A red-hot piece of coal will cool quicker in a
A) cold room.
B) warm over.
C) both the same.
In a circuit powered by a battery, charge
A) flows through the battery.
B) is energized by the battery.
C) both of these
D) neither of these
Stone slabs are stronger under
A) tension.
B) compression.
C) both of these
D) none of these
Molecules in a region of expanding air more often collide with neighboring molecules
that are
A) approaching.
B) receding.
C) nearly out of range.
Which of the following is a vector quantity?
A) area
B) volume
C) mass
D) none of the above
Artificially induced radioactive elements generally have
A) long half-lives.
B) short half-lives.
C) no half-lives.
The amount of heat needed to raise the temperature of 1 gram of water by 1oC is
A) 4.19 calories.
B) 4.19 Calories.
C) 4.19 joules.
D) none of the above
The main purpose of the condenser in the steam cycle of a steam turbine is to
A) cool the steam.
B) condense the steam.
C) lower pressure on the back side of the turbine blades.
D) maintain high efficiency.
E) change mechanical energy to electricity.
A fast-moving ball is more easily seen if it is
A) red.
B) orange.
C) yellow-green.
D) green-blue.
E) violet.
Stored potatoes, beets, and rutabagas in an unheated well-insulated room can be
protected from freezing by having in the room
A) blocks of foam plastic.
B) large tubs of water.
C) an ample supply of fire wood.
D) none of the above
A violet-hot star emits radiation having about twice the peak frequency of radiation
from a red-hot star. The surface temperature of the hotter star is about
A) half that of the cooler star.
B) twice that of the cooler star.
C) the same.
An electron and a baseball move at the same speed. Which has the longer wavelength?
A) the electron
B) the baseball
C) both the same
D) none of the above
Stand a broom upright on the end of its pole and let it topple to the floor. Repeat, but
with the bristles end on the floor. The faster fall will be the broom standing on its
A) pole-end.
B) bristles-end.
C) the same either way.
Suppose a particle is being accelerated through space by a 10-N force. Suddenly the
particle encounters a second force of 10 N in the opposite direction. The particle with
both forces acting
A) is brought to a rapid halt.
B) decelerates gradually to a halt.
C) continues at the speed it had when it encountered the second force.
D) theoretically tends to accelerate toward the speed of light.
E) none of the above
Which experiences the greatest electrical force in an electric field?
A) alpha particle
B) beta particle
C) electron
D) gamma ray
E) all the same
The complementary color of blue is
A) red.
B) green.
C) yellow.
D) cyan.
E) magenta.
The best time for digging clams (when the low tide is extra low) is during the time of
the
A) new or full moon.
B) half moon.
C) quarter moon.
D) none of the above
The loudness of a sound is most closely related to its
A) speed.
B) frequency.
C) wavelength.
D) intensity.
Galileo’s interpretation of motion differed from Aristotle’s in that Galileo emphasized
A) the acceleration of free fall.
B) rates of time.
C) the role of distance in describing motion.
D) none of the above
Tripling the linear size of an object multiplies its area by
A) 3 and its volume by 9.
B) 9 and its volume by 18.
C) 9 and its volume by 27.
D) 27 and its volume by 81.
E) none of the above
A block of ice sliding down an incline has half its maximum kinetic energy
A) at the top.
B) at the bottom.
C) halfway down.
D) need more information
Two objects of the same size, but unequal weights are dropped from a tall tower. Taking
air resistance into consideration, the object to hit the ground first will be the
A) lighter object.
B) heavier object.
C) Both hit at the same time.
D) not enough information
The rotational inertia of a pencil is greatest about an axis
A) along its length, where the lead is.
B) about its midpoint, like a propeller.
C) about its end, like a pendulum.
An iron rod becomes magnetic when
A) opposite ions accumulate at each end.
B) its atoms are aligned.
C) the net spins of many of its electrons are aligned.
D) its electrons stop moving and point in the same direction.
E) none of the above
A 5000-kg freight car collides with a 10,000-kg freight car at rest. They couple upon
collision and move at 2 m/s. What was the initial speed of the 5000-kg car?
A) 4 m/s
B) 5 m/s
C) 6 m/s
D) 8 m/s
E) none of the above
A fundamental rule of electricity is that
A) like kinds of charges repel.
B) unlike kinds of charges attract.
C) both of these
D) neither of these
An equal amount of 0oC air that is twice as hot has a temperature of
A) 0oC.
B) 64oC.
C) 100oC.
D) 273oC.
E) none of the above
An iron block in a furnace is heated and consequently expands, which means that its
density is
A) less.
B) the same.
C) more.
On a planet where atmospheric gases are red, distant dark mountains would appear
A) bluish.
B) greenish.
C) yellowish.
D) reddish.
E) untinted.
Melting snow tends to
A) warm the surrounding air.
B) cool the surrounding air.
C) neither of these
Neglecting air resistance, how fast must you toss a ball straight up in order for it to take
6 seconds to return to its initial level?
A) 5 m/s
B) 10 m/s
C) 20 m/s
D) 30 m/s
E) more than 30 m/s