The length of a spaceship is 14 m when it is at rest. If the spaceship travels by you with a speed of 0.80c, what length does it appear to you?
A)
6.3 m
B)
8.4 m
C)
18 m
D)
20 m
E)
22 m
B
Physics & Space Science
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The diameter of a circle is doubled. By what factor is the area changed?
A. 
B. 2
C. 4
D. 
E. 1
Physics & Space Science
A scuba diver losing her air supply while far beneath the water surface is advised when ascending to
A) hold air in her lungs. B) allow air to escape her lungs. C) panic.
Physics & Space Science
The peak voltage of an AC source is 400 V. What is the rms voltage?
a. 100 V c. 141 V b. 200 V d. 283 V
Physics & Space Science
At very low temperatures the resistivity of some materials becomes zero as indicated by high precision measurements. This phenomenon is known as
A) supercapacitance. B) superconductivity. C) BSCCO. D) superresistivity. E) supraresistivity.
Physics & Space Science