When water is turned on in a shower, the shower curtain moves towards the water
spray. This partly involves
A) capillary action.
B) surface tension.
C) pressure changes in moving fluids.
D) none of the above
Interference is a property of
A) sound waves.
B) water waves.
C) light waves.
D) all of the above
E) none of the above
Compared to clocks in a stationary reference frame, clocks in a moving reference frame
run
A) slower.
B) faster.
C) at the same rate.
An astronaut at Earth’s surface has a mass of 50 kg and a weight of 500 N. If she were
floating freely inside a space habitat in remote space, she would have
A) no weight and less mass.
B) no weight and the same mass.
C) more weight and no mass.
D) none of the above
Electric resistance in our skin is lowered when our skin is
A) moist.
B) dry.
C) none of the above
When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard,
the speed of the skateboard
A) decreases.
B) increases.
C) neither decreases nor increases.
Just as in hydraulic circuits there is water pressure, in electric circuits there is
A) current.
B) voltage.
C) resistance.
A bullet fired horizontally from a rifle begins to fall
A) as soon as it leaves the barrel.
B) after air friction reduces its speed.
C) neither of these
A white boat sunk in water where sunlight is dim appears
A) red.
B) yellow.
C) cyan.
D) no color”black.
The mass of a lamb that weights 110 N is about
A) 1 kg.
B) 11 kg.
C) 110 kg.
D) 1100 kg.
E) none of the above
To “spear” a red fish with a red laser beam and compensate for refraction, aim your
laser
A) directly at the sighted fish.
B) above the sighted fish.
C) below the sighted fish.
An Earth satellite is simply a projectile
A) freely falling around Earth.
B) floating motionless in space near Earth.
C) approaching Earth from outer space.
When the Sun shines on the Moon, the Moon casts a shadow
A) at all times.
B) that is tapered.
C) that sometimes falls on Earth.
D) all of the above
When the nucleus of an atom emits only a gamma ray, the atom’s atomic number
A) decreases.
B) remains unchanged.
C) increases.
Power is defined as the energy expended per unit of time. When translated to electrical
terms, power is equal to
A) current multiplied by resistance.
B) current multiplied by voltage.
C) current divided by time.
D) voltage divided by time.
E) none of the above
Galileo taught us that if you roll a ball along a level surface it will
A) soon slow down due to its natural place.
B) keep rolling if friction is absent.
C) roll as long as its inertia nudges it along.
D) soon roll in the opposite direction.
During an adiabatic compression of an ideal gas
A) the internal energy of the gas remains constant.
B) the temperature of the gas does not change.
C) no heat enters or leaves the gas.
D) no work is done on the gas.
E) none of the above
The net force exerted on a car traveling in a circular path at constant speed is
A) directed forward, in the direction of travel.
B) directed toward the center of the curve.
C) zero because the car is not accelerating.
D) none of the above
According to Einstein, events that are simultaneous in one frame of reference
A) are simultaneous in all frames of reference.
B) are not simultaneous in other frames of reference.
C) may or may not be simultaneous in other frames of reference.
A mixture of red and green pigments appears
A) orange.
B) yellow.
C) magenta.
D) blue.
E) muddy-brown.
Discrete spectral lines are observed when excitation occurs in a
A) solid.
B) liquid.
C) gas.
D) superconductor.
E) all of the above
Spectral lines for an element are often in the
A) infrared region.
B) ultraviolet region.
C) both of these
D) neither of these
Which of the following is NOT a compound?
A) air
B) ammonia
C) water
D) salt
E) all are compounds
Like kinds of magnetic poles repel while unlike kinds of magnetic poles
A) attract.
B) repel also.
C) may attract or repel.
The photons having greatest energy are those of
A) infrared.
B) red light.
C) green light.
D) blue light.
E) ultraviolet.
If the Moon had twice as much mass and still orbits Earth at the same distance, ocean
bulges on Earth would be
A) smaller.
B) larger.
C) unequal in size.
D) not significantly different.
E) none of the above
Fourier discovered that periodic waves can be represented by
A) a series of non-periodic waves.
B) the summation of a series of simple sine waves.
C) a binary code.
D) pulses of the same amplitude.
What is the wavelength of a 1-hertz electromagnetic wave?
A) less than 1 m
B) 1 m
C) more than 1 m
The two measurements necessary for calculating average speed are
A) acceleration and time.
B) velocity and time.
C) distance and time.
D) distance and acceleration.
E) velocity and distance.
Some charged particles in a bubble chamber are seen to move in spirals due to
A) decreasing magnetic field.
B) decreasing electric charge.
C) perspective and parallax.
D) energy dissipation.
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
When you float in fresh water, the buoyant force that acts on you is equal to your
weight. When you float higher in the denser water of the Dead Sea, the buoyant force
that acts on you is
A) greater than your weight.
B) less than your weight.
C) equal to your weight.
If only one color is absorbed in the pigment of a particular blue paint, that color would
be
A) red.
B) yellow.
C) green.
D) blue.
Facts in the field of science
A) are absolute.
B) are changeable.
C) mean very little.
D) are more important than theories.
If the radiation curve for an incandescent lamp filament peaks in the green region, the
object would appear
A) red.
B) yellow.
C) green.
D) blue.
E) white.