In an area in which electricity costs 8 cents/kilowatt-hour, a 5 kw clothes dryer runs for 90 minutes to dry a load of laundry. how much did it cost to dry these clothes?

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy