Moonquakes release about as much energy as
A) a moderate earthquake.
B) a nuclear fission bomb.
C) the eruption of Mt. St. Helens in 1980.
D) a firecracker.
E) nothing. There are no moonquakes since the Moon is geologically dead.
D
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Just as water flows from a region of high pressure to a region of low pressure, electric charge flows from a region of
A) high electric pressure to a region of low electric pressure. B) high potential energy to a region of low potential energy. C) deep to shallow regions. D) all of the above
Water is to be condensed at 1 atmosphere pressure in a compact heat exchanger having vertical stainless steel plates at 40ºC. Plot the condensation boundary layer thickness flowing down the vertical surface as a function of the distance down the plate, assuming laminar flow. At what point would you assume the condensate flow to become turbulent?
What will be an ideal response?
What is the resolution limit at 400. nm, due to diffraction, of the Hubble Space Telescope which has an aperture of 2.4 meters?
What will be an ideal response?
The Moon is gravitationally attracted to Earth. Is Earth gravitationally attracted to the Moon?
A. No, the Moon has no gravity. B. Yes, but the force of attraction is less. C. Yes, and the force of attraction is the same. D. Yes, but the force of attraction is greater.