An atom that has a negative four charge will have which of the following? question 1 options: 4 more protons than electrons an equal amount of protons and electrons 4 more electrons than protons 2 more neutrons than protons

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion

Veronica’s velocity was measured as 4.3 m/s. she displaced 20 meters in 4.7 seconds. which piece of information is missing for the correct calculation of velocity? the starting point the direction the end point the time per meter