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A galvanometer indicates
A) electric charge.
B) a flow of electrons.
C) electric voltage.
D) magnetic field strength.
When a cannonball is fired from a cannon, which undergoes the greater acceleration?
A) the cannonball
B) the recoiling cannon
C) both the same
For absorption spectra to exist
A) the light source must be a gas.
B) partially absorbent material must exist between the light source and the spectroscope
slit.
C) the spectroscope must be equipped with an absorption cell.
D) all of the above
E) none of the above
Applying E = hf to photon emission from an atom, the symbol E represents the energy
A) of the emitted photon.
B) difference between atomic energy levels producing the photon.
C) both of these
D) neither of these
A certain radioactive isotope placed near a Geiger counter registers 120 counts per
minute. If the half-life of the isotope is one day, what will be the count rate at the end of
four days?
A) 30 counts/min
B) 15 counts/min
C) 10 counts/min
D) 7.5 counts/min
E) 5 counts/min
The speed of sound depends on
A) its frequency.
B) its amplitude.
C) the medium in which it travels.
D) all of the above
E) none of the above
When an ideal gas is subjected to an adiabatic process
A) no work is done on the gas.
B) the temperature of the gas does not change.
C) the internal energy of the gas does not change.
D) all of the above
E) none of the above
Eratosthenes' measurements of Earth's size involved
A) a deep well in Syene.
B) a pillar's shadow in Alexandria.
C) surveying the distance between Alexandria and Syene.
D) all of the above
If an object has twice as much mass as another, then it also has twice as much
1) acceleration.
2) weight.
3) center of gravity.
4) area.
This is because
5) of inertia.
6) mass and weight are directly proportional to each other.
7) the gravitational force acting on all objects in the same locality is the same.
Wave interference occurs in
A) transverse waves.
B) longitudinal waves.
C) both of the above
D) none of the above
A miracle car with a 100% efficient engine burns fuel having a 40-megajoules-per-liter
energy content. If air drag and overall frictional forces at highway speeds totals 1000 N,
what distance per liter can be achieved on the highway?
A) 30 km
B) 40 km
C) 50 km
D) more than 50 km
E) need more information
Light is reflected when
A) electron clouds of atoms are energized.
B) atomic nuclei are made to vibrate.
C) incident light is returned into the medium from which it came.
D) electromagnetic waves emanate from matter.
Interference colors in a soap bubble is evidence that the soap film
A) has two reflecting surfaces.
B) is thin.
C) both of these
D) neither of these
A pair of toy freight cars, one twice the mass of the other, fly apart when a compressed
spring that joins them is released. The spring exerts the greater force on the
A) heavier car.
B) lighter car.
C) same on each.
Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the same
direction. Jake's speed relative to the ground is
A) 6 m/s.
B) 10 m/s.
C) 14 m/s.
D) none of the above
A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency
of the machine is
A) 10%.
B) 50%.
C) 90%.
D) 110%.
E) none of the above
The type of lens that brings parallel light rays together is a
A) converging lens.
B) diverging lens.
C) combination of converging-diverging lens.
For electric current in the home, your power company supplies
A) energy.
B) electrons.
C) both of these
D) neither of these
The minimum number of forces that act on a book resting on a table is
A) 1.
B) 2.
C) 3.
D) 4.
E) none of the above
The bell with the highest natural frequency is relatively
A) small.
B) large.
C) either of these
We do not observe tides in a community swimming pool because
A) gravitation on the small mass of water is negligibly small.
B) it is shallow compared to the ocean.
C) all parts of it are practically the same distance from the Moon.
D) they are masked by the much stronger pull of Earth gravity.
E) the tides are only observed at night.
When a gas in a container expands to twice its volume, its density
A) halves.
B) doubles.
C) quadruples.
D) remains the same.
Marshmallows in a vacuum become
A) larger.
B) smaller.
C) flat.
D) a hollow shell.
E) none of the above
When oxygen and hydrogen gases combine, the result is
A) water.
B) methane.
C) a noble gas.
A ball rolls along a horizontal track in a certain time. If the track has a dip in it, the time
to roll the length of the track will be
A) less.
B) the same.
C) more.
A painting looks less flat when viewed with
A) one eye.
B) both eyes.
C) Polaroid glasses.
A positive charge and a negative charge held a certain distance apart are released. As
they move, the force on each particle
A) increases.
B) decreases.
C) stays the same.
A firecracker bursts while freely falling. The combined momentum of its fragments
A) equals the momentum of the firecracker at the time of burst
B) cancels to the firecracker's momentum at the time of bursting.
C) cancels to zero.
D) none of the above
If molecules in the sky scattered orange light instead of blue light, sunsets would be
colored
A) orange.
B) yellow.
C) green.
D) blue.
E) none of the above
The pressure at the bottom of a jug filled with water does NOT depend on
A) the acceleration due to gravity.
B) water density.
C) the height of the liquid.
D) surface area of the water.
E) none of the above
Phil leans over the edge of a cliff and throws a rock upward at 5 m/s. Neglecting air
resistance, two seconds later the rock's speed is
A) zero.
B) 5 m/s.
C) 10 m/s.
D) 15 m/s.
E) none of the above
A nuclear power plant is very similar to
A) nuclear bombs, but with more control.
B) any conventional power plant, but with uranium as fuel.
C) a photovoltaic solar cell power plant.
D) all of the above
E) none of the above
If a compass is moved from the Northern Hemisphere to the Southern Hemisphere, its
magnetic needle will change direction
A) randomly and rapidly
B) by 90 degrees.
C) by 180 degrees.
D) hardly at all.
Which of these does NOT have an electrical charge?
A) proton
B) electron
C) neutron
D) all of the above
E) none of the above
