Saturn’s rings are composed of __________.
a. gas from the early solar system.
b. a series of solid concentric circles.
c. lots of individual particles of ice and rock.
d. parts of Saturn’s upper atmosphere being vented into space
lots of individual particles of ice and rock
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There is a solar eclipse of some kind every new moon
Indicate whether the statement is true or false
Which of the following is not an appropriate unit for measuring acceleration?
A. m/min2 B. miles/hr/s C. km/min/s D. m/s E. ft/s2
Which of the following will not influence the rate at which nuclear reactions will occur in a nuclear power plant where the fuel elements are a mixture of 235U and 238U?
a. the presence of moderating material b. the presence of control rods c. the percentage of 235U relative to 238U d. the percentage of the energy that is used to produce electricity
Cometary dust tails lag behind the bluish ion tails as the comet rounds the Sun
Indicate whether the statement is true or false