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
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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
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?
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
The average kinetic energy of the atoms in a spoon determines its __________
Fill in the blank(s) with correct word