A. four equal particles with positive charge q = 14.418x10-19 c and mass m = 81.99x10-31 kg are initially held at the four corners of a square of side l = 0.07 m. what is the total electric potential at the center of the square? (in v)

b. if these particles are released simultaneously, what will be their speed when they have separated by a very large distance? you may neglect gravitational effects. in (m/s)

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.

What is the momentum of a 2 kg object moving at 15 meters per second

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.