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To illustrate regelation with ice it is important that a
A) wire is used.
B) string is used.
C) either of these
D) none of the above
If an object has twice as much mass as another, then it also has twice as much
1) acceleration.
2) weight.
3) center of gravity.
4) area.
This is because
5) of inertia.
6) mass and weight are directly proportional to each other.
7) the gravitational force acting on all objects in the same locality is the same.
A metal block has a density of 5000 kg per cubic meter and a volume of 2 cubic meters.
What is the block's mass?
A) 1000 kg
B) 2500 kg
C) 5000 kg
D) 10,000 kg
E) none of the above
Which horse moves faster in m/s on a merry-go-round?
A) one near inner rail
B) one near outer rail
C) both move at the same speed in m/s.
Water can be brought to a boil by
A) applying heat.
B) reducing air pressure on its surface.
C) both of these
D) neither of these
Compared to a sound of 30 decibels, the intensity of a sound of 60 decibels is
A) twice as intense.
B) 10 times as much.
C) 100 times as much.
D) 1000 times as much.
E) 10,000 times as much.
The buoyant force of the atmosphere on a body is equal to the
A) weight of air displaced.
B) volume of air displaced.
C) mass of the air displaced.
D) all of the above
E) none of the above
A changing electric field induces a changing
A) magnetic field.
B) electromagnetic field.
C) both of these
D) neither of these
Planets would crash into the Sun if it weren't for
A) their tangential velocities.
B) their vast distances from the Sun.
C) the inverse-square law.
D) their relatively small masses.
E) the fact that they are beyond the main gravitation of the Sun.
A galvanometer can be calibrated to measure
A) electric current.
B) electric voltage.
C) both of these
D) none of these
The cause of electrical shock is predominantly
A) excess current.
B) excess voltage.
C) reduced resistance.
D) none of the above
A proton and an electron are placed in an electric field. Which undergoes the greater
acceleration?
A) electron
B) proton
C) both accelerate equally.
D) none of the above
When ultraviolet light is incident upon glass, atoms in the glass
A) are forced into vibration.
B) resonate.
C) pass the light energy along practically undiminished.
D) freely absorb and re-emit most of the ultraviolet light.
While Debbie Diver holds her breath and swims deeper and deeper beneath the water's
surface, her density
A) increases.
B) decreases.
C) remains the same.
Surrounding every stationary electron is
A) a magnetic field.
B) an electric field.
C) both of these
D) neither of these
Solar power is commonly used to produce
A) heat.
B) electricity.
C) both of these
Angular momentum is greater for a satellite when it is at the
A) apogee (farthest point).
B) perigee (nearest point).
C) same at apogee and perigee
A 1-kg rock is suspended from the tip of a horizontal meterstick at the 0-cm mark so
that the meterstick barely balances like a seesaw when its fulcrum is at the 25-cm mark.
From this information, the mass of the meterstick is
A) 1/4 kg.
B) 1/2 kg.
C) 3/4 kg.
D) 1 kg.
E) none of the above
A substance that heats up relatively quickly has a
A) high specific heat capacity.
B) low specific heat capacity.
C) either of these
D) neither of these
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
If a volume of air is warmed, it expands and tends to
A) warm.
B) cool.
C) neither of these
If the temperature of a sample of water at 4oC is slightly increased, its volume
A) increases.
B) decreases.
C) remains the same.
The electrical force on a 2-C charge is 60 N. The electric field where the charge is
located is
A) 20 N/C.
B) 30 N/C.
C) 60 N/C.
D) 120 N/C.
E) 240 N/C.
Art museums use weaker wires than those used in homes because paintings in museums
A) are suspended by pairs of vertical wires.
B) are usually lighter in weight.
C) are more firmly attached.
A sound wave is a
A) longitudinal wave.
B) transverse wave.
C) all of the above
D) none of the above
Green light emitted by excited mercury vapor corresponds to an energy transition in the
mercury atom. A more energetic transition might emit
A) red light.
B) blue light.
C) white light.
D) any of these
If a magnet produces a force on a current-carrying wire, the wire
A) produces a force on the magnet.
B) may or may not produce a force on the magnet.
C) none of these
The radiation curve for a blue hot star peaks in the
A) infrared region.
B) red region.
C) yellow region.
D) ultraviolet region.
E) none of the above
Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools
by
A) conduction.
B) condensation.
C) evaporation.
D) melting.
If sunlight were green instead of white, the most comfortable color to wear on a cold
day would be
A) magenta.
B) yellow.
C) green.
D) blue.
E) violet.
Escape speed from the Sun is
A) about the same as from Earth.
B) very much greater than for Earth.
C) indefinite.
In order for an atom to decay to an element that is one greater in atomic number, it can
emit
A) one alpha particle and 3 beta particles.
B) one positron and 2 beta particles.
C) one beta particle.
D) all of the above
E) none of the above
An 800-N man stands at rest on two bathroom scales so that his weight is distributed
evenly over both scales. The reading on each scale is
A) 200 N.
B) 400 N.
C) 800 N.
D) 1600 N.
E) none of the above
If Burl carries Paul piggy-back while standing in the middle of a scaffold, the tensions
in the two supporting ropes would
A) cancel to zero.
B) be equal.
C) be in dynamic equilibrium.
D) more easily support Burl and Paul.
As water drops fall at a steady rate from a leaking faucet they
A) get closer together.
B) get farther apart.
C) remain at a relatively fixed distance from one another.
