Which of the following may be caused by a protostellar disk?

A) protostellar jets
B) protostellar winds
C) accretion of material onto the star
D) relatively slow protostellar rotation
E) all of the above


E

Physics & Space Science

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During the June solstice, the Sun rises in the southeast horizon in Earth's Northern Hemisphere.

Answer the following statement true (T) or false (F)

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The overall result of the proton-proton chain is

A) 6 H becomes 1 He + energy. B) p + p becomes 2H + energy. C) 4 H becomes 1 He + energy. D) Individual protons are joined into long chains of protons.

Physics & Space Science

If they existed, and if they were watching, a civilization at the center of the Milky Way could have detected our first TV signals by now

Indicate whether the statement is true or false

Physics & Space Science

As an object of mass 60 kg approaches the bottom of a ramp, point A, its speed is 20 m/s. It goes up the frictionless plane and turns around at point B. What is the potential energy of this object at point B? Use g = 10 m/s2

A) 0 J B) 6.0 × 103 J C) 9 × 103 J D) 12 × 103 J E) 18 × 103 J

Physics & Space Science