You are riding in a spaceship that has no windows or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. What should you do?
A) You can determine if the ship is moving by determining the apparent velocity of light.
B) You can determine if the ship is moving by checking your precision time piece. If its running slow, the ship is moving.
C) You can determine if the ship is moving either by determining the apparent velocity of light or by checking your precision time piece. If its running slow, the ship is moving.
D) You should give up because you have taken on an impossible task.
D
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As frequency is varied in an RLC series circuit, resonance is reached when
A. the impedance becomes zero. B. the inductive reactance is equal to the capacitive reactance. C. the sum of the inductive and capacitive reactances is equal to the resistance. D. the capacitive reactance is equal to the resistance. E. the inductive reactance is equal to the resistance.
A tuning fork has a frequency of 400 Hz and hence a period of 2.50 × 10^-3 s. If the tuning fork is in an inertial frame of reference moving by the observer at speed of 0.680c, what is the frequency of the fork as measured by the observer? (Assume that measurements are strictly by optical means and that the speed of sound waves in air is not pertinent here.)
a. 454 Hz c. 605 Hz b. 293 Hz d. 265 Hz
The lowest temperature possible in nature is
A) 0 degrees C. B) -273 degrees C. C) 4 K. D) none of the above
In an ideal transformer, how many turns are necessary in a 110-V primary if the 24-V secondary has 100 turns?
A) 458 B) 240 C) 110 D) 22