CAS PY 90566

subject Type Homework Help
subject Pages 9
subject Words 1185
subject Authors Paul G. Hewitt

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page-pf1
The work you do when pushing a shopping cart twice as far while applying the same
force is
A) half as much.
B) twice as much.
C) four times as much.
D) the same amount.
Fusing two iron nuclei would occur with
A) absorption of energy.
B) release of energy.
C) neither of these
Light behaves primarily as a wave when it
A) travels from one place to another.
B) interacts with matter.
C) both of these
page-pf2
D) neither of these
A nucleon has a mass of about
A) 1 amu.
B) 1 atomic mass unit.
C) both are the same.
D) none of the above
Which color of visible light carries the most energy per photon?
A) red
B) green
C) blue
D) violet
E) all the same
page-pf3
A heavy iron ball is placed in an aluminum pie pan that floats in a bucket. The water
level at the side of the bucket is marked. Then the ball is removed and allowed to sink
in the bucket. The water line at the side of the bucket
A) goes down.
B) is the same.
C) rises.
A mobile phone is pulled northward by a force of 10 N and at the same time pulled
southward by another force of 15 N. The resultant force on the phone is
A) 0 N.
B) 5 N.
C) 25 N.
D) 150 N.
page-pf4
The F in FM radio stands for
A) frequency.
B) forced vibration at which resonance occurs.
C) foul.
D) female.
E) fax.
Radium (A = 88) transmutes to radon (A = 86) by
A) beta emission.
B) alpha emission.
C) gamma emission.
D) none of the above
Control is maintained in a nuclear reactor by control rods that
A) absorb excess neutrons.
B) emit fast neutrons.
page-pf5
C) both of these
D) neither of these
Heat a copper wire and its electric resistance
A) decreases.
B) remains unchanged.
C) increases.
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is
negligible the melon will return to its initial level with a kinetic energy of
A) less than 100 J.
B) more than 100 J.
C) 100 J.
D) need more information
page-pf6
Which has more energy per photon?
A) red light
B) blue light
C) both the same
If you throw a ball straight downward (in the absence of air resistance), after leaving
your hand its acceleration is
A) less than 10 m/s2.
B) 10 m/s2.
C) greater than 10 m/s2.
Relative to a fossil-fuel plant, a nuclear power plant produces
page-pf7
A) more electricity.
B) less heat and smoke.
C) less pollution.
D) all of the above
E) none of the above
The least buoyant force on a rock is when it is submerged
A) near the surface.
B) halfway to the bottom.
C) near the bottom.
D) none of the above
A balloon will stick to a wooden wall if the balloon is charged
A) negatively.
B) positively.
C) either of these
page-pf8
D) neither of these
Mass number refers to the number of
A) protons in the nucleus.
B) neutrons in the nucleus.
C) nucleons in the nucleus.
The muzzle velocity of a bullet fired from a new rifle is 100 m/s. Neglecting air
resistance, at the end of one second a bullet fired straight up into the air will have
traveled a distance of
A) (100 - 5) m.
B) (100 + 5) m.
C) 100 m.
D) 5 m.
E) none of the above
page-pf9
More efficient gasoline engines could be built if they could withstand
A) greater rotational rates.
B) lower temperatures.
C) higher temperatures.
D) none of the above
Rapid evaporation of hot water can lead to
A) superheated steam.
B) the formation of ice.
C) both of these
D) neither of these
page-pfa
The lowest temperature possible in nature is
A) 0 degrees C.
B) -273 degrees C.
C) 4 K.
D) none of the above
When boarding an airplane you bring a bag of chips. While in flight the bag puffs up,
because
A) air pressure in the air-tight bag is greater than cabin air pressure.
B) suction is occurring.
C) air pressure is affected by the Bernoulli principle.
D) all the above
E) none of the above
Two identical gliders slide toward each other on an air track. One moves at 1 m/s and
the other at 2 m/s. They collide, stick, and moves at
A) 1/2 m/s.
page-pfb
B) 1/3 m/s.
C) 1/6 m/s.
D) 3/4 m/s.
E) 1.5 m/s.
A bullet is fired horizontally with an initial velocity of 300 m/s from a 20-m high tower.
If air resistance is negligible, the bullet hits downrange about
A) 200 m.
B) 300 m.
C) 400 m.
D) 500 m.
E) 600 m.
Which has the smaller critical mass; U-235 that releases 2.5 neutrons per fission, or
Pu-239 that releases 2.7 neutrons per fission?
A) U-235
page-pfc
B) Pu-239
C) both would have the same critical mass.
Which body glows with electromagnetic waves?
A) the Sun
B) the Earth
C) you and your classmates
D) all of the above
Assume that 10 J of work pushes a charge initially at rest into an electric field. If the
charge is then released, it flies back to its starting position with a kinetic energy of
A) zero.
B) 5 J.
C) 10 J.
D) more than 10 J.
E) need more information.
page-pfd
Colors seen on some TV screens result from color
A) addition.
B) subtraction.
C) either of these
D) neither of these
A cart maintains a constant velocity of 100 m/s for 10 seconds. During this interval its
acceleration is
A) zero.
B) 1 m/s2.
C) 10 m/s2.
D) none of the above
page-pfe
A main difference between a radio wave and a sound wave is
A) frequency.
B) wavelength.
C) energy.
D) amplitude.
E) medium or no medium.
When scrap iron in a boat is thrown overboard in a swimming pool, the pool level
A) rises.
B) falls.
C) remains unchanged.

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