Two charged particles are attached to an x axis: Particle 1 of charge -2.00 *10^7 C is at position x=6.00 cm and particle 2 of charge +2.00*10^7 C is at position x=21.0 cm. Midway between the particles, what is their net electric field in unit-vector notation?

The gravitational attraction between two objects will if one object acquires more mass .

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)