The distance between one point on a compression and the corresponding point on the next compression in a sound wave is called a? i had trouble with this question.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Ways that industry and agriculture use physical properties to separate substances

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?