An Earth satellite is orbiting at a distance from the Earth's surface equal to two Earth radii. At this location, the acceleration due to gravity is what factor times the value of g at the Earth's surface?
a. There is no acceleration since the satellite is in orbit.
b. 1/9
c. 1/4
d. The answer is not given.
B
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In a Newtonian fluid, the plastic shear strain rate is equal to the applied shear stress divided by the _________.
Fill in the blank(s) with the appropriate word(s).
Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between them?
A) 2.0 N B) 4.0 N C) 16 N D) 1/4 N E) 1/16 N
An 800-N billboard worker stands on a 4.0-m scaffold weighing 500 N and supported by vertical ropes at each end. How far would the worker stand from one of the supporting ropes to produce a tension of 770 N in that rope?
a. 1.4 m c. 2.5 m b. 2.0 m d. 2.7 m
Dielectrics: A 12.6-µF isolated capacitor is constructed with Teflon, having a dielectric constant of 2.1, between the plates. The capacitor is initially charged to 1.5 volts, and then the Teflon is removed.(a) How much excess charge was originally stored on the plates of the capacitor?(b) After removing the Teflon, what is the potential difference across the capacitor plates?
Fill in the blank(s) with the appropriate word(s).