20.0 L of a monatomic ideal gas at a pressure of 100 kPa expand adiabatically until the volume doubles. What is the pressure in the gas at that point?
A) 31.5 kPa
B) 50.0 kPa
C) 200 kPa
D) 317 kPa
E) 400 kPa
A
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What is created by the fusion of three helium nuclei?
B) oxygen C) carbon D) nitrogen E) iron
During operation of a nuclear reactor, the 238U nuclei
A) absorb neutrons, which causes them to turn into plutonium. B) slow down the neutrons, thus improving the efficiency of the reactor. C) absorb neutrons, which causes them to turn into fissionable 235U. D) absorb neutrons, which slows down the chain reaction and thus controls the reaction. E) are fissioned by the neutrons, thus releasing nuclear energy.
What's an isotope?
a. a radioactive material b. an atom of an element with a different number of neutrons in the nucleus c. an electrically charged atom d. none of the above
Two objects are at rest on a frictionless surface. Object 1 has a mass that is twice that of Object 2. When a constant force is applied to Object 1, it accelerates for a time interval ?t. The force is removed from Object 1 and is then applied to Object 2. After Object 2 has been accelerated for the same time interval, which statements are true?
(i) p2 = 2p1 (ii) p2 = p1 (iii) p2 = ½ p1 (iv) KE2 = 2KE1 (v) KE2 = KE1 (vi) KE2 = ½ KE1
1.(i) and (vi) 2.(ii) and (iv) 3.(i) and (v) 4.(iii) and (v)