The energy released from a nuclear reaction is equal to:
a. energy associated with momentum conservation.
b. the exothermic endothermy.
c. energy associated with the change in mass.
d. the total charge involved.
c
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Which would require the greater energy; slowing the orbital speed of a satellite so it crashes into Earth, or increasing the orbital speed so it escapes Earth?
A) slowing down B) speeding up C) same each way
Chemically, helium is
A) an isotope. B) an element. C) a mixture. D) a solid. E) a compound.
Two people, one twice as massive as the other, attempt a tug-of-war with 12 m of rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of
A) 3 m. B) 4 m. C) 5 m. D) 6 m.
An expandable container holds 2.30 mole of helium, He, gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa
How much heat is gained by the gas during this process? (R = 8.31 J/mol ? K) A) 1280 J B) 792 J C) 685 J D) 1370 J E) 1700 J