The main difference between gases and plasmas has to do with
A) the kinds of elements involved.
B) interatomic spacing.
C) electrical conduction.
D) fluid pressure.
E) the proportion of matter to antimatter in the universe.
While standing, your blood pressure is normally greatest in your
A) head.
B) heart.
C) feet.
D) same in each
The phenomenon of beats is a result of sound
A) refraction.
B) reflection.
C) interference.
D) all of the above
E) none of the above
The nucleus that has the least mass per nucleon is
A) hydrogen.
B) iron.
C) lead.
D) uranium.
E) plutonium.
Using the relativistic velocity-addition formula for adding everyday velocities produces
A) nonsense.
B) a significantly better result than adding them classically.
C) a classical result.
The first to be credited with the idea that light is quantized was
A) Max Planck.
B) Albert Einstein.
C) both Planck and Einstein at about the same time.
As Bronco Brown steps off a hovering high-flying helicopter and falls through the air,
he experiences
A) an impulse.
B) an increasing speed.
C) a decreasing acceleration.
D) all of the above
A constant net force on a rail-road car produces constant
A) velocity.
B) acceleration.
C) both of these
D) neither of these
When an object absorbs as much as it radiates
A) it remains at about the same temperature.
B) it is a net absorber.
C) it is a net radiator.
D) none of the above
A projectile is launched from ground level at 15 above the horizontal and lands
downrange. What other projection angle for the same speed would produce the same
down-range distance?
A) 30
B) 45
C) 50
D) 75
E) 90
The resultant of a 40-N force at right angles to a 30-N force is
A) 30 N.
B) 40 N.
C) 50 N.
D) greater than 50 N.
Assuming that xenon (atomic number 54) and krypton (atomic number 36) have the
same temperature and pressure, in which gaseous medium does sound travel faster?
A) Xenon
B) Krypton
C) a mixture of both
D) the same in both
The main difference between the retina of a human eye and that of a dog’s eye is the
A) predominance of cones in a dog’s retina.
B) absence of cones in a dog’s retina.
C) more intricate optic nerve in a human’s eye.
D) small number of cones in a human’s eye.
E) none of the above
A person standing waist-deep in a swimming pool appears to have short legs because of
light
A) reflection.
B) absorption.
C) interference.
D) diffraction.
E) refraction.
The redness of the lunar eclipse is due to
A) refraction of sunsets and sunrises all around Earth.
B) infrared light continually emitted by the Moon.
C) scattering of lower frequencies of light by the Moon.
D) dim light that is incident upon the Moon by Jupiter and other planets.
Which of these electromagnetic waves have the longest wavelength?
A) radio waves
B) infrared waves
C) X-rays
D) ultraviolet waves
E) light waves
A falling 1-N apple hits the ground with a force of about
A) 1 N.
B) 2 N.
C) 4 N.
D) 10 N.
E) need more information
Which travels with the greatest speed in a vacuum?
A) radio waves
B) light waves
C) X-rays
D) gamma rays
E) all have the same speed
The disadvantages to fission power plants include
A) radioactive waste disposal.
B) production of plutonium for possible weapons proliferation.
C) risk of accidental release of radioactivity.
D) all of the above
E) none of the above
Science, art, and religion normally need not contradict one another because
A) all three involve different domains.
B) choosing the right one means no need to heed the other two.
C) choosing religion and art means no need to heed science.
D) choosing science means no need to heed religion and art.
If a compass is moved from the Northern Hemisphere to the Southern Hemisphere, its
magnetic needle will change direction
A) randomly and rapidly
B) by 90 degrees.
C) by 180 degrees.
D) hardly at all.
Matter in the plasma state is commonly found in
1) dry ice.
2) molten lava.
3) the flame of a high-temperature welding torch.
Compared to solids, liquids, and gases in the universe, plasma is the most
4) abundant.
5) rare.
6) there is no valid estimate at this time.
Metals are good conductors of both heat and electricity due to
A) similar thermal and electrical conductive properties.
B) looseness of outer electrons in metal atoms.
C) relatively high densities of metals.
D) high elasticity of metals.
E) both transferring energy easily.
Newton’s Cradle consists of an aligned row of identical elastic balls suspended by
strings so they barely touch one another. When two balls are raised from one end and
released, they strike the row and two balls pop out from the other end. If instead, one
ball popped out with twice the speed of the two, this would violate
A) momentum conservation.
B) energy conservation.
C) both of these
D) none of these
For increased atmospheric pressure, the boiling point of water
A) goes down.
B) rises.
C) remains at 100 degrees C.
If you release a single molecule in an evacuated region it will initially
A) fall just as a baseball would.
B) move in any direction.
C) convect upward.
D) be buoyed upward.
E) none of the above
At the beach you see a friend facing away from you. Keeping quiet you can cause her to
turn around by
A) staring intently at her back.
B) tossing small pebbles at her back.
C) although staring will be less effective, both will affect a turn-around.
D) none of the above
Inside a freely-falling elevator, you would have no
A) gravitational force on you.
B) weight.
C) both of these
D) neither of these
Which of these is a transverse wave?
A) a Slinky shaken to and fro.
B) a radio wave
C) a sound wave
D) all of the above
E) none of the above
The energy of a photon depends on its
A) speed.
B) frequency.
C) amplitude.
D) all of the above
E) none of the above
Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the
tendency of the rock is to
A) follow a circular path.
B) slow down.
C) follow a straight-line path.
D) stop.