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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

The first stage of Earth's evolution is _____

A) cratering B) basin formation C) differentiation D) slow surface evolution

Physics & Space Science

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.

Physics & Space Science