Two rocks, one of mass 30 kg and the other of mass 60 kg, are separated by a distance of 1.0 m. They exert a gravitational force on each other of magnitude F. Which other pair of rocks exert a force of magnitude F on each other? A. a rock of mass 100 kg and a rock of mass 18 kg, separated by 1.0 m
B. two rocks, each of mass 45 kg, separated by 1.5 m
C. two rocks, each of mass 45 kg, separated by 1.0 m
two rocks, each of mass 60 kg, separated by 2.0 m

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.

Compare the patterns of the two waves shown in the image. which statement is true about these waves?

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.