What causes Mercury's 3:2 spin-orbit resonance?
A) the planet's closeness to the Sun
B) the planet's very eccentric orbit
C) the planet's high density
D) tidal torques operating on the planet
E) All of the above are factors.
E
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Excess atmospheric _______________ indicates that Venus once had substantial amounts of water on its surface
Fill in the blank(s) with correct word
A 5-mol ideal gas system undergoes an adiabatic free expansion (a rapid expansion into a vacuum), going from an initial volume of 10 L to a final volume of 20 L. How much work is done on the system during this adiabatic free expansion?
a. -50 J c. zero b. -10 J d. +50 J
An object with a temperature of 8000 K is brightest in the _________ and an object at 4000 K is brightest in the _________
a. infrared/ultraviolet b. visible region/infrared c. blue range/red range d. ultraviolet/green range e. ultraviolet/infrared
Aristotle's hypothesis was that:
A) lunar eclipses were created by our shadow. B) only a spherical Earth would always cast a circular shadow on the Moon. C) lunar eclipses would have to happen every full moon. D) the Sun lay at the center of the planet orbits. E) the Moon orbited the Earth.