B 3.0 km C 3.6 km D 5.0 km
C 3.6 km
STT 15.8 Amy and Zach are both listening to the source of the sound waves that is moving to the right. Compare the frequencies of both. A F amy > F zach B F amy = f zach C F amy < f zach
C F amy < f zach
STT 15.5 Comparing two different types of electromagnetic waves infrared and ultraviolet, we can say that A infrared has a longer wavelength and higher frequency than ultraviolet B infrared has a shorter wavelength and higher frequency than ultraviolet C Infrared has a longer wavelength and lower frequency than ultraviolet D Infared has a shorter wavelength and lower frequency than ultraviolet
C Infrared has a longer wavelength and lower frequency than ultraviolet
STT 16.3 a 2 m long string carries a standing wave as in the figure to the right. Extend the pattern and the formulas shown in 16.13 to determine the mode number and the wavelength of this particular standing- wave mode A M=6 .67 m B M= 6 .80 m C M= 5 .80m D M=5 1.0 m E M= 4 .80m F m= 4 1.0m
C M= 5 .80m
STT 16.6 if you speak at a certain pitch, then hold your nose and continue speaking at the same pitch, your voice sounds very different. This is because A the fundamental frequency of your vocal cords has changed B the frequencies of the harmonics of your vocal cords has changed C The pattern of resonance frequencies of your vocal tract has changed, thus changing the formants
C The pattern of resonance frequencies of your vocal tract has changed, thus changing the formants
14.26 A car bounces up and down on its spring at 1.0 HZ with only the driver in the car. now the driver is joined by 4 friends. the new frequency of the oscillation when the car bounces on the springs is A greater than 1.0 hz B equal to 1.0 hz C less than 1.o HZ
C less than 1.o HZ
STT 14.1 two oscillating systems have periods t1 and t2, with t1< t2. how are the frequencies of the two systems related? A f1<f2 B f1=f2 C f1>f2
C the frequency is inversely proportional to the period, so a shorter period implies a higher frequency.
15.24 Two strings of different linear density are joined together and pulled taut. a sinusoidal wave on the string is traveling to the right, as shown in figure 15.24. When the eave goes across the boundary from string 1 to string 2, the frequency is unchanged, what happens to the velocity? A velocity increases B velocity stays the same C velocity decreases
C velocity decreases
14.6 A pendulum clock is made with a metal rod. It keeps perfect time at temperature 20 degrees celcius. at a higher temperature the rod lengthens. How will this change the clock's timing? A the clock will fun fast; the dial will be ahead of the actual time B the clock will keep perfect time C the clock will run slow; the dial will be behind the actual time
C, it will run slower
12.27 A tire is inflated to a gauge pressure of 35 PSI. The absolute pressure in the tire is. A Less than 35 PSI B. Equal to 35 PSI C. Greater than 35 PSI
C. Greater than 35 PSI
12. 29 A gas is compressed by an isotherm process that decreases its volume by a factor of 2. in this process, the pressure A. Does not change B. Increases by a factor of less than 2. C. Increases by a factor of 2 E. Increases by a factor of more than 2.
