A water desalination plant is set up near a salt marsh containing water that is 0.15 M . Calculate the minimum osmotic pressure that must be applied at 20.°C to purify the water by reverse osmosis. Assume is completely dissociated.

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

Moving force of air flows from areas of high pressure to areas of low pressure true or false

Mathematically, work = force x distance at coaster world, the tallest rollercoaster is the pinnacle. the top of the first hill is 40 meters high. it takes 160 newtons of force to bring a car to the top of the first hill. it takes 10 seconds to get to the top of the hill. how much work is done? how fast are you travelling, on average, to the top of the first hill? find the  force, distance, time, work, average speed