Two particles with charges 2q and q are separated by a distance r. The 2q particle has an electric field E at distance r and exerts a force F on the q particle. When the q particle is replaced by a 4q particle, what will be the electric field and force from the 2q particle experienced by the 4q particle

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Observations show that interstellar clouds can have almost any shape and

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?