Hydrogen lines are weak in M class stars because they have much less of it than do A class stars
Indicate whether the statement is true or false
FALSE
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The first stage of Earth's evolution is _____
A) cratering B) basin formation C) differentiation D) slow surface evolution
The electric field inside the dome of a Van de Graaff generator depends on the
A) amount of external charge. B) volume of the dome. C) amount of charge and volume of the dome. D) none of the above
Lydia proposes to send an interstellar probe off in stages. The first stage, traveling radially outward at 0.500 c relative to Earth, will send off a second stage traveling in the same direction as the first stage at a speed of 0.500 c relative to the first stage. Finally, the second stage will send off a third stage traveling in the same direction at 0.500 c relative to the second stage
Relative to Earth, the speed of the third stage will have a magnitude of a. 0.500 c. b. 0.800 c. c. 0.929 c. d. 0.972 c. e. 1.500 c.
A piece of iron rests on top of a piece of wood floating in a bathtub. If the iron is removed from the wood, what happens to the water level in the tub?
A) It goes up. B) It goes down. C) It does not change. D) cannot be determined from the information given