A message from relativity theory is that slowing the aging process
A) can occur with correct applications of physics.
B) would occur if you fell into a bottomless mine shaft.
C) can only happen to “the other guy.”
On each given day and location, tides rise and fall at
A) about the same time.
B) exactly the same time.
C) different times.
D) ever increasing rates daily.
If you double the net force on an object, you’ll double its
A) acceleration.
B) speed.
C) velocity.
D) all the above
Firefighters find that the temperature of burning material is best lowered when water is
A) used in small amounts.
B) pointed away from the flames.
C) sprayed as a fine mist.
D) salted.
The output power of an ideal transformer is
A) greater than the input power.
B) equal to the input power.
C) smaller than the input power.
D) may be any of the above
In gravitational red shift, the quantity that undergoes a red shift is
A) spacetime curvature.
B) wave direction.
C) field intensity.
D) wave frequency.
E) none of the above
When a load is placed on the middle of a horizontal beam supported at each end, the
bottom part of the beam undergoes
A) tension.
B) compression.
C) either of these
D) none of these
In Heisenberg’s formula, △p △x≥ h, the symbolizes△
A) increase in.
B) decrease in.
C) change in.
D) uncertainty of.
E) certainty of.
You can add heat without raising temperature to
A) ice.
B) boiling water.
C) both of these
D) neither of these
A setting Sun appears red due to
A) scattering of lower frequencies by larger particles in the air.
B) light’s longer path through air at sunset.
C) lower frequencies of light emitted during sunset.
D) absorption by smaller particles in the air.
A freight train rolls along a track with considerable momentum. If it rolls at the same
speed but has twice as much mass, its momentum is
A) zero.
B) twice.
C) four times as much.
D) unchanged.
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.
When red, green, and blue lights shine on a golf ball, the shadows cast are
A) red, green, and blue.
B) black.
C) magenta, cyan, and yellow.
D) none of the above
When a pair of identical lamps are connected in parallel
A) voltage across each is the same.
B) current in each is the same.
C) power dissipated in each is the same.
D) all of the above
The support force on a 10-N book at rest on a table is
A) slightly less than 10 N.
B) 10 N.
C) slightly greater than 10 N.
D) dependent on the position of the book.
A weightless spring is stretched 10 cm by a suspended 1-kg block. If two such springs
are used to suspend the block, one spring above the other, to effectively provide one
double-length spring, then the total stretch of the double-length spring will be
A) 5 cm.
B) 10 cm.
C) 20 cm.
D) 30 cm.
E) none of the above
If an electric toaster rated at 110 V is accidently plugged into a 220-V outlet, the current
drawn by the toaster will be
A) half its normal value.
B) the same as its normal value.
C) twice its normal value.
D) none of the above
The strength of a beam is most related to its
A) cross section.
B) length.
C) both of these
Which of these sounds characterize “white noise”?
A) surf
B) rustling leaves
C) bubbling water
D) all of the above
E) none of the above
Heat normally flows from objects of high
A) internal energy to objects of low internal energy.
B) temperature to objects of low temperature.
C) both of these
D) neither of these
The accelerations possible for a ball on an inclined plane
A) range from zero to g.
B) range from g to infinity.
C) have no limit.
Two identical golf carts move at different speeds. The faster cart has twice the speed
and therefore has
A) twice the kinetic energy.
B) four times the kinetic energy.
C) eight times the kinetic energy.
D) none of the above
A pair of toy freight cars, one twice the mass of the other, fly apart when a compressed
spring that joins them is released. Acceleration will be greater for the
A) heavier car.
B) lighter car.
C) same on each.
Pumice is a volcanic rock that floats, which means its density is
A) less than the density of water.
B) equal to the density of water.
C) more than the density of water.
D) need more information.
All events and all things exist in “the spacetime continuum” with coordinates
A) of distances in three dimensions.
B) of time.
C) both of these
D) none of these
When light passes through common windowpane, its angle of emergence is
A) usually less than its angle of incidence.
B) always less than its angle of incidence.
C) the same as its angle of incidence.
D) usually more than its angle of incidence.
E) always more than its angle of incidence.
An astronaut floating alone in outer space throws a baseball. If the ball moves away at
20 m/s, the astronaut will
A) move in the opposite direction at 20 m/s.
B) move in the opposite direction at a lower speed.
C) move in the opposite direction at a higher speed.
D) none of the above
If the specific heat of water were lower than it is, ponds in the cold of winter would be
A) more likely to freeze.
B) less likely to freeze.
C) neither more nor less likely to freeze.
Joshua is attracted toward Earth by a 500-N gravitational force. The Earth is attracted
toward Joshua with a force of
A) zero.
B) 250 N.
C) 500 N.
D) 1000 N.
A circus diver drops from a high pole into water far below. When he is halfway down
A) his potential energy is halved.
B) he has gained an amount of kinetic energy equal to half his initial potential energy.
C) his kinetic energy and potential energy are equal.
D) all of the above
E) none of the above
The greater efficiency achieved with the curved blades of a Pelton wheel is due to
A) bouncing.
B) greater time of water impact.
C) rotational momentum.
D) divided impulse.
Two charged particles held a certain distance apart are released. As they move, the force
on each particle increases. Therefore, their charges have
A) the same sign.
B) opposite signs.
C) the same mass.
D) the same size.
E) need more information