(im on a study guide for (honors) physics and i have a test tomorrow. need on these questions)
1. a teenager pushes a 15 kg walmart cart with a force of 33 n to moves it down the aisle at a constant velocity. what is the coefficient of friction?
2. the coefficient of friction between a sled and some snow is .2 on a cold day. if a student can pull the 10 kg sled using a force of 15 n. what is the coefficient of friction?

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