The mass of a proton at rest is m. If the proton is moving so fast that its total energy is three times its rest energy, then what is the kinetic energy of the proton?
a. mc2
b. 2mc2
c. 3mc2
d. 4mc2
b
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Which of the following aging treatments of a precipitation-hardened alloy would be expected to result in the most stable precipitate particles?
(a) As-quenched (b) Under-aged (c) Aged to peak strength (d) Over-aged
A(n) ____________________ is a rapidly spinning neutron star that accelerates charged particles near the poles of its magnetic field
Fill in the blank(s) with correct word
How is quantum tunneling important to our existence here on Earth?
A) It plays a crucial role in nuclear fusion in the Sun, so that our Sun would not shine brightly without it. B) It explains how neutron stars are able to stay stable rather than collapsing under their strong gravity. C) It explains why electrons in atoms gradually fill different energy levels, thus making chemistry possible. D) It is important to understanding the law of conservation of energy.
A particle whose mass is 2 kg moves in the xy plane with a constant speed of 3 m/s in the x direction along the line y = 5. What is its angular momentum (in kg?m2/s) relative to the origin?
A.
B.
C.
D.
E.