The number of particles is given by n = -D [2−1/ 2−1] are crossing a unit area perpendicular to x-axis in unit time. N1 and n2 are the number of particles per unit volume for the value of meant to be 1 2. What is the dimensional formula of diffusion constant D?

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

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Does heating a metal wire increase or decrease its electrical resistance? why?