The Voyager space probes used electricity provided by
a. fuel cells
b. solar arrays
c. radioisotope thermoelectric generators
d. hydrazine
e. none of the above
D
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Which of the following is NOT one of the four stages in the development of a terrestrial planet?
a. flooding b. cratering c. slow surface evolution d. fusion of hydrogen to helium e. differentiation
How are mass and weight different?
A. Weight is the amount of matter an object contains; mass is the type of matter an object is made of. B. Mass is the amount of matter an object contains; weight is how much mass an object contains. C. Weight is a measure of how much gravity pulls an object; mass is how much matter the object has. D. There is no difference; they are the same.
At what longitude is an observer who sees the last-quarter moon on his meridian when it is 12:00 noon local solar time at 75°W?
Why must you be careful in how you start the timing when you measure the time increments for multiple oscillations of a vibrating system?