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If the elliptical orbit of Mercury were more eccentric, its precession rate would be
A) larger.
B) smaller.
C) the same.
D) nonexistent.
A hockey puck sliding across the ice finally comes to rest because
A) it seeks its proper and natural state.
B) of friction.
C) that's just the way it is.
A push on a 1-kg brick accelerates it. Neglecting friction, equally accelerating a 10-kg
brick requires
A) just as much force.
B) 10 times as much force.
C) 100 times as much force.
D) one-tenth the amount of force.
E) none of the above
A common naturally-polarized bit of matter is
A) an electron.
B) a hydrogen atom
C) a water molecule.
D) all of the above
E) none of the above
The calories needed to change 10 grams of ice at 0oC to steam at 100oC is
A) 6200.
B) 6400.
C) 7200.
D) 8000.
E) none of the above
When you touch a hot potato with your finger, energy flows
A) from your finger to the potato.
B) from the potato to your finger.
C) actually, both ways.
No work is done by gravity on a bowling ball that rolls along a bowling alley because
A) no force acts on the ball.
B) little distance is covered by the ball.
C) the force on the ball is at right angles to the ball's motion.
D) the ball's speed remains constant.
If gravity between the Sun and Earth suddenly vanished, Earth would continue moving
in
A) a curved path.
B) an outward spiral path.
C) an inward spiral path.
D) a straight-line path.
A paint pigment that absorbs red light and gives off blue light
A) is fluorescent.
B) is phosphorescent.
C) is used in lasers.
D) is polarized.
E) doesn't exist.
Discrete spectral lines are observed when excitation occurs in a
A) solid.
B) liquid.
C) gas.
D) superconductor.
E) all of the above
In looking at yourself in a steamy mirror you wipe just enough moisture away to barely
see a full view of your face. If you move back from the mirror you'll see
A) a bit more of your face.
B) a bit less of your face.
C) the same amount of your face.
Polarization is a property of
A) transverse waves.
B) longitudinal waves.
C) both of these
D) neither of these
A golf ball is thrown at and bounces backward from a massive bowling ball that is
initially at rest. After the collision, compared to the golf ball, the bowling ball has more
A) momentum, but less kinetic energy.
B) kinetic energy, but less momentum.
C) momentum and more kinetic energy.
D) need more information
Earth satellites are typically more than 100 km high so as to be above Earth's
A) atmosphere.
B) gravitational field.
C) both of these
As a spaceship moving toward you at half the speed of light fires a probe toward you,
relative to itself at 0.7 the speed of light, you see the probe approaching at about
A) 0.70c.
B) 0.87c.
C) 0.89c.
D) 0.92c.
E) 0.96c.
An electroscope is charged positively as indicated by foil leaves that stand apart. As a
negative charge is brought close to the electroscope, the leaves become
A) closer together.
B) farther apart.
C) motionless.
How far must one travel to escape Earth's gravitational field?
A) to a region above Earth's atmosphere
B) to a region well beyond the Moon
C) to a region beyond the solar system
D) forget it; you can't travel far enough.
If you move a clock from Earth to the Moon, the clock runs
A) slower.
B) no differently.
C) faster.
Sometimes the current in lamps is too feeble to produce glowing of the lamp filaments,
which occurs when
A) too many lamps are connected in series.
B) too many lamps are connected in parallel.
C) too much current is drawn by the battery.
If a satellite travels at constant speed at all points in its orbit, then its path is
1) a circle.
2) an ellipse.
3) a parabola.
It travels at constant speed because
4) the net force acting on the satellite is zero.
5) it is characteristic for a satellite to travel at constant speed in this type of orbit.
6) gravitational force decreases with increasing distance.
7) there is no component of gravitational pull directed along the satellite's path.
8) of inertia.
Sustained energy output by fusion is a daily occurrence in
A) military installations.
B) breeder reactors.
C) the Sun.
D) Earth's interior.
Fissioning an iron nucleus would occur with
A) absorption of energy.
B) release of energy.
C) neither absorption nor release of energy
You photograph the image of your little sister, who stands 2 meters in front of a plane
mirror. Holding the camera beside her head, the distance to her image is
A) 1 meter.
B) 2 meters.
C) 3 meters.
D) 4 meters.
E) none of the above
A skydiver's terminal velocity will be greatest if she falls
A) head first.
B) lying flat on her back.
C) lying flat on her stomach.
D) with her parachute open.
Which is not a color?
A) yellow-green
B) black
C) both of these
D) neither of these
Solar winds headed in Earth's direction are deviated mainly by
A) the upper atmosphere.
B) the troposphere.
C) Earth's magnetic field.
D) Earth's radiation belts.
A freely-falling watermelon falls with constant
A) velocity.
B) speed.
C) acceleration.
D) distances each successive second.
A piano tuner knows that a key on the piano is tuned to the frequency of a test tuning
fork when the fork and key struck at same time produce beats of
A) 0 Hz.
B) 1 Hz.
C) 2 Hz.
D) 3 Hz.
E) 4 Hz.
To pluck a nucleon from a nucleus requires
A) work.
B) kinetic energy.
C) potential energy.
D) none of the above
Terrestrial radiation is
A) emitted by Earth.
B) emitted by the Sun.
C) both of these
D) neither of these
A block is dragged without acceleration in a straight-line path across a level surface by
a force of 6 N. What is the force of friction between the block and the surface?
A) less than 6 N
B) 6 N
C) more than 6 N
D) need more information
