spring honors physics exam review
a 4 ohm, a 52 ohm, and a 12 ohm resistor are connected in series with a 12 volt battery. what is the current in the circuit?
.176 amps
a 5 ohm, a 21 ohm, and a 6 ohm resistor are connected in series with a 25 volt battery. what is the current in the circuit?
.781 amps
conveyor belts are often used to move packages around warehouses. the conveyor shown below moves packages at a steady 4 m/s. a 500 N employee decides to catch a ride by sitting on a 1,000 N box for a 50 m trip as shown below. what is the work done by the employee on the box shown above?
0 joules
during an investigation students are examining the frequency of their own voices. if a typical sound wave associated with speech has a frequency of 500 Hz, what is the wavelength?
0.688 meters
a 50 kg boy on a skateboard approaches a hill traveling at 8m/s. the boy comes to a stop at point 3. assume friction is negligible. how much kinetic energy does the boy have at point 2?
1110 joules
what is the total electrical energy used by a 9 volt battery when connected to a 15 ohm resistor for 25 seconds?
135 joules
a student is preparing to take a bath when she realizes the hot water tap in the bathroom is not working. the student goes to the kitchen and prepares 10 L of 100°C water to mix with 90 L of 10°C water. what will be the final temperature of the bath water?
19°C
a 4 ohm, a 10 ohm, and a 13 ohm resistor are connected in series with a 12 volt battery. what is the equivalent resistance?
27 ohms
a wave traveling at 1.5 x 10^2 meters per second has a wavelength of 5 x 10^-2 meters. what is the frequency of the wave?
3.0 x 10^3 ?Hz
a 9 ohm, a 2 ohm, and a 27 ohm resistor are connected in series with a 12 volt battery. what is the equivalent resistance?
38 ohms
a net force of 30 newtons acting north on an object for 3 seconds will produce an impulse of -
90 kg-m/sec north
a skateboarder travels back and forth on a u-shaped track during a time trial at a competition. the graph shows the skateboarders speed as a function of time studying the trial. which labeled point on the graph identifies the time drifting the trial that the skateboarder most likely has equal amount of potential and kinetic energy?
R
two waves travel towards each other. what will be the resulting wave look like when point a and point b meet at point x?
^ / \ / \ / \ _______________________ \ / \ / \ / V
which of the following best describes electrical insulators?
charges do not move through the insulator
a student is cooking an egg in a pan on a stovetop. what is the main method of heat transfer between the pan and the egg?
conduction
the objective lens is a microscope magnifies the image of the spectrum on the slide, therefore the lens must be
convex
what is the major difference between the behavior of light waves and sound waves ?
diffraction of light waves is noticeable only through very tiny openings like diffraction gratings while sound waves can even diffract around large openings like doorways.
four containers are filled with 2 kg of water at 20 degree celsius. the containers are placed equidistant from a heater. Which water will be the warmest after 10 minutes?
dull black metal
which of the following surrounds a moving electric charge?
electric and magnetic fields
which of the following surrounds a stationary electric charge?
electric fields
while switching electrical current from a battery on and off, Hans Christian Orsted made an interesting observation. He noticed that every time the electrical current was flowing from the battery, the needle on his compass would be deflected. Which fundamental force was responsible for this observation?
electromagnetic force
Copper is a good conductor of electricity because
electrons flow readily through the metal
how can you calculate the electrical resistance given the info below?
find the inverse of the slope
which of the following produces almost all of the electricity that people use every day?
generators
tanning ands emit 2 types of UV radiation: 97% is UVA with wavelengths between 320 and 400nm, and 3% UVB wavelengths between 290 - 320 no. compared to UVA, UVB has
higher frequency and higher energy
a roller coaster travels the path below. the potential energy G point c
is greater than the potential energy at point d
if two parallel, conducting plates have equal positive charges, it is very likely the electrical field lines -
leave both plates and go to infinity
A car traveling on a level road initially has 440 kJ of mechanical energy. After the brakes are applied for a few seconds, the car has only 110 kJ of mechanical energy. What best accounts for the missing mechanical energy?
most of the missing mechanical energy has been converted to heat energy through friction
what is the SI unit for electrical force?
newton
which pendulum has the smallest frequency?
pendulum 1
the electrical field at the surface of a positively charged conductor has a direction described by by which of the following?
perpendicular outward and away from the charge
a singer breaks a crystal glass by hitting the right note. which phenomenon explains why the glass shattered?
resonance
a student performs an experiment with a ripple tank. the wave parted is shown in the diagram. if the source of the wave is at point s, which way is the source moving?
right
silicon is a substance often used in electrical devices. silicon has a high electrical resistance compared to metals which mean that it does not release its electrons very easily. however, it does conduct electricity when the right conditions are met. these properties allow electronic devices to control the electrical current sent through silicon much easier than a typical metal substance. The properties of silicon would cause it to be best classified as a -
semiconductor
a students wants to generate an electric current using a bar magnet and a coil of wire. which experimental setup will generate the greatest electrical current?
setup M
before 1820 magnetism and electricity were believed to be different types of forces caused by different physical processes. in 1820 Hans Christian Orsted conducted an experiment with compasses and wire. the diagram above shows the results of his experiment. this experiment was important because it -
showed that electricity and magnetism are related
a sound wave can travel through liquids and solids, as well as through gases like air. which of these longitudinal wave characteristics will always be the same in a steel beam at a constant temperature?
speed
a student conducts an experiment in which kids ride down a ramp on a skateboard. a student wants to use the work-kinetic energy theorem to determine the height of the ramp. the student collects the following data. what conclusion can be made based on the data?
student c started at the highest part of the ramp
a long, straight wire carries an electrical current. which of the following is the best description regarding the magnetic field created by the current?
the magnetic fields circle the wire forming a loop
a mass is attached to a spring. the mass is pulled down an additional 10 cm and released. which best describes the energies in the spring?
the potential energy is greatest and the kinetic energy is lowest when the spring is just pulled down
a student makes a graph that shows the electric current through a resistor over time. which of the following conclusions does the graph best support?
the voltage across the resistor increases until it reaches a constant value
as shown below a 40 kg student is stationary and alone on a frozen frictionless pond with nothing but a 5kg ball. the student would like to return home. according to the above information and image, what can the student do to get back home?
throw the ball directly away from the house
when you see your image in a plane mirror, the image appears to be behind the mirror, upright and the same size as you are. this is the description of a _________ image.
virtual
which of the demonstrates the relationship between frequency and wavelength for sound waves traveling through air?
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