The food calorie, equal to 4186 j, is a measure of how much energy is released when the body metabolizes food. a certain fruit­and­cereal bar contains 140 food calories. (a) if a 65­kg hiker eats one bar, how high a mountain must he climb to "work off" the calories, assuming that all the food energy goes into increasing gravitational potential energy? (b) if, as is typical, only 20% of the food calories go into mechani- cal energy, what would be the answer to part (a)? (note: in this and all other problems, we are assuming that 100% of the food calories that are eaten are absorbed and used by the body. this is actually not true. aperson's "metabolic efficiency" is the percentage of calories eatenthat are actually used; the rest are eliminated by the body. metabolic efficiency varies considerably from person toperson.)

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

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.

What are two examples of phase changes that skip a phase during transition?