When an electron is removed from a neutral atom, it becomes
A) a positive ion.
B) a negative ion.
C) heavier.
D) a bipolar atom.
E) more massive.
A
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Define specific heat at constant pressure.
What will be an ideal response?
What was Erwin Schroedinger's main contribution to the development of quantum theory?
A) He explained the photoelectric effect, in terms of photons. B) He found a way to predict the overall statistical patterns that appear in the double-slit experiment with electrons and other experiments. C) He discovered the uncertainty principle. D) He found a way to predict the precises position at which electrons or other particles will strike the viewing screen in such experiments as the electron double-slit experiment. E) He discovered the nonlocality principle.
A 2.00-kg ball has zero potential and kinetic energy. Maria drops the ball into a 20.0-m deep well. After the ball comes to a stop in the mud, the sum of its potential and kinetic energy is:
a. 392 J. c. 784 J. b. -392 J. d. zero.
An adiabatic free expansion of a gas in a thermally isolated container is not reversible because
a. work must be done on the gas to return it to its original volume. b. heat must be exchanged with the surroundings to return the gas to its original temperature. c. its internal energy has a greater value after the expanded gas is returned to its original volume and temperature. d. of all of the above. e. of (a) and (b) above only.