A satellite circles planet Roton every 2.8 h in an orbit having a radius of 1.2 × 10^7 m. If the radius of Roton is 5.0 × 10^6 m, what is the magnitude of the free-fall acceleration on the surface of Roton?
a. 31 m/s2
b. 27 m/s2
c. 34 m/s2
d. 40 m/s2
e. 19 m/s2
b
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What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1000 m? (The pressure inside the bathysphere is, hopefully, 1 atm.) ?sea water = 1.02 × 10^3 kg/m3
a. 1.26 × 10^4 N b. 1.26 × 10^6 N c. 1.26 × 10^8 N d. 1.26 × 10^10 N e. 1.26 × 10^2 N
A skier leaves a ski jump with a horizontal velocity of 29.4 m/s. The instant before she lands three seconds later, the magnitudes of the horizontal and vertical components of her velocity are:
a. 0; 29.4 m/s. b. 29.4 m/s; 0. c. 29.4 m/s; 29.4 m/s. d. 29.4 m/s; 41.6 m/s. e. 41.6 m/s; 41.6 m/s.
Superconductivity is lost when a certain ____is exceeded
a. voltage d. electric field b. current e. critical temperature c. resistance