four equal point charges of +3.0uC are placed at the four corners of a square that is 40cm on a side. Find the force on any one of the charges​

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?