PHYSICS 72659

subject Type Homework Help
subject Pages 10
subject Words 1361
subject Authors Paul G. Hewitt

Unlock document.

This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
page-pf1
Which is an example of matter in a plasma phase?
A) dry ice
B) a torch flame
C) molten lava
D) liquid hydrogen
E) none of the above
Two planets in space gravitationally attract each other. If both the masses and distances
are doubled, the force between them is
A) one-quarter.
B) half as much.
C) twice as much.
D) four times as much.
E) none of the above
When the handle of a tuning fork is held solidly against a table, the sound becomes
louder and the time that the fork keeps vibrating
page-pf2
A) becomes longer.
B) becomes shorter.
C) remains the same.
A transformer produces
A) energy.
B) power.
C) neither, but transforms mechanical energy to electric energy.
D) none of the above
One of water's interesting thermal properties is that when heated it takes a relatively
A) long time in changing temperature.
B) short time in changing temperature.
C) same amount of time to cool.
D) none of the above
page-pf3
When moth balls sublime to gas they
A) absorb energy.
B) release energy.
C) both of these
D) neither of these
All events and all things exist in "the spacetime continuum" with coordinates
A) of distances in three dimensions.
B) of time.
C) both of these
D) none of these
page-pf4
Fusing two carbon nuclei would occur with
A) absorption of energy.
B) release of energy.
C) neither of these
The spectral lines of atomic spectra are
A) images of the slit in a spectroscope.
B) orderly, and even predictable.
C) as an identity of atoms as fingerprints are of people.
D) all of the above
E) none of the above
Surrounding every stationary electron is
A) a magnetic field.
B) an electric field.
page-pf5
C) both of these
D) neither of these
Suzie Skydiver jumps from a high-flying plane. As her velocity of fall increases, her
acceleration
A) increases.
B) decreases.
C) remains unchanged regardless of air resistance.
Some light switches that glow in the dark after the lights are turned off employ
A) fluorescence.
B) resonance.
C) incandescence.
D) all of the above
E) none of the above
page-pf6
A 1000-kg automobile enters a freeway on-ramp at 20 m/s and accelerates uniformly up
to 40 m/s in a time of 10 seconds. How far does the automobile travel during that time?
A) 100 m
B) 200 m
C) 300 m
D) 400 m
E) none of the above
Colors seen in the flames of a burning log originate with the variety of
A) multi-layered incandescent surfaces.
B) electron transitions in various atoms.
C) temperatures.
D) absorbing gases between the log and the viewer.
page-pf7
The radioactive half-life of a material is the time for
A) half of an original quantity of the material to decay.
B) its decay rate to reduce to half.
C) both of these
D) neither of these
Which has the smaller critical mass; U-235 that releases 2.5 neutrons per fission, or
Pu-239 that releases 2.7 neutrons per fission?
A) U-235
B) Pu-239
C) both would have the same critical mass.
Successive bright fringes in an interference pattern result from
A) equal-length distances from the slits.
B) distance from the slits successively increasing one wavelength at a time.
page-pf8
C) destructive interference.
D) none of the above
Compared to a 50-kg person, a 100-kg person at the beach requires
A) twice as much suntan lotion.
B) the same amount of suntan lotion.
C) less than twice as much suntan lotion.
A Mack truck and a Volkswagen traveling at the same speed have a head-on collision.
The vehicle that undergoes the greatest change in velocity will be the
A) Volkswagen.
B) Mack truck.
C) same for both.
page-pf9
To kick a football so it won't topple end over end, kick it so the force of impact extends
A) above its center of gravity.
B) through its center of gravity.
C) below its center of gravity.
If Earth rotated more slowly about its axis, your weight would
A) increase.
B) decrease.
C) stay the same.
D) be zero.
If sunlight were green instead of white, the most comfortable color to wear on a cold
day would be
A) magenta.
page-pfa
B) yellow.
C) green.
D) blue.
E) violet.
Fermat's principle applies to
A) reflection.
B) refraction.
C) both of these
D) neither of these
A conductor differs from an insulator in that a conductor has more
A) electrons than protons.
B) protons than electrons.
C) energy than an insulator.
page-pfb
D) faster moving molecules.
E) none of the above
Some minerals glow when illuminated with ultraviolet light because
A) ultraviolet photons boost atomic electrons in the mineral to higher energy states.
B) ultraviolet photons have high energy.
C) of selective reflection.
D) of selective transmission.
E) none of the above
Two identical arrows, one with twice the speed 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) two times as far.
C) four times as far.
D) more than four times as far.
page-pfc
E) none of the above
Which geometrical shape has the least surface area for a given volume?
A) cube
B) pyramid
C) cylinder
D) sphere
E) none of the above
An ion and an isotope are
A) very much one and the same
B) very unlike
C) opposites.
page-pfd
The tangential velocity of an Earth satellite is its velocity
A) parallel to the surface of Earth.
B) perpendicular to the surface of Earth.
C) attributed to satellites moving in any direction.
Assuming no change in temperature, as a freely expanding helium-filled balloon rises in
the atmosphere, the buoyant force acting on it
A) increases.
B) decreases.
C) remains nearly the same.
Disregarding the effects of friction, a cyclist will coast farther when a lamp powered by
a wheel generator is
A) of low wattage.
page-pfe
B) of high wattage.
C) turned off.
D) none of the above
According to quantum physics, measuring the temperature of lava from a distant
volcano by photographing its color with a telescopic camera measurably affects the
lava's temperature.
A) True
B) False
C) both of these depending on circumstances
The discovery of electromagnetic induction is credited to
A) Joseph Henry in America.
B) Michael Faraday in England.
C) both of these
D) neither of these
page-pff
There is an upper limit on the speed of a particle, which means there is also an upper
limit on its
A) momentum.
B) kinetic energy.
C) both of these
D) neither of these
The index of refraction for crown glass, common in eyeglasses, is 1.52. The index of
refraction of a particular plastic lens is 1.76. Light bends more in the
A) crown glass.
B) plastic lens.
C) same speed in each.
D) need more information

Trusted by Thousands of
Students

Here are what students say about us.

Copyright ©2022 All rights reserved. | CoursePaper is not sponsored or endorsed by any college or university.