If a certain sample of an ideal gas has a temperature of 109°C and exerts a pressure of 1.2 x 104 Pa on the walls of its container,
how many gas molecules are present in each cubic centimeter of volume? The ideal gas constant is 8.314 J/mol • K and Avogadro's number is 6.022 × 1023 molecules/mol.
2.3 × 1018 molecules
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Spiral galaxies are much more common in the centers of rich clusters than in the universe as a whole
Indicate whether the statement is true or false
Observer A sees a pendulum oscillating back and forth in a relativistic train and measures its period to be TA. Observer B moves together with the train and measures the period of the pendulum to be TB. These two results will be such that
A) TA > TB. B) TA = TB. C) TA < TB. D) TA could be greater or smaller than TB depending on the direction of the motion.
When light reflects from mirrors we see a ________ reflection.
Fill in the blank(s) with the appropriate word(s).
In radioactive decay, when the parent material decays to one-quarter of its original amount, the time is
A) one half-life. B) two half-lives. C) three half-lives. D) four half-lives.