CAS PY 55299

subject Type Homework Help
subject Pages 9
subject Words 1223
subject Authors Paul G. Hewitt

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page-pf1
Refraction causes the bottom of a swimming pool to appear
A) farther down than it actually is.
B) closer to the surface than it actually is.
C) neither of these
A profound message from all of science is that we are a part of nature
A) that stands above other life forms.
B) and have the ability to conquer it.
C) that is becoming more and more conscious of itself.
All places on Earth would have high tides at the same instant if the
A) Moon did not revolve.
B) Moon did not rotate.
C) Sun did not revolve.
D) Sun did not rotate.
E) none of the above
page-pf2
Plasmas are a central part of power generation in
A) MHD generators.
B) turbo generators.
C) both of these
D) neither of these
Escape speed from the Sun is
A) about the same as from Earth.
B) very much greater than for Earth.
C) indefinite.
page-pf3
The shape of a magnetic field surrounding a current-carrying conductor is
A) consistent with the inverse-square law.
B) radial.
C) circular.
D) all of these
E) neither of these
Both black and white road surfaces radiate energy. At midnight on a starry night the
warmer road surface is the
A) black surface.
B) white surface.
C) neither, as no noticeable difference.
Consider the fictional case of the incredible shrinking woman. If a fictional shrinking
woman shrinks to 0.1 her original height, her total skin area shrinks to
A) 0.1 times its original value.
B) 0.01 times its original value.
page-pf4
C) 0.001 times its original value.
D) 0.0001 times its original value.
E) none of the above
Colors seen on the cover of your physics book are due to color
A) addition.
B) subtraction.
C) either of these
D) neither of these
Which of these is affected by mass?
A) a freely-falling object
B) an object sliding down a friction-free plane
C) a pendulum
D) all of the above
page-pf5
E) none of the above
Materials composed of molecules that absorb large amounts of energy in the form of
internal vibrations and rotations have
A) low specific heats.
B) high specific heats.
C) none of the above
A substance that cools down faster than others has a
A) low specific heat capacity.
B) high specific heat capacity.
C) either of these
D) neither of these
page-pf6
When a high-velocity beam of electrons is bent by a magnetic field, relativistic effects
A) increase momentum beyond its classical value.
B) reduce the angle at which the beam is bent.
C) both of these
D) neither of these
We are actually looking into the past when we look at
A) a distant star.
B) our physics book.
C) actually both of these
D) none of the above
When a pair of 1-ohm resistors are connected in series, their equivalent (combined)
resistance is 2 ohms, and when connected in parallel is
page-pf7
A) ohm.
B) none of the above
C) also 2 ohms.
Diffraction is least when illumination is with
A) red light.
B) blue light.
C) an electron beam
D) none of the above
When a boxer is moving away from a punch, the force experienced is reduced because
A) momentum transfer is reduced.
B) the time of contact is increased.
C) the force is less effective.
D) all of the above
page-pf8
As a block of ice at 0oC melts, the block absorbs energy
A) and decreases in temperature.
B) and increases in temperature.
C) without a temperature change.
D) all of the above
E) none of the above
If you stretch a copper wire so that it is thinner, the resistance between its ends
A) decreases.
B) remains unchanged.
C) increases.
page-pf9
Consider massive gliders that slide friction-free along a horizontal air track. Glider A
has a mass of 1 kg, a speed of 1 m/s, and collides with Glider B that has a mass of 5 kg
and is at rest. If they stick upon collision, their speed after collision will be
A) 1/4 m/s.
B) 1/5 m/s.
C) 1/6 m/s.
D) 1 m/s.
E) none of the above
As a high-altitude balloon sinks lower into the atmosphere, it undergoes a decrease in
A) volume.
B) density.
C) weight.
D) mass.
E) none of the above
page-pfa
Electromagnetism unites
A) electricity and magnetism.
B) electric and gravitational fields.
C) physics and biophysics.
D) all of the above
E) none of the above
Internal energy in thermodynamics is the same as
A) temperature.
B) thermal energy.
C) heat.
D) all of the above
The type of lens that spreads parallel light is a
A) converging lens.
B) diverging lens.
page-pfb
C) combination of converging-diverging lens.
Earth's primary energy source is
A) the Sun.
B) fossil fuel.
C) electricity.
D) geothermal.
When a gas in a container is squeezed to half its volume, its density
A) halves.
B) doubles.
C) quadruples.
D) remains the same.
page-pfc
Early 21st Century research in nuclear fusion uses
A) laser beams.
B) ultra-hot plasmas.
C) both of these
D) neither of these
An object falls freely from rest on a planet where the acceleration due to gravity is
twice as much as on Earth. In the first 5 seconds it falls a distance of
A) 100 m.
B) 150 m.
C) 250 m.
D) 500 m.
E) none of the above
page-pfd
Scotty Skydiver of mass 100 kg experiences air resistance of 500 N, and an acceleration
of about
A) 0.2 g.
B) 0.3 g.
C) 0.4 g.
D) 0.5 g.
E) greater than 0.5 g.
Pigeons navigate primarily by
A) a good memory.
B) a keen sense of smell.
C) magnetic sensors in their heads.
D) ultra-high-pitched sounds.
E) none of the above
page-pfe
The solar constant is the
A) input of solar energy per square meter atop Earth's atmosphere.
B) difference between solar energy atop the atmosphere and that reaching ground.
C) maximum amount of energy Earth receives from the Sun.
A plasma differs from a gas in that
A) its molecules are farther apart.
B) it is hotter than a gas.
C) it is electrically conducting.
D) its atoms are boosted to higher atomic numbers.
E) all of the above

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