Aball player hits a home run, and the baseball just clears a wall 21.0 m high located 130.0 m from home plate. the ball is hit at an angle of 35.0° to the horizontal, and air resistance is negligible. assume the ball is hit at a height of 1.0 m above the ground. a. what is the initial speed of the ball? b. how much time does it take for the ball to reach the wall? c. find the components of the velocity and the speed of the ball when it reaches the wall

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

Select all the correct answers. which three statements about electromagnetic radiation are true?