A lunar eclipse can only occur when the Moon is ____
a. full
b. new
c. waxing
d. waning
e. rising
a
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A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun. If the bird takes 1 second to drop down to a worm below, the worm would be 30 km downrange from the bird when it reached the ground
This faulty reasoning is best countered with Newton's A) law of inertia. B) law of gravity. C) laws of motion. D) none of the above
The wavelength of an electromagnetic wave is 600 nm. What is its frequency? (c = 3.0 × 108 m/s)
A) 200 × 1012 Hz B) 300 × 1012 Hz C) 400 × 1012 Hz D) 500 × 1012 Hz E) 600 × 1012 Hz
The radius of the earth’s (almost circular) orbit around the sun is 150,000,000 km, and it takes 1 y for the earth to go around the sun. Imagine that a certain satellite goes in an almost circular orbit of radius 15,000 km around the earth (this radius is 10,000 times smaller than the earth’s orbital radius around the sun). What is the period of this orbit?
A. 10-6 y B. 10-4 y C. 10-3 y D. 106 y E. These periods are not related in any simple way.
Electrons can be transferred from one place to another by the process of
A) friction. B) contact, which means touching. C) induction, which means non-touching. D) all of the above E) none of the above