What is the circular velocity of an object orbiting Earth at a distance of 100,000 km from Earth's center? Hint: ; G = 6.67 10^-11 m3/s2/kg
a. 0.2 m/s
b. 2 m/s
c. 20 m/s
d. 200 m/s
e. 2,000 m/s
e
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A 0.40 H inductor has a current that rises from zero to 3.0 A in 6.0 s. What is the average power required to accomplish this?
A. 15 W B. 9.0 W C. 1.5 W D. 0.60 W E. 0.30 W
A star more massive than our Sun
A) will have a longer lifetime B) will have a shorter lifetime C) will have the same lifetime as the Sun D) could have either a longer lifetime or a shorter lifetime depending on its chemical composition
Suppose a 5.0-meter diameter telescope were constructed on the dark side of the moon. The viewing there (except for brief periods of sunlight) would be excellent. As an example, what would be the separation between two objects that could just be resolved on the planet Mars in 500 nm light? [The distance to Mars at closest approach is 50 million miles.]
What did Isaac Newton believe about the nature of light?
a. That light was a force. b. That light consisted of waves. c. That light was a stream of particles. d. That light was a fluid found in matter. e. Newton had no theories about light.