A roller coaster is travelling without friction as shown in the diagram. If the speed of the roller
coaster at A is 3.0 m/s, what is the speed at B?

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water