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The part of the visible spectrum most absorbed by water is
A) infrared.
B) red.
C) cyan.
D) all about equally.
A diver shines light upward to the surface of a smooth pond at 20o to the normal. Most
light passes into the air above while the part that reflects back into the water makes an
angle to the normal of
A) less than 20o.
B) 20o.
C) more than 20o.
D) all refracts, none reflects.
An atom that emits light of a certain frequency is
A) not likely to absorb that same frequency.
B) an absorber of light of the same frequency.
C) fluorescent.
D) none of the above
A pair of helium nuclei fused together produces
A) helium isotope.
B) lithium.
C) beryllium.
D) carbon.
E) iron.
A friend says that changing electric and magnetic fields underlie the production of light.
A) agree with your friend
B) argue to the contrary with your friend.
C) find a new friend.
The energy source responsible for molecular motions in Earth's atmosphere is
A) their own natural kinetic energy.
B) pressure caused by the weight of air.
C) atmospheric tides.
D) the Sun.
A cannon recoils while firing a cannonball. The speed of the cannon's recoil is relatively
small because the
A) force against the cannon is smaller than against the ball.
B) momentum is mainly concentrated in the cannonball.
C) cannon has much more mass than the cannonball.
D) momentum of the cannon is smaller.
An apple weighs 1 N. When the apple is held at rest above your head, the net force on
the apple is
A) 0 N.
B) 0.1 N.
C) 1 N.
D) 9.8 N.
E) none of the above
Chromatic aberration is absent in
A) converging lenses
B) diverging lenses.
C) front surface plane mirrors.
A soda-pop can containing only steam is placed top downward in a pan of water. Whap!
The can is dramatically crushed by atmospheric pressure. The reduced pressure inside
the can is due to
A) contact with the relatively cooler water.
B) sudden slowing of the air and steam molecules inside.
C) condensation of steam inside.
D) reduced internal energy.
E) rapid conduction of heat to the relatively cool water.
When a car is struck by lightning, the resulting electric field inside the car is
A) normally huge, but for a brief time.
B) small enough to be safe for a passenger inside.
C) zero.
When you stand at rest on a pair of bathroom scales, the reading on each scale
A) is half your weight.
B) equals your weight.
C) add up to equal your weight.
If a fish in a pond looks upward at 50o to the normal, it will see
A) the pond's bottom.
B) the sky and possibly some tall surroundings.
C) only the water's surface.
D) none of the above
Which of the following involves passion, talent, and intelligence?
A) art
B) literature
C) music
D) science
E) all of the above
What must you do to get away from the harmful effects of radioactivity?
A) live at the North or South Poles.
B) go deep beneath Earth's surface.
C) go to the Moon.
D) die.
The force exerted on the tires of a car that directly accelerate it along a road is exerted
by the
A) engine.
B) tires.
C) air.
D) road.
E) none of the above
When you walk at an average speed of 4 m/s, in 5 s you'll cover a distance of
A) 2 m.
B) 10 m.
C) 15 m.
D) 20 m.
When a barrel of water in a rowboat in a swimming pool is poured overboard, the pool
level
A) rises.
B) falls.
C) remains unchanged.
Isaac Newton first became famous for his contributions to the understanding of
A) the laws of mechanics.
B) the law of gravity.
C) light.
A planet orbiting the Sun has speed v = √(GM/d). Escape speed from the Sun is v =
√v(2GM/d), where G is the gravitational constant, M is Sun's mass, and d is the distance
from the Sun. Noting that this tells us that escape speed is √2 times orbital speed, which
planet would fly out of the solar system by a 1.5 increase in orbital speed?
A) Mercury.
B) Venus.
C) Earth.
D) all of the above
E) none of the above
Fusing two carbon nuclei would occur with
A) absorption of energy.
B) release of energy.
C) neither of these
The main reason ocean tides exist is that Moon's pull is stronger
A) than the pull of the Sun.
B) on water closer to it than on water farther away.
C) on Earth's oceans than on Earth itself.
D) all of the above
A motorcycle of mass 100 kilograms slowly rolls off the edge of a cliff and falls for
three seconds before reaching the bottom of a gully. Its momentum upon hitting the
ground is
A) 1,000 kg m/s.
B) 2,000 kg m/s.
C) 3,000 kg m/s.
D) 4,000 kg m/s.
E) 9,000 kg m/.
Light travels slightly slower in the
A) upper atmosphere.
B) lower atmosphere.
C) neither of these
Compared to the ocean, Earth's atmosphere is different in that
A) its density varies with depth.
B) it has a less-distinct surface.
C) molecules are more greatly spaced.
D) all of the above
E) none of the above
To turn 50 grams of boiling water to steam requires
A) 50 calories.
B) 500 calories
C) 540 calories.
D) more than 540 calories.
E) none of the above
Why electrons don't spiral into atomic nuclei is best explained by their
A) particle nature.
B) wave nature.
C) both of these
D) neither of these
The circumference of a bicycle wheel is 2 meters. If it rotates at 1 revolution per second
then its linear speed is
A) 1 m/s.
B) 2 m/s.
C) 3 m/s.
D) 3.14 m/s.
E) 6.28 m/s.
Compared with the period of satellites in close Earth orbit, the period of satellites
orbiting far from Earth is
A) shorter.
B) the same.
C) longer.
D) need more information
Isolated bells ring clearly, while bells crammed in a box have a muffled ring. This is
analogous to light emitted by
A) a laser.
B) a fluorescent lamp.
C) an incandescent lamp.
D) a phosphorescent source.
E) none of the above
While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag,
its horizontal component of velocity
A) increases.
B) remains unchanged.
C) decreases.
For an isotope with a half-life of one day, at the end of three days the amount that
remains is
A) none.
B) one-half.
C) one-quarter.
D) one-eighth.
E) none of the above
The first evidence confirming the crystal structure of matter was
A) the citing of experiments by Nobel Prize-winning scientists.
B) testimonials by crystal-loving investigators.
C) X-ray diffraction patterns.
Each rolling wheel of a railroad train is tapered. Compared with the wide part, the
narrow part of the wheel has a tangential speed that is
A) less.
B) greater.
C) the same for both.
