Work is being done in which of these situations? all motions are at a constant velocity (including velocity = zero).
a. jessica pushes a 25 kilogram cart a distance of 10 meters.
b. bane carries a 20 kilogram box a distance of 50 meters.
c.
a weightlifter holds a 100 kilogram barbell over his head.
d.
all is trying to push a truck away from the parking lot.
e.
yana carries a 5 kilogram bag a distance of 1 kilometer.
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Utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must available hint(s)utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must pump water back into their cells to counter its loss due to osmosisactively pump water back out of their cells to counter its inflow due to osmosissynthesize membranes that are impermeable to substances that upset osmotic balanceactively pump salt back out of their cells to counter its inflow due to osmosis

It is really hard for me right know

Which best describes the difference between internal and thermal energy?