What is unusual about the rotational (spin) and orbital periods of Venus?
What will be an ideal response?
Venus' day is actually longer than its year. It takes longer to spin once on its axis than to complete one orbit around the Sun.
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Suppose we compare the combined mass of a C atom and an O2 molecule, both at rest, with the mass of a CO2 molecule, also at rest. According to Einstein's theory, the combined mass of the C and O2 is
A) slightly less, by an amount so small that it hard to measure, than the CO2 molecule's mass. B) precisely equal to the CO2 molecule's mass. C) considerably more than the CO2 molecule's mass. D) considerably less than CO2 molecule's mass. E) slightly more, by an amount so small that it hard to measure, than the CO2 molecule's mass.
The search for Earth-like extraterrestrial life is essentially a search for
A) energy B) liquid water C) oxygen D) carbon
Oxygen accounts for approximately ________ % of the air that surrounds us.
What will be an ideal response?
In ultrasound the wavelength of the sound is much smaller than in normal sound
Indicate whether the statement is true or false