How might the middle layer contribute to your understanding of the history of the rock layers? How certain can you be?

Aproton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

How do you calculate the gravitational force on a rubber ball which has a mass of 50g

In the absence of friction, gravity, and all other external forces, what kind of speed will an object display if it travels from the bottom to the top of an inclined plane? a. constant speed b. increasing speed c. decreasing speed d. speed increases and then decreases e. speed decreases and then increases