The vector r, starting at the origin, terminates at and specifies the point in space (x, y, z). find the surface swept out by the tip of r if (a) (r-a) a-0. characterize a geometrically (b) (r-a) r 0. describe the geometric role of a. the vector a is constant (in magnitude and direction).

4. who was the first one to measure the speed of light and conclude that it is finite? 5. who was the first philosopher who thought the speed of light is finite? 13. what is the speed of light numerically? 14. give an example of something moving faster than light 15. give an example for some particles or waves that

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

What will a positive and a negative charge do if they are separated from each other?