Hydro and wind power are indirect forms of
A) solar energy.
B) fossil fuels deep down.
C) nuclear energy in Earth's interior.
D) none of the above
Answer: A
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The graphs below show a voltage phasor at different instances of time. Which voltage phasor shows the instantaneous value of the voltage with the largest magnitude?
a.
b.
c.
d.
Mars' mass is only a tenth of the Earth's, and its density is also less than the Earth's
Indicate whether the statement is true or false
The measured value of the speed of light is about 300,000 km/s. Suppose a futuristic space train is traveling at 200,000 km/s with its headlights on. If you could measure the speed of the light from the headlights, you would find it to be
A) 200,000 km/s. B) 100,000 km/s. C) 300,000 km/s. D) 500,000 km/s.
The process where some fraction of the quasar's enormous energy output is absorbed by the surrounding galactic gas is called ________
Fill in the blank(s) with correct word