A soccer ball is kicked from the ground with an initial speed of 19m/s at an angle of 45 degrees above the horizontal. A player 55 m away in the direction of the kick starts running to meet the ball at the instant. What must be his average speed if he is to meet the ball just before it hits the ground?

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

The energy released by a nuclear fusion reaction is produced when

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?