Briefly explain how ultraviolet (UV) radiation reduces Mars's atmosphere
What will be an ideal response?
A process that has reduced Mars's atmosphere is the planet's lack of an ozone layer to screen out UV radiation. Solar UV photons can break atmospheric molecules up into smaller fragments. Water, for example, can be broken by UV into hydrogen and oxygen. The hydrogen then escapes into space, and the oxygen easily combines chemically with rocks and soil to form oxides. Iron oxide (rust) in the soil gives Mars its reddish landscape.
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At 96°F the saturation density of air is 0.04 kg/m3 . If the weather report says the relative humidity is 90% when the temperature is 96°F, the humidity is 0.036 kg/m3
Indicate whether the statement is true or false
Saturn’s rings look bright because __________.
a. light from the Sun reflects off the material in the rings b. the material in the rings is hot and creates its own light c. light from Saturn reflects off the material in the rings
A conducting sphere contains positive charge distributed uniformly over its surface. Which statements about the potential due to this sphere are true? All potentials are measured relative to infinity. (There may be more than one correct choice.)
A) The potential is lowest, but not zero, at the center of the sphere. B) The potential at the center of the sphere is zero. C) The potential at the center of the sphere is the same as the potential at the surface. D) The potential at the surface is higher than the potential at the center. E) The potential at the center is the same as the potential at infinity.
Tomatoes have a higher specific heat capacity than dough. This means that when you bite into a hot pizza
A) the dough feels hotter than the tomato sauce. B) the tomato sauce feels hotter than the dough. C) since sauce and dough are at the same temperature, neither feels hotter.