physics 101 final
A wave with a long wavelength has a relatively
low frequency
A substance that heats up relatively quickly has a
low heat capacity
more disorder means
more entropy
straight up and down motion
natural motion
Air resistance allow objects to develop full acceleration due to gravity.
no
Do internal and external forces cancel each other out if two objects are not in the same system?
no
weight and mass are the same quantities?
no
The thermal energy in a substance is related mostly to the
none of the above
While a car travels around a circular track at constant speed, its
none of the above
A good heat conductor is a
poor insulator
When you stand on tiptoes on a bathroom scale, there is an increase in
pressure on the scale, not registered as weight
A bottle of sulfuric cid has a mass of 3.62 kg and a density of 1.81 kg/L. What is the volume?
2 L
A golfer sinks a putt 3 seconds after the ball leaves the club face. If the ball traveled with an average speed of 0.8 m/s, how long was the putt?
2.4 m/s
A car has a mass of 1000 kg and accelerates at 2 m/s2. What is the magnitude of the force exerted on the car?
2000
temp of boiling water
212 F and 100 C
Some propane occupies 125 cm3 at 11.0 degrees C. Find the temperature when the volue of the propane is 105 cm3. (Assume that the pressure is held constant)
238 K
A poor conductor of heat is a
a good insulator
A whitish sky is evidence that the atmosphere contains
a mixture of particle sizes
Which will warm up quicker in sunlight?
a piece of colored glass
Sound waves cannot travel in
a vacuum
When a solid is changed to a liquid phase, the solid
absorbs energy
If the mass of an object does not change, a constant net force on the object produces constant
acceleration
Newton's second law directly involves
acceleration
light travels faster in a vacuum
addition
You're lying on the sand on a breezy day when a pesky fly wishes to join you. The breeze is blowing at a steady 2 m/s. In order for the fly to land on you it should hover over you while flying
against the wind at 2/ms
An umbrella tends to jerk upward on a windy day principally because
air pressure is reduced over the curved top surface.
the vibrations of a longitudinal wave move in a direction
along the direction of wave travel.
When we consider the distance a pendulum swings to and fro we're talking about the pendulum's
amplitude
Warm air rises because faster moving molecules tend to move to regions of less
desity and pressure
A given net force propels an object along a straight-line path. If the net force were doubled, its acceleration would
double
When gas in a container is squeezed to half its volume, its density
doubles
What moves from place to place in wave motion is
energy
A shock wave is produced when the speed of an object
exceeds the speed of sound in the air
A bow wave is produced in water when the speed of an object
exceeds the speed of waves in water.
This type of motion occurs under the influence of the gravitational pull only
free fall
Different colors of light correspond to different light
frequencies
When we consider how frequently a pendulum swings to and fro we're talking about its
frequency
An electron vibrating to and fro 1000 times per second generates an electromagnetic wave having a
frequency of 1000 Hz
A good absorber of radiation is a
good emitter of radiation.
Light shines on a pane of green glass and a pane of clear glass. The temperature will be higher in the
green glass
Two objects of the same size but unequal weights are dropped from a tall tower. Taking air resistance into consideration, the object to hit the ground first will be the
heavier object
An object will normally be a net radiator of energy when its temperature is
higher than its surroundigs
Your room gets messier day by day. In this case entropy is
increasing
Galileo said that if you rolled a ball along a level surface it would
keep rolling without slowing down if no friction acted upon it
Pumice is a volcanic rock that floats. Compared with the density of water, its density is
less
An object should float in a liquid if it is
less dense than the liquid
Hot sand cools off faster at night than plants and vegetation, which indicates that the specific heat capacity for sand is
less than that for plants.
Evaporation is a cooling process because
the more energetic molecules are able to escape the liquid.
Compared with the mass of a certain object on Earth, the mass of the same object on the Moon is
the same
A Doppler effect occurs when a source of sound moves
towards you or away from you
Polarization is a property of
transverse waves
Sound waves can interfere with one another so that no sound is produced.
true
A change in pressure at any point in a confined fluid at rest is transmitted
undiminished to all points in the fluid
Convection currents in the air near a seashore are produced by
unequal heating of land and water
Sound waves can interfere with one another so that no sound is produced.
upward
Sound refraction depends on the speed of sound being
variable
The property by which objects resist changes in motion is known as
velocity
The source of all sounds is something that is
vibrating
The source of all wave motion is a
vibrating object
During a very cold winter, water pipes sometimes burst because
water expands when freezing
The filling of a hot apple pie is hotter than the crust due to
water in the filling that better retains thermal energy.
The greatest expansion of water occurs when
when it turns to ice
The complementary color of blue is
yellow
When a falling object has reached its terminal velocity, its acceleration is
zero
Whenever the net force on an object is zero, its acceleration
zero
A snail travels 45 cm in 20 min. It's average speed is
135
A body is accelerating at 10 m/sec2 with a velocity of 2 m/sec in 4 seconds. Find the initial velocity of the body?
-38 m/s
A 10-N falling object encounters 10 N of air resistance. The net force on it is
0
If the frequency of a certain wave is 10 Hz, its period is
0.1 seconds
Compared with the mass of a certain object on Earth, the mass of the same object on the Moon is
10 N
When a falling object gains 10 m/s each second, its acceleration is
10 m/s^2
A car accelerates at 2 m/s2. Assuming the car starts from rest, how much time does it need to reach a speed of 20 m/s?
10 seconds
An airplane reaches its takeoff speed of 60 m/s in 30 sec starting from rest. The time it spends in going from 40 m/s to 60 m/s is
10 seconds
What is the buoyant force acting on a 10-ton ship floating in a fresh-water lake?
10 tons
What is the weight of water displaced by a 100-ton floating ship?
100 tons
When a baseball player hits a ball with a force of 1000 N, the ball exerts force on the bat of
1000 N
The mass of a 2,200 lb elephant is
1000 kg
Before ice can form on a lake, all the water in the lake must be cooled to
4 C
If a ball rolls down an inclined plane and picks up 4 m/s each second it rolls, its acceleration is
4 m/s^2
Convert 113 degrees Farenheit into degrees Celsius
45 C
If 96.5 grams of gold has a density of 19.3 g/cm3 what is the volume?
5 cm^3
A nutritionist in the United States measures the food energy in units of
Calories
which has zero velocity?
an object moving at constant velocity an object in mechanical equilibrium an object at rest
According to Newton's First Law of Motion,
an object remains at rest unless acted upon by a net force
aristotle treated motion by
classifying it into two classes
The virtual image formed by a __________________ mirror is smaller and closer to the mirror than the object.
convex
Newton's law of cooling applies to objects that are
cooling and warming
If the pressure on a gas is constant and the tempertaure is decreased, the volume will
decrease
As water in a confined pipe speeds up, the pressure it exerts against the inner walls of the pipe
decreases
When gases change to a liquid phase, they
release energy
The sky is blue because air molecules in the sky act as tiny
resonators that scatter blue light
The force exerted on the tires of a car to directly accelerate it along a road is exerted by the
road
Consider two tubes filled with water at the same height, one with fresh water and the other tube with salt water. The pressure is greater at the bottom of the tube with
salt water
You dip your finger repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves
shortens
Reverberation is a phenomenon you would likely to hear if you sing in the
shower
Which of the following is a longitudinal wave?
sound
Which of the following is not a transverse wave?
sound
A dolphin perceives its environment by the sense of
sound and sight
An object is pulled with two forces, 10 N northward and 15 N southward. The direction of the net force is to the
south
It is difficult to see the roadway in front of you when you are driving on a rainy night mainly because
the film of water on the roadway makes the road less diffuse.