An airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. If her speed is 200 m/s at the time, find the radius of the loop
4080 m
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Length Contraction: Observer A sees a ruler moving by in a relativistic rocket and measures its length to be LA. Observer B moves along with the rocket and measures the length of the ruler to be LB. What is true about these two length measurements?
A. LA > LB B. LA = LB C. LA < LB D. LA could be greater or smaller than LB depending on the direction of the motion.
The angular sizes of the Sun and Moon are about the same because
A) both objects have the same physical size. B) both objects are located the same distance away. C) the Sun is larger in size than the Moon by the same factor (about 400) that it is farther in distance. D) their angular sizes are an illusion created by the apparent locations on the celestial sphere.
Acceleration is the time rate of change of what?
a. distance b. speed c. displacement d. velocity
A quantity of an ideal gas is kept in a rigid container of constant volume. If the gas is originally at a temperature of 19°C, at what temperature will the pressure of the gas double from its original value?
A) 91°C B) 38°C C) 311°C D) 273°C E) 122°C