Acharge of +13 *10^-9 c is placed 0.25 m away from a charge of -23*10^-9 c. what will be the resultant electrical force? a. 4.3 *10^-5 c, attractive b. 4.3 *10^-5 c, repulsive c. 5.1 *10^-20 c, attractive d. 5.1 *10^-20 c, repulsive

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?