A 1.2 kg object moving with a speed of 8.0 m/s collides perpendicularly with a wall and bounces off with a speed of 6.0 m/s in the opposite direction. If the object is in contact with the wall for 2.0 milliseconds, what is the magnitude of the average force on the object by the wall

Why do astronauts in the space shuttle weigh less?

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=