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University Physics with Modern Physics 2nd Edition By Wolfgang Bauer, Gary Westfall
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University Physics with Modern Physics 2nd Edition By Wolfgang Bauer, Gary Westfall
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Test Bank For University Physics with Modern Physics2nd Edition By Wolfgang Bauer, Gary Westfall
A container holds gas molecules of mass m at a temperature T. A small probe
inserted into the container measures the value of the x-component of the velocity of
the molecules. What is the avg value of 1/2mv^2? - ANSWER: 1/2 kT
A container holds N molecules of a diatomic gas at temperature T. At this
temperature, rotational and vibrational motions of the gas molecules are allowed. A
quantity of energy E is transferred to the gas. What fraction of this added energy is
responsible for increasing the temperature of the gas? - ANSWER: 3/7
Two identical containers with fixed volumes hold equal amounts of Ne gas and N2
gas at the same temperature of 1000K. Equal amounts of heat energy are then
transferred to the two gases. How do the final temperatures of the two gases
compare? - ANSWER: T(Ne) > T(N2)
A certain particle at rest lives for 1.25 ns. When the particle moves through the
laboratory at a speed of 0.91c, what is its lifetime according to an observer in the
laboratory? - ANSWER: 3.01 ns
Two electrons, each with a kinetic energy of 2.52 MeV, collide head-on to produce a
new particle. What is the rest energy of this new particle? - ANSWER: 6.06 MeV
A newly created particle is moving through the laboratory at a speed of 0.765c. It is
observed to live for a time of 0.231 μs before decaying. What would be the lifetime
of this particle according to someone who is moving along with the particle at a
speed
of 0.765c? - ANSWER: 0.149 μs
Tom fires a laser beam in the y direction of his coordinate system. Mary is moving
relative to Tom in the x direction with a speed of 0.65c. According to Mary, what is
the y component of the speed of Tom's laser beam? - ANSWER: .76c
In Albert's frame of reference, there is a stick of length LA at rest along the x axis.
Betty is traveling along the x axis in either the positive or negative direction. In
Betty's frame of reference, the length of the stick is: - ANSWER: always less than LA
Sitting in a chair in his laboratory, Albert observes a particle to be created at one
instant moving at a speed of 0.65c and to decay after a time interval of 5.75 ns. Betty
is moving along with the particle at a speed of 0.65c. What is the time between the
creation and decay of the particle according to Betty? - ANSWER: 4.37 ns
What is the momentum of a proton that has a kinetic energy of 750 MeV? -
ANSWER: 1404 MeV/c
, A certain particle at rest has a lifetime of 2.52 μs. What must be the speed of the
particle for its lifetime to be observed to be 8.34 μs? - ANSWER: 0.953c
A particle moving through the laboratory at a speed of v = 0.878c is observed to have
a lifetime of 2.43 ns. If that particle had been produced at rest in the laboratory,
what
would its lifetime be? - ANSWER: 1.16 ns
An unstable particle moving through the laboratory leaves a track of length 3.52 mm.
The particle is moving at a speed of 0.943c. How long would the particle's track
appear to someone moving with the particle? - ANSWER: 1.17 mm
Tom observes a blinking light bulb that is at rest in his reference frame. Mary is
moving relative to Tom at a speed of 0.735c. According to Mary, the light blinks on
for a time interval of 5.25 ms. What is the blinking interval according to Tom? -
ANSWER: 3.56 ms
A distant star is 4.8 light-years (l.y.) from Earth, according to observers on Earth. An
astronaut will travel to the star in a spaceship at a speed of 0.925c. During the
voyage, what distance does the astronaut measure between the Earth and the star?
- ANSWER: 1.8 l.y.
An astronaut was told on Earth in 1993 that she had exactly 15 years to live. Starting
in 1993 she made a journey at a speed of 0.80c to a distant star and back. What is
the
latest New Years Day she will be able to celebrate on Earth? - ANSWER: 2018
A particle of mass m moving with speed v collides with a particle of mass 2m at rest.
The particles merge to form only a new particle of mass M that moves with speed V.
How is M related to m? - ANSWER: M > 3m
A particle of mass M at rest decays into two identical particles each of mass m =
0.100M that travel in opposite directions. What is the speed of these particles? -
ANSWER: .98c
A certain particle has a proper lifetime of 1.00 × 10-8 s. It is moving through the
laboratory at a speed of 0.85c. What distance does the particle travel in the
laboratory? - ANSWER: 4.84m
Two particles of the same mass m and moving at the same speed v collide head-on
and
combine to produce only a new particle of mass M. Which of the following is
correct? - ANSWER: M > 2m
Two particles each of mass m are each moving at a speed of 0.707c directly toward
one another. After the head-on collision, all that remains is a new particle of mass M.
What is the mass of this new particle? - ANSWER: 2.8m
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