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Nellie tosses a ball upward at an angle. Neglecting air resistance, the horizontal
component of the initial velocity
A) decreases with time.
B) remains constant.
C) increases with time.
The frequency of the second hand on a clock is
A) 1 hertz.
B) 1/60 hertz.
C) 60 hertz.
An apple pie will be a net emitter of energy when its temperature is
A) higher than its surroundings.
B) lower than its surroundings.
C) none of these
Fermat's principle could be the principle of least distance for
A) reflection.
B) refraction.
C) both of these
D) neither of these
Minimal orbit speed about Earth is about 8 km/s, and about Jupiter is
A) less than 8 km/s.
B) more than 8 km/s.
C) about 8 km/s.
What approximate weight of air is in a column 1-cm2 in cross section that extends from
sea level to the top of the atmosphere?
A) 0.01 N
B) 10 N
C) 100 N
D) 1000 N
The source of a sonic boom may be a
A) whip.
B) a high-speed bullet.
C) both of these
D) neither of these
The white light emitted by a fluorescent lamp is provided by the
A) mercury vapor in the lamp.
B) phosphors on the inner surface of the lamp.
C) high temperature of the glowing gas.
D) filtering effect of the glass tubing.
Colors seen on some TV screens result from color
A) addition.
B) subtraction.
C) either of these
D) neither of these
The conservation of momentum is most closely related to
A) Newton's 1st law.
B) Newton's 2nd law.
C) Newton's 3rd law.
D) Newton's law of gravity
Two identical arrows, one with twice the kinetic energy of the other, are fired into a bale
of hay. Compared with penetration of the slow arrow, the faster arrow penetrates
A) the same distance.
B) twice as far.
C) four times as far.
D) more than four times as far.
E) none of the above
A boy scout will be burned more severely by
A) 100 g of water at 100C.
B) 100 g of steam at 100C.
C) both about equally
D) neither of these
According to special relativity, tomorrow's travelers can travel
A) only forward in time.
B) backward in time.
C) both forward and backward in time.
If the elliptical orbit of Mercury were more eccentric, its precession rate would be
A) larger.
B) smaller.
C) the same.
D) nonexistent.
If bits of the coals do not stick to your feet while walking barefoot on red-hot coals, it
would be best if your feet are
A) wet.
B) dry.
C) warm.
D) cold.
E) very hot.
You can safely stand on the overhanging end of a heavy plank that rests on a table. How
much overhang depends on your mass and the plank's mass. If you can stand on the end
of a plank that overhangs the edge of the supporting table 1/4 its total length, how
massive is the plank compared to your mass?
A) 1/2
B) the same
C) 1 and 1/2 times
D) twice
E) 4 times
An aurora borealis high above the atmosphere is due to
A) disturbances in Earth's magnetic field.
B) fountains of high-speed charged particles.
C) trapping of charged particles by Earth's magnetic field.
D) all of the above
Lillian sees a chair at the Exploratorium that has been scaled up by three. In attempting
to lift it, she finds the chair is
A) three times as heavy.
B) six times as heavy.
C) nine times as heavy.
D) more than nine times as heavy.
The first scientist to introduce the concept of inertia was
A) Aristotle.
B) Galileo.
C) Newton.
D) Copernicus.
After rolling halfway down an incline, a marble's kinetic energy is
A) less than its potential energy.
B) greater than its potential energy.
C) the same as its potential energy.
When Philadelphia's temperature is 40F and Miami's temperature is 80F,
A) Miami is twice as hot as Philadelphia.
B) Miami is warmer than Philadelphia.
C) both of these
D) neither of these
In a spaceship that accelerates at g far from gravitational influences, with the effort it
takes on Earth to do 20 pushups, you could comfortably do
A) less than 20 pushups.
B) 20 pushups.
C) more than 20 pushups.
The strings in musical instruments that have greater mass tend to produce notes of
A) higher frequency.
B) lower frequency.
C) the same frequency.
D) none of the above
Faraday's law underlies the operation of
A) an electric guitar.
B) a shake flashlight.
C) the changing of traffic lights.
D) all of the above
E) none of the above
The electric field around an isolated electron has a certain strength 1 cm from the
electron. The electric field strength 2 cm from the electron is
A) half as much.
B) the same.
C) twice as much.
D) four times as much.
E) none of the above
If no external forces act on a moving object, it will
A) continue moving at the same speed.
B) move slower and slower until it finally stops.
C) come to an abrupt halt.
D) none of the above
Which pulls on the oceans of Earth with a greater force?
A) Moon
B) Sun
C) both pull the same.
Free protons and neutrons are spewed throughout the atmosphere by
A) nitrogen decay.
B) carbon decay.
C) the bombardment of cosmic rays upon atoms.
D) all of the above
E) none of the above
A changing electric field induces a changing
A) magnetic field.
B) electromagnetic field.
C) both of these
D) neither of these
The lift experienced by Maglev trains is due to magnetic
A) attraction.
B) repulsion.
C) dipoles.
The number of protons in a neutral atom is balanced by an equal number of
A) electron shells that surround the nucleus.
B) neutrons in the nucleus.
C) orbital electrons.
D) none of the above
Electrostatics is a branch of electricity that focuses on
A) electrical charge.
B) electrical force.
C) both of these when static.
D) none of the above
A projectile is fired into the air at an angle of 50 above ground level and hits a target
downrange. It will also hit the target if fired at an angle of
A) 40.
B) 45.
C) 55.
D) 60.
E) none of the above
The whiteness of clouds, unlike the blueness of the sky, primarily involves
A) medium sized particles.
B) reflection and refraction of sunlight.
C) seeds upon which condensation of cloud material forms.
D) water prisms.
