According to Newton's third law of motion , how many objects are involved in each force interaction?

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth's center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Rohit is trying to tune an instrument