C. Increases by a factor of 2
STT beginning chapter 16 a 170 HZ wave in air has a wavelength of 2.0 m. The frequency is now 340 HZ what is the new wavelength? a 4.0 m b 3.0 m c 2.0 m d 1.0 m
D
15. 23 a sinusoidal wave traveling on a string has a period of .20 s a wave length of 32 cm and an amplitude of 3 com. what is the speed of the wave? A .60 cm/s B 6.4 cm/s C 15 cm/s D 160 cm/s
D 160 cm/s
STT 16.2 A standing wave is se t up on a string. a series of snapshots of the wave are superimposed to produce the diagram off on the right. What is the wavelength> A 6.0 M B 4.0 M C 3.0 M D 2.0 M E 1.0 M
D 2.0 M
16.25 The frequency of the lowest standing-wave mode on a 1.0 m long string is 20 hz. What i the wave speed on the string? A 10 m/s B 20m.s C 30 m/s D 40 m/s
D 40 m/s
16.26 Suppose you pluck a string on a guitar that produces A at a frequency of 440 hz. Now you press your finger down on the string against one of the frets, making this point the new end of the string. The newly shortened string is 4/5 o the length of the full string. When you pluck the string, its frequency will be A 350 hz B 440 hz C 490 hz D 550 hz
D 550 hz
16.21 Two sinusoidal waves with the same amplitude A and frequency f travel in opposite directions along a long string, you stand at one point and watch the string. The maximum displacement of the string at that point is A a B 2a C 0 D not enough information to decide
D not enough information to decide
STT 15.2 suppose you shake the end of a stretches string to produce a wave. which of the following actions would increase the speed of the wave down the string? There may be more than one correct answer; if so, give all that are correct. A move your hand up and down more quickly as you generate the wave B move your hand up and down a greater distance as you generate the wave C use a heavier string of he same length under the same tension D use a lighter string of the same length under the same tension E stretch the string tighter to increase the tension F loosen the string to decrease the tension.
D use a lighter string of the same length under the same tension E stretch the string tighter to increase the tension
16.18 Refer to the graph from the book At T=1s what is the displacement y of the string at x=7cm? A -1 cm B 0mm C .5 mm D 1mm E 2 mm 16.19 At X=3cm what is the earliest time that y wil equal 2 mm? a.5 s B .7 s c 1.0 s d 1.5 s e 2.5 s 16.20 At t=1.5 s what is the value of y at x=10 cm a -2.0 mm b -1.0 mm c -.5 mm d 0mm e 1.0 mm
D,a,B
11.35 An electric power plant uses energy from burning coal to generate steam at 450 Degrees Celsius. The plant is cooled by 20 Degrees Celsius water from a nearby river. If burning coal provides 100 MJ of heat, what is the theoretical minimum amount of heat that must be transferred to the river during the conversion of heat to electric energy? A. 100 MJ B. 90 MJ C. 60 MJ D. 40 MJ
D. 40 MJ
12.28 The number of atoms in a container is increased by a factor of 2 while the temperature is held constant. The pressure A decreases by a factor of 4 B. Decreases by a factor of 2 C. Stays the same D. Increases by a factor of 2 E. Increases by a factor of 4
D. Increases by a factor of 2
12.31 A gas is compressed by an adiabatic process that decreases its volume by a factor of 2. In this process the pressure A. Does not change. B. Increases by a factor less than 2. C. Increases by a factor of 2. D. Increases by a factor of more than 2.
D. Increases by a factor of more than 2.
12.35 100G of ice at 0C and 100 g of steam interact thermally in a well-insulated container. The final state of the system is A. An ice-water mixture at 0C B. Water at a temperature between 0C and 50C C. Water at 50C D. Water at a temperature between 50C and 100C E. A water- steam mixture at 100C
E. A water- steam mixture at 100C
STT 16.8 You hear three beats per second when two sound tones are generated. The frequency of one tone is known to be 610 hz. The frequency of the other is A 605 hz b 607 hz C 613 hz D 616 hz E Either A or D F Either B or C
F Either B or C
14.5 Four mass-- spring systems have masses and spring constants shown here. rank in order from highest to lowest, the frequencies of the oscillations
FD>FC=FB>FA
14.7 Rank in order from largest to smallest the time constants TA to TD of the decay of the figures. The scale on all the graphs are the same
TD>TB=TC>TA
STT 15.7 You are overhearing a very heated conversation that registers 80 dB. you walk some distance away so that the intensity level decreases by a factor of 100. what is the sound intensity now? a 70 db b 60 dB C 50dB D 40dB E 30dB F 20dB
b 60 dB
STT before chapter 12 A blender does 5000 J of work on the food in its bowl. During the time the blender runs, 2000J of heat is transferred from the warm food to the cooler environment. What is the change in the thermal energy of the food? a +2000J b+3000 J c + 7000 J d -2000J e-3000J
b+3000 J