An archaeologist finds an ancient wooden relic and obtains its count rate as 20 counts per minute per gram of sample. the count rate obtained form the bark of a living tree is 104 counts per minute per gram and the background count rate is 8 counts per minute what is the approximate age of the relic? 44 [radioactive carbon chas a half life of 5600 years] 3000 years 1000 years 17 000 years 22 000 years (a) (b) (c) (d) 3006

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

Agirl throws a ball. if the ball's acceleration is 12 m/sec/sec and its mass is 0.5 kg, how much force did the girl apply to the ball?

Am i correct on these two physics questions?