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Wood does not have magnetic properties because it contains no
A) iron or other metals.
B) magnetic domains.
C) moving electrons.
D) none of the above
The fact that gasoline overflows a full tank on a hot day is evidence that
A) gasoline expands more with increasing temperature than its tank.
B) the tank contracts while gasoline expands with temperature.
C) both of these
D) neither of these
Chromatic aberration is absent in
A) converging lenses
B) diverging lenses.
C) front surface plane mirrors.
A projectile is launched from ground level at 15o 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
In practice, a good insulator
A) stops heat flow.
B) slows heat flow.
C) speeds negative heat flow.
D) all of the above
To save energy while you leave your warm house for a half hour on a cold day, turn the
thermostat
A) down.
B) up.
C) to room temperature.
According to Kepler, the orbital period of a planet is directly proportional to the
A) planet's average distance from the Sun.
B) square of the planet's average distance from the Sun.
C) cube of the planet's average distance from the Sun.
Compared with a force, a torque involves
A) rotation.
B) leverage.
C) distance from an axis of rotation.
D) all the above
Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave
received at 100 megahertz is
A) 0.3 m.
B) 3.0 m.
C) 30 m.
D) 300 m.
E) none of the above
Solar power is the rate at which
A) the Sun emits energy.
B) solar energy is received from the Sun.
C) the atmosphere absorbs energy.
D) all of the above
E) none of the above
The force of gravity acting on you will increase if you
A) burrow deep inside Earth.
B) stand on a planet with a shrinking radius.
C) both of these
D) neither of these
The pair of protons in the nucleus of a helium atom
A) attract a pair of orbiting electrons.
B) repel orbiting electrons.
C) both of these
D) neither of these
The airspeed of an airplane is 200 km/h. When it is caught in a 200-km/h crosswind, its
speed across the ground below is
A) 0 km/h.
B) 200 km/h.
C) 283 km/h.
D) 400 km/h.
E) 1600 km/h.
A mirage occurs for road surfaces that are most often
A) hot.
B) cold.
C) wet.
D) hard.
E) snowy.
Suppose you put a chocolate layer on pieces of candy. Compared with the amount of
chocolate used to cover 1 pound of large pieces, if you cover 1 pound of smaller pieces
you'll use
A) less chocolate.
B) the same amount of chocolate.
C) more chocolate.
D) makes no difference
As you approach a steady light source, the wavelength of the emitted light appears
A) longer.
B) shorter.
C) the same.
Inside an accelerating spaceship far from gravitational influences, a flashlight beam will
A) not bend.
B) curve as it would in a gravitational field equal to the acceleration of the spaceship.
C) follow a semi-circular path.
The nucleus having the most tightly bound nucleons is
A) hydrogen.
B) iron.
C) lead.
D) uranium.
E) plutonium.
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