Doubling the momentum of
a. a particle doubles its relativistic total energy.
b. a particle quadruples its relativistic total energy.
c. a photon doubles its relativistic total energy.
d. a photon quadruples its relativistic total energy.
[Ques. 2] According to the special theory of relativity, which of the following happens to the size of the time interval between two events occurring in an inertial frame of reference as the frame's velocity with respect to the observer increases?
a. interval increases
b. interval decreases
c. interval remains constant
d. interval vanishes to zero when velocity equals half speed of light
[Ques. 3] The observed relativistic length of a super rocket moving by the observer at 0.70c will be what factor times that of the measured rocket length if it were at rest?
a. 0.55
b. 0.71
c. 0.51
d. 1.4
e. 1.8
[Ques. 4] A mass is bouncing on the end of a spring with a period T when measured by a ground observer. What would the period of oscillation be (as measured by the same observer) if the mass and spring were moving past the ground observer at a speed of 0.9c?
a. 5.3 T
b. 0.40 T
c. 3.2 T
d. 2.3 T
e. 1.1 T
[Ques. 5] What is proper time?
a. Proper time is the time measured by a clock at rest with respect to the observer.
b. Proper time is time based on your actual longitude, not your time zone.
c. Proper time is the time given on your GPS.
d. Proper time means standard time as opposed to daylight savings time.
[Ques. 6] A spaceship, which has length 35 m and width 16 m when at rest, is moving in a direction along its length at a speed where its length contraction results in a 28-m length measured by a stationary observer. What would the measured width be in this case?
a. between 18 and 20 m
b. 16 m
c. 13 m
d. less than 13 m
e. 20 m
[Ques. 7] According to the special theory of relativity, if a 30-year old astronaut sent on a space mission is accelerated to speeds close to that of light, and then returns to Earth after 20 years as measured on Earth, what would be his biological age upon returning?
a. less than 50 years
b. 50 years
c. more than 50 years
d. exactly 100 years
[Ques. 8] According to the special theory of relativity, which of the following happens to the length of an object, measured in the dimension parallel to the motion of its inertial frame of reference, as the velocity of this frame increases with respect to a stationary observer?
a. length increases
b. length decreases
c. length remains constant
d. length vanishes to zero when velocity equals half speed of light
[Ques. 9] The relativistic effect of time dilation has been verified by which of the following?
a. the discovery of black holes
b. muon experiments
c. twin experiments
d. red shift in distant galaxies
[Ques. 10] Which statement regarding Einstein's theories is correct?
a. According to special relativity, moving clocks run more slowly than those at rest, and according to general relativity, clocks higher in a gravity field run more quickly.
b. According to special relativity, moving clocks run more quickly than those at rest, and according to general relativity, clocks higher in a gravity field also run more quickly.
c. According to special relativity, moving clocks run more quickly than those at rest, and according to general relativity, clocks higher in a gravity field run more slowly.
d. According to special relativity, moving clocks run more quickly than those at rest, and according to general relativity, clocks higher in a gravity field also run more quickly.
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