To which of these phenomena are X-ray busters most similar?
A) novae
B) planetary nebulae
C) type I supernovae
D) type II supernovae
E) hypernovae
A
Physics & Space Science
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The radius of the earth is R. At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s2?
A) 0.41R B) 0.50R C) 1.0R D) 1.4R E) 2.0R
Physics & Space Science
Polaroid sunglasses reduce much glare by polarization axes that are
A) vertical. B) horizontal. C) at right angles to each other.
Physics & Space Science
Which pulls on the oceans of Earth with a greater force?
A) Moon B) Sun C) both pull the same.
Physics & Space Science
A simple pendulum is suspended from the ceiling of a stationary elevator, and the period is measured. If the elevator accelerates upward, the period
1.increases. 2.decreases. 3.remains the same.
Physics & Space Science