An electron of mass 9.11 × 10^–31 kg has a momentum of 2.61 × 10^–22 kg·m/s. What is its speed?
a. 0.29c
b. 0.72c
c. 0.69c
d. 0.48c
e. It cannot have this momentum since it would require a speed greater than c.
c
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Observations of galaxies and clusters of galaxies indicate that about ____ percent of the matteruniverse is dark matter
a. 5 b. 25 c. 35 d. 45 e. 95
Fossils of early life are very difficult to identify in very old rocks because early life
A) was very simple and microscopic in size B) was not made of organic material that could be replaced by minerals C) was so different to life found on Earth today that we are not capable of identifying it D) did not leave behind any fossilized remains
I wish to use a positively charged rod to charge a ball by induction. Which statement is correct?
a. The charge on the ball will be positive. b. The ball must be a conductor. c. The ball must be an insulator that is connected temporarily to the ground. d. The ball is charged as the area of contact between the two increases.
The specific heat at constant volume per mole of 3R/2 is for what type of molecule?
a. monatomic b. diatomic c. polyatomic d. any type