As altitude increases in the troposphere and stratosphere, the air temperature
decreases in the troposphere and increases in the stratosphere
decreases in both the troposphere and stratosphere
increases in the troposphere and decreases in the stratosphere
increases in both the troposphere and stratosphere
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Which statement best explains why an object weight less on mercury than it does on earth

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.