The radius of the earth is R. At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s2?
A) 0.41 R
B) 0.50 R
C) 1.00 R
D) 1.41 R
E) 0.25 R
A
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Imagine we have a planet identical to Jupiter around another star, with the exception that its orbit is much closer. How would its density compare to Jupiter?
A) it would be slightly higher B) it would be much higher C) it would be lower D) it would be the same
A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s. The vector sum of all the forces exerted on this crate must point
A) down the ramp. B) up the ramp. C) perpendicular to the ramp. D) vertically downward. E) None of the above choices is correct.
The change in entropy of a mass m of a solid substance which has a latent heat of fusion L and melts at a temperature T is
a. LT/m b. mL ln(T) c. mLT d. mL/T e. L/mT
A charge of 0.80 nC is placed at the center of a cube that measures 4.0 m along each edge. What is the electric flux through one face of the cube?
a. 90 N × m2/C b. 15 N × m2/C c. 45 N × m2/C d. 23 N × m2/C e. 64 N × m2/C