What characteristic of water makes it the universal solvent?

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.