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All deposits of natural uranium contain appreciable amounts of
A) iron.
B) lead.
C) gold.
D) all of the above
E) none of the above
In which is the temperature greater?
A) boiling-hot tea in a cup
B) boiling-hot tea in a fire-engine pail
C) both the same
The frequency of a certain wave is 10 hertz and its period is
A) 0.1 second.
B) 10 seconds.
C) 100 seconds.
D) none of the above
For an isotope with a half-life of one day, at the end of two days the amount that
remains is
A) none.
B) one-half.
C) one-quarter.
D) one-eighth.
E) none of the above
When Peter tosses an egg against a sagging sheet, the egg doesn't break due to
A) reduced impulse.
B) reduced momentum.
C) both of these
D) neither of these
Escape speed from Mars is
A) about the same as from Earth.
B) greater than from Earth.
C) less than from Earth.
About how high can water at sea level be theoretically lifted by a vacuum pump?
A) less than 10.3 m
B) 10.3 m
C) more than 10.3 m
Which of these vary for satellites in elliptical orbits?
A) speed.
B) momentum.
C) kinetic energy.
D) all of the above
E) none of the above
A simple method of measuring the distance between the Earth and the Moon is to place
in your line of sight to the Moon a
A) magnifying glass.
B) coin.
C) telescope.
D) meterstick.
When a cannon is fired, it recoils as the cannonball is set in motion. The cannon and
cannonball ideally acquire equal
A) but opposite amounts of momentum.
B) amounts of kinetic energy.
C) both of these
D) neither of these
Buoyant force is greater on a submerged 1-cubic centimeter block of
A) lead.
B) aluminum.
C) same on each
The time it takes a projectile fired straight up at 10 m/s to reach the top of its path is
about
A) 1 s.
B) 2 s.
C) 10 s.
D) not enough information
An excited atom is an atom
A) with excess vibration.
B) with one or more displaced electrons.
C) with more protons than electrons.
D) that is frantic.
A ball rolling down an incline has its maximum kinetic energy at
A) the top.
B) halfway down.
C) three-quarters of the way down.
D) the bottom.
Which is the lightest particle?
A) proton
B) electron
C) neutron
D) all about the same
The most disorderly arrangement of energy within matter is also
A) the least probable state of matter.
B) the most probable state of matter.
C) a matter of certainties, not probabilities.
D) none of the above
When current reverses direction in a wire, the surrounding magnetic field
A) also reverses direction.
B) becomes momentarily stronger.
C) contracts.
D) expands.
If the Sun became twice as massive, your attraction to the Sun would double and your
weight as measured on Earth would
A) double.
B) quadruple.
C) not change.
Facts in the field of science
A) are absolute.
B) are changeable.
C) mean very little.
D) are more important than theories.
The conventional direction of magnetic field lines outside a magnet are from
A) north to south.
B) south to north.
C) either way
Suzie Skydiver, who weighs 500 N, reaches terminal velocity of 90 km/h. The air
resistance on Suzie is then
A) 90 N.
B) 250 N.
C) 410 N.
D) 500 N.
E) none of the above
We are actually looking into the past when we look at
A) a distant star.
B) our physics book.
C) actually both of these
D) none of the above
The energy output of a typical nuclear reactor is via
A) heating water to form steam.
B) directing steam to a turbine.
C) spinning a turbine to generate electricity.
D) all of the above
E) none of the above
What is the force of gravity on a 500-N woman standing on Earth's surface?
A) 50 N
B) 250 N
C) 500 N
D) 5000 N
E) none of the above
Detonation of a fusion-type hydrogen bomb begins by
A) splitting uranium.
B) pressing together pieces of uranium.
C) igniting a fission bomb.
D) all of the above
E) none of the above
Light of different colors in a vacuum travel at
A) different speeds.
B) the same speed.
C) the same speed in both a vacuum and all materials.
Light at the peak frequency of an incandescent lamp depends on the
A) amount of electrical energy transformed.
B) rate of atomic and molecular vibrations.
C) voltage applied to the lamp.
D) electrical resistance of the lamp.
E) transparency of glass.
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.
The current produced by a common generator is
A) dc.
B) ac.
C) neither of these
Nellie's weight and normal force usually have the same magnitude when she stands on a
A) horizontal surface.
B) inclined surface.
C) either a horizontal or inclined surface.
To say that an object becomes electrically polarized means that
A) it is electrically charged.
B) its charges have been rearranged.
C) its internal electric field is zero.
D) it is only partially conducting.
E) none of the above
When waves from a pair of closely-spaced slits arrive in phase
A) a bright fringe is produced.
B) a dark fringe is produced.
C) both bright and dark fringes are produced.
D) none of the above
The round spots of light on the ground beneath a tree on a sunny day are images of
A) the openings between leaves above.
B) nothing in particular.
C) the Sun.
