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Which of the following has the longer wavelength?
A) a low-energy electron
B) a high-energy electron
C) both the same
D) none of the above
An efficient step-up transformer boosts
A) energy.
B) power.
C) voltage.
D) all of the above
E) none of the above
Hang time is the time your feet are off the ground in a jump. If you jump upward inside
a moving vehicle, your hang time will be
A) slightly more.
B) the same.
C) slightly less.
The most disorderly arrangement of energy within matter is also
A) the least probable state of matter.
B) the most probable state of matter.
C) a matter of certainties, not probabilities.
D) none of the above
When U-235 undergoes fission, the total number of protons in the fragments is
A) 90.
B) 91.
C) 92.
D) 93.
E) none of the above
Repeatedly dipping your fingers into water produces waves. Increasing the frequency of
dipping produces waves that are
A) shorter.
B) longer.
C) the same.
The wind instrument with no keys or valves is a
A) trumpet.
B) saxophone.
C) clarinet.
D) bugle.
It is important that the two metals that compose a bimetallic strip have
A) different conductivities.
B) different rates of expansion.
C) equal thicknesses.
D) all of the above
E) none of the above
The time it takes a projectile fired straight up at 10 m/s to reach the top of its path is
about
A) 1 s.
B) 2 s.
C) 10 s.
D) not enough information
Your friend says that the heavyweight champion of the world cannot exert a force of 50
N on an isolated piece of tissue paper with his best punch. You
A) agree that it can't be done.
B) have reservations about this assertion.
C) disagree, for a good punch easily delivers this much force.
When a vapor condenses, energy is
A) absorbed by the vapor.
B) released from the vapor.
C) both of these
D) neither of these
As a parcel of air is swept upward, with no heat input or output, its temperature
A) increases.
B) decreases.
C) remains the same.
A freely-falling watermelon falls with constant
A) velocity.
B) speed.
C) acceleration.
D) distances each successive second.
A reason for electric shielding inside a conductor is that any free electrons inside would
A) not obey the inverse-square law.
B) cancel one another.
C) be set in motion until equilibrium is established, on the outside.
D) all of the above
E) none of the above
A motorcycle of mass 100 kilograms slowly rolls off the edge of a cliff and falls for
three seconds before reaching the bottom of a gully. Its momentum upon hitting the
ground is
A) 1,000 kg m/s.
B) 2,000 kg m/s.
C) 3,000 kg m/s.
D) 4,000 kg m/s.
E) 9,000 kg m/.
When Joshua brakes his speeding bicycle to a stop, kinetic energy is transformed to
A) potential energy.
B) energy of motion.
C) energy of rest.
D) heat.
The force of gravity acts on all apples on an apple tree. Some apples are twice as far
from the ground as others. For the same mass these twice-as-high apples have
A) 1/4 the weight.
B) 1/2 the weight.
C) practically the same weight.
When Burl and Paul stand on opposite ends of a sign-painting scaffold, the tensions in
the supporting ropes
A) are equal.
B) depend on the relative weights of Burl and Paul.
C) combine to equal zero.
D) are in equilibrium.
Food in a pressure cooker is cooked faster due to
A) higher temperature.
B) greater rate of bubble formation in the water.
C) energy transfer in the water.
D) all of the above
E) none of the above
The equivalent (combined) resistance of 1-ohm, 2-ohm, and 3-ohm in parallel is about
A) 0.06 ohm.
B) 1 ohm.
C) 1.8 ohms.
D) 6 ohms.
E) 9 ohms.
Red sunsets are due to light of lower frequencies that
A) are scattered from larger particles in the air.
B) are scattered from smaller particles in the air.
C) survive being scattered in the air.
D) are reflected by clouds and relatively large particles in the air.
E) appear reddish-orange to the eye.
Information-carrying nerves are connected to the retina at the
A) fovea.
B) blind spot.
C) cornea.
D) iris.
E) periphery.
One half second after starting from rest, a freely falling object will have a speed of
about
A) 2 m/s.
B) 5 m/s.
C) 10 m/s.
D) 20 m/s.
E) none of the above
Weigh yourself on a weighing scale and the scale shows your normal weight. If you
carefully stand on tiptoes, the scale reading will be
A) slightly more.
B) slightly less.
C) about half as much.
D) no different.
Which has more skin?
A) an elephant
B) a mouse
C) both the same
In Heisenberg's formula, △p △x≥ h, the symbolizes△
A) increase in.
B) decrease in.
C) change in.
D) uncertainty of.
E) certainty of.
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
Which of the following is fundamentally different from the others?
A) sound waves
B) X-rays
C) gamma rays
D) light waves
E) radio waves
Current in a conductor can be increased by
A) increasing the voltage across it.
B) reducing its resistance.
C) both of these
D) neither of these
The volume of water displaced by a floating 20-ton boat
A) is 20 cubic meters.
B) is the volume of 20 tons of water.
C) is the volume of the boat.
D) depends on the shape of the ship's hull.
E) none of the above
Before a thunder storm, clouds in the sky likely become
A) conducting.
B) polarized.
C) grounded.
D) a field-free region.
The nucleus that has the greatest mass per nucleon is
A) hydrogen.
B) iron.
C) lead.
D) uranium.
E) plutonium.
Blow on your hand with your mouth open. Then do the same with your lips puckered
and you'll find
A) a difference in temperatures.
B) the breath from puckered lips is cooler.
C) both of these
D) neither of these
The natural frequency of the atoms in glass is in the
A) infrared part of the spectrum.
B) visible part of the spectrum.
C) ultraviolet part of the spectrum.
The probability cloud for the electron in the hydrogen atom has an average radius
A) quite different from the radius predicted by Bohr.
B) in agreement with the orbital radius of Bohr.
C) as yet not accurately measured.
