What future awaits Triton, the largest satellite of Neptune?
a. Tidal break-up as it spirals closer to Neptune
b. Escape from Neptune after billions of years, as Triton gradually spirals outward
c. Gravitational capture by Pluto
d. Probable destruction from impact by Pluto
Answer: a. Tidal break-up as it spirals closer to Neptune
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Two infinite, uniformly charged, flat surfaces are mutually perpendicular. One of the sheets has a charge density of +60 pC/m2, and the other carries a charge density of ?80 pC/m2. What is the magnitude of the electric field at any point not on either surface?
A. 1.1 N/C B. 5.6 N/C C. 7.9 N/C D. 3.8 N/C E. 4.0 N/C
During retrograde motion, the planet Mars rises in the west and sets in the east.
Answer the following statement true (T) or false (F)
If a vector pointing upward has a positive magnitude, a vector pointing downward has a negative magnitude
A) True B) False
A golf ball hits a wall and bounces back at 3/4 the original speed. What part of the original kinetic energy of the ball did it lose in the collision?
a. 1/4 c. 7/16 b. 3/8 d. 9/16