Anail is partially inserted into a block of wood, with a length of 0.0300 m protruding above the top of the block. to hammer the nail in the rest of the way, you drop a 20.0 kg metal cylinder onto it. the cylinder rides on vertical tracks that exert an upward friction force of 16.0 n on the cylinder as it falls. you release the cylinder from rest at a height of 1.50 m above the top of the nail. the cylinder comes to rest on top of the block of wood, with the nail fully inside the block. use the work-energy theorem to find the speed of the cylinder just as it hits the nail.

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

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?