When an ice cube in a glass of water melts, the water level
A) rises.
B) falls.
C) remains the same.
When light passes through common windowpane, its angle of emergence is
A) usually less than its angle of incidence.
B) always less than its angle of incidence.
C) the same as its angle of incidence.
D) usually more than its angle of incidence.
E) always more than its angle of incidence.
The higher the temperature of an object, the
A) longer the wavelengths it radiates.
B) shorter the wavelengths it radiates.
C) makes no difference in the wavelengths it radiates
Once an alpha particle is outside the nucleus it is
A) free to wander about the surrounding material.
B) quickly bound to a neighboring nucleus.
C) electrostatically repelled.
D) radioactive.
In the equation E = hf, the symbol f stands for
A) wave frequency.
B) wavelength.
C) rate at which photons are emitted.
D) none of the above
A red crab very deep in water, where sunlight is dim, appears
A) red.
B) orange.
C) cyan.
D) brown.
E) no color”black.
In terms of thermal expansion it is important that
A) a key and its lock are made of similar or the same material.
B) the fillings in your teeth expand at the same rate as teeth.
C) iron rods and concrete in which they’re embedded expand equally.
D) all of the above
E) none of the above
Buoyant force is greater on a submerged 10-newton block of
A) lead.
B) aluminum.
C) same on each
The form of heat transfer that doesn’t depend on a medium is
A) conduction.
B) convection.
C) radiation.
D) all of the above
A metal block has a density of 5000 kg per cubic meter and a mass of 15,000 kg. What
is its volume?
A) 0.33 cubic meters
B) 3 cubic meters
C) 5 cubic meters
D) 15 cubic meters
E) none of the above
Two charges that are separated by one meter exert 1-N forces on each other. If the
magnitude of each charge is doubled, the force on each charge is
A) 1 N.
B) 2 N.
C) 4 N.
D) 8 N.
E) none of the above
It is said that electric charge is conserved, which means that electric charge
A) may occur in an infinite variety of quantities.
B) is a whole number multiple of the charge of one electron.
C) will interact with neighboring electric charges.
D) can be neither created nor destroyed.
E) is sometimes negative.
When an element undergoes nuclear transmutation, the result is a completely different
A) isotope of the same element.
B) ion of the same element.
C) element.
If vertically falling rain makes slanted 45o streaks on the side windows of a moving car,
the speed of the car
A) is less than the speed of the falling drops.
B) equals the speed of the falling drops.
C) exceeds the speed of the falling drops.
D) need more information
One kilowatt-hour represents
A) 1 N.
B) 60 N/s.
C) 60,000 W.
D) 3.6 million joules.
E) none of these
A wiggle in both space and time is a
A) vibration.
B) wave.
C) both of these
D) neither of these
When a volume of air is compressed, air temperature
A) increases.
B) decreases.
C) neither of these
Fissioning a lead nucleus would yield a net
A) absorption of energy.
B) release of energy.
C) neither of these
As a huge rotating cloud of particles in space gravitate together forming an increasingly
dense ball, it shrinks in size and
A) rotates slower.
B) rotates at the same speed.
C) rotates faster.
D) cannot rotate.
The natural frequency of an object depends on its
A) size.
B) shape.
C) elasticity.
D) all of the above
E) none of the above
Magnetic field strength inside a current-carrying coil will be greater if the coil encloses
a
A) vacuum.
B) wooden rod.
C) glass rod.
D) rod of iron.
E) none of the above
Light from a laser is
A) monochromatic.
B) in phase.
C) coherent.
D) all of the above
E) none of the above
A Doppler effect occurs when a source of sound moves
A) towards you.
B) away from you.
C) either of these
D) neither of these
A closed, sealed can of air placed on a hot stove. The contained air undergoes an
increase in
A) mass.
B) temperature.
C) both of these
D) neither of these
Magenta light is a mixture of
A) red and blue light.
B) red and cyan light.
C) red and yellow light.
D) yellow and green light.
E) none of the above
A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she
is one Earth radius above Earth’s surface. How much is her weight there?
A) 0
B) 100 N
C) 200 N
D) 400 N
E) none of the above
A satellite coasting at constant speed in a circular orbit
A) is beyond the pull of Earth’s gravity
B) is nevertheless accelerating.
C) undergoes changes in its potential energy.
D) none of the above
If an object’s mass is decreasing while a constant force is applied to the object, the
acceleration
A) decreases.
B) increases.
C) remains the same.
The sources of both X-rays and gamma rays are
A) electron clouds.
B) the atomic nucleus.
C) both of these
D) neither of these
When steam condenses, the surrounding air is
A) cooled.
B) warmed.
C) both of these
D) neither of these
If the mass of an object were doubled while its volume remained the same, its density
would
A) be half.
B) double.
C) stay the same.
D) be four times as great.
Metals are shiny because
A) they reflect 100% of incident light.
B) they are poor absorbers of light.
C) their electrons vibrate to the oscillations of any incident light.
D) none of the above
A humming bird flying at 4 km/h that gets caught in a 3-km/h crosswind has a resultant
speed of about
A) 3 km/h.
B) 4 km/h.
C) 5 km/h.
D) more than 5 km/h.
A wave of frequency of 1000 hertz vibrates at
A) less than 1000 cycles per second.
B) 1000 cycles per second.
C) more than 1000 cycles per second.
D) none of the above
The number of nodes, including the end points, in a standing wave that is two
wavelengths long is
A) 1.
B) 2.
C) 3.
D) 4.
E) none of the above