The sun's energy comes from
A) the fission of uranium.
B) the fusion of helium into hydrogen.
C) the fission of helium into hydrogen.
D) the fusion of hydrogen into helium.
E) None of the above.
D
You might also like to view...
The linear momentum of a 40.0 kg object moving around a 90.0 m circle at a constant speed of 7.60 m/s is
a. 0.0 kg m/s b. 304 kg m/s c. 1155 kg m/s d. 27360 kg m/s
In the operation of a steam-electric generating plant, the thermal energy input occurs
A) in the electric generators. B) in the condenser. C) at the point where the energy from the furnace is transferred into the boiler. D) at the point where the fossil or other fuel is shipped into the plant area. E) at the point where the hot steam pushes against the turbine.
To estimate the distance in kilometers of a flash of lightning, count the number of seconds between seeing the flash and hearing the accompanying thunder, then divide by
A) 2. B) 3. C) 4. D) 5. E) none of the above
According to general relativity, a photon emitted by a star
A) loses energy. B) reduces in frequency. C) is red-shifted. D) all of the above E) none of the above