A bare roof on a warmly heated home on a snowy day indicates
A) an unwanted flow of heat
B) poor insulation.
C) fairly good conductivity.
D) all of the above
The chef at the infamous Fattening Tower of Pizza tosses a spinning disk of uncooked
pizza dough into the air. The disk becomes wider during its flight, while its rotational
speed
A) remains constant.
B) quickens.
C) slows.
Important support for general relativity came from studies of the precession of the orbit
of
A) Mercury.
B) Venus.
C) Earth.
D) Mars.
E) asteroids.
A piece of glass that appears red
A) absorbs or reflects all colors except red.
B) transmits red.
C) both of these
D) neither of these
Which is the strongest fundamental force?
A) gravitational force.
B) electric force.
C) nuclear strong force.
D) none of the above
Compared to an empty ship, the same ship loaded with Styrofoam will float
A) higher in the water.
B) lower in the water.
C) at the same level in the water.
On a giant rotating turntable are two clocks, one at the center and the other at the
rim.The clock that runs slower is at
A) the center of the turntable.
B) the rim of the turntable.
C) either of these
A column that extends from sea level to the top of the atmosphere contains a certain
mass of air. If the column instead contained the same mass of water, its height would be
about
A) 3/4 meter.
B) 10.3 meters.
C) 5.6 kilometers.
D) none of the above
Radium (A = 88) transmutes to radon (A = 86) by
A) beta emission.
B) alpha emission.
C) gamma emission.
D) none of the above
The amount of gravitational force that acts on a space vehicle while in Earth orbit is
A) nearly zero.
B) nearly as much as the vehicle’s weight on Earth’s surface.
C) the same as the vehicle’s weight on Earth’s surface.
When a light beam emerges from water into air, light speed
A) increases.
B) decreases.
C) remains the same.
A seagull flying at 10 km/h in a 10-km/h crosswind has a resultant speed of
A) 10 km/h.
B) about 14 km/h.
C) 20 km/h.
D) more than 20 km/h.
How many octaves exist between 100 hertz and 1600 hertz?
A) 4
B) 5
C) 6
D) 7
E) 8
When the temperature of a solid block of ice is lowered, its volume
A) increases.
B) decreases.
C) stays the same.
To say there is no such thing as only one force means
A) there must also be a corresponding reaction force.
B) other forces, perhaps not evident, are there.
C) gibberish.
If an electric charge is shaken up and down frequently enough
A) sound can be emitted.
B) light can be emitted.
C) both of these
D) neither of these
A hologram is simply a
A) complex diffraction grating.
B) thin sheet of non-cubic transparent crystals.
C) pair of semi-crossed polarization filters.
D) thin photographic film with microscopic images over the entire surface.
E) none of the above
The speed of light in the void between molecules in glass is
A) more than its speed in a vacuum.
B) the same as its speed in a vacuum.
C) less than its speed in a vacuum.
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is
negligible the melon will return to its initial level with a kinetic energy of
A) less than 100 J.
B) more than 100 J.
C) 100 J.
D) need more information
If a Ping-Pong ball and a golf ball both move in the same direction with the same
amount of kinetic energy, the speed of the Ping-Pong ball must be
A) less than the golf ball.
B) more than the golf ball.
C) both the same
D) need more information
If the temperature of a sample of water at 4oC is slightly increased, its volume
A) increases.
B) decreases.
C) remains the same.
Two students engaged in a tug-of-war each pull a rope in opposite directions with a
force of 400 N. The net force on the rope is
A) zero and rope tension is 400 N.
B) zero and rope tension is 800 N.
C) 400 N and rope tension is 800 N.
D) 400 N and rope tension is also 400 N.
In a heat pump, cooling is accomplished when
A) condensation occurs in its coils.
B) vaporization occurs in its coils.
C) both of these
D) neither of these
Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the
ground with 100 J of kinetic energy. If he were to instead throw the ball straight
upward, it will soon reach the ground with a kinetic energy of
A) less than 100 J.
B) 100 J.
C) more than 100 J.
A strong spring is stretched 10 cm by a suspended block. If the block’s weight is
doubled, the spring will stretch to
A) 15 cm.
B) 20 cm.
C) 40 cm.
D) its elastic limit.
The main source of Earth’s natural heat is
A) molten-hot lava.
B) pressure on Earth’s interior.
C) radioactivity in Earth’s interior.
D) solar energy in the form of fossil fuels.
The first to be credited with the idea that energy was quantized was
A) Max Planck.
B) Albert Einstein.
C) both Planck and Einstein at about the same time.
If a 10oC piece of iron is heated until it has twice as much internal energy, its
temperature will be
A) 20oC.
B) 273oC.
C) 293oC.
D) 566oC.
E) none of the above
A ball that gains speed as it rolls down a hill experiences a
A) net torque.
B) net force.
C) both of these
D) neither of these
When the tiny hole in a pinhole camera is made larger, the image is
A) brighter but less clear.
B) clearer.
C) right-side up.
D) none of the above
If a star that is 10 light-years away from Earth explodes, gravitational waves from the
explosion will reach Earth in
A) less than 10 years.
B) more than 10 years.
C) 10 years.
The kinetic energy of a planet is maximum when it is
A) closest to the Sun.
B) farthest from the Sun.
C) least accelerating.
D) none of the above
If you shine a flashlight from one wall to an opposite wall inside a spaceship drifting
without acceleration far from gravitational influences, the beam of light will travel
A) in a straight-line path.
B) in a parabolic path.
C) along the arc of a circle.