Two spaceships are approaching one another, each at a speed of 0.31c relative to a stationary observer on Earth. What speed, in terms of the speed of light, does an observer on one spaceship record for the other approaching spaceship?
What will be an ideal response?
0.57c
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Determine the molar analysis of standard air (79% N2, 20% O2, and 1% argon, by volume) with 100 ppm of radon gas at 101 kPa, 20ºC.
What will be an ideal response?
Which object has the most intense sunlight on it?
a. Mercury b. Venus c. Earth d. Mars
The mass of 1H is 1.007825 u and the mass of 1n is 1.008665 u. The mass of 12C is 12.000000 u, of 13N is 13.005739 u, and of 14N is 14.003074 u. What is the binding energy of the last neutron in 14N?
A) 10.6 MeV B) 9.8 MeV C) 1.9 MeV D) 2.5 MeV E) 3.8 MeV
Global warming
a. has not yet been observed. b. has been caused by increasing levels of carbon dioxide in the atmosphere. c. has led to a depletion of the ozone layer in the atmosphere. d. has no serious consequences.