Most molecules found in the interstellar medium are based on carbon
Indicate whether the statement is true or false
FALSE
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Relative Velocity: A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s. During this swim, she is swept downstream 480 m. How fast can she swim in still water?
A. 0.50 m/s B. 0.80 m/s C. 1.2 m/s D. 1.4 m/s E. 1.8 m/s
The approximate daily energy consumption of primitive humans (before fire) was about
a. 2000 kilojoules. b. 8000 kilojoules. c. 12,000 kilojoules. d. 48,000 kilojoules e. 400,000 kilojoules.
The circuit below contains three 100-watt light bulbs and a capacitor. The emf ? = 110V. The capacitor is fully charged. Which light bulb(s) is(are) dimmest?
a.
A
b.
B
c.
C
d.
A and B
e.
All three are equally bright (or dim).
Pumped storage facilities ________
a. increase the overall efficiency of a power plant b. make use of the output of electricity from photovoltaic cells c. are used to produce electricity mainly at night d. have an increase in their potential energy mainly at night e. cannot be used with a nuclear plant