What must be known to find an object's average speed? *direction and time
*distance and time
*displacement and direction

What causes most sediment to wash or fall into a river

The fact that the total amount of energy in a system remains constant is a(n)

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.