An astronaut stands by the rim of a crater on the Moon, where the acceleration of gravity is 1.62 m/s2 and there is no air. To determine the depth of the crater, she drops a rock and measures the time it takes for it to hit the bottom

If the time is 6.3 s, what is the depth of the crater? A) 10 m
B) 14 m
C) 26 m
D) 32 m
E) 38 m


D

Physics & Space Science

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Astronaut Mark Uri is space-traveling from planet X to planet Y at a speed of relative to the planets, which are at rest relative to each other

When he is precisely halfway between the planets, a distance of 1.0 light-hour from each one as measured in the planet frame, nuclear devices are detonated on both planets. The explosions are simultaneous in Mark's frame. What is the difference in the time of arrival of the flashes from the explosions as observed by Mark? A) 0 min B) 180 min C) 90 min D) 360 min E) 113 min

Physics & Space Science

A rod of length 1.00 m has a mass per unit length given by , where is in kg/m. The rod is placed on the x axis going from x = 0.00 m to x = 1.00 m. What is the rotational inertia of the rod in kg

style="vertical-align: -2px;" width="5px" height="18px" />m2 about the y axis? What will be an ideal response?

Physics & Space Science

If a = 3.0 mm, b = 4.0 mm, Q1 = 60 nC, Q2 = 80 nC, and q = 32 nC in the figure, what is the magnitude of the electric force on q?

A. 1.6 N B. 1.3 N C. 1.9 N D. 2.2 N E. 0.040 N

Physics & Space Science

The average kinetic energy of the atoms in a spoon determines its __________

Fill in the blank(s) with correct word

Physics & Space Science