Eforce acting between two charged particles a and b is 5.2 × 10-5 newtons. charges a and b are 2.4 × 10-2 meters apart. if the charge on particle a is 7.2 × 10-8 coulombs, what is the charge of particle b? (k = 9.0 × 109 newton·meters2/coulomb2)

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

What happens to an isotope during radioactive decay?