Amover hoists a 50 kg box from the ground to a height of 2 m. what was the change in the box's energy

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

What are the applications of electromagnetic waves

Simple machines can a. increase force only b. decrease force only c. increase or decrease force