120 J of work was done to lift an object 6 m above the ground. How much force was applied to this
object and what was its mass?
Select one:

120 N, 5 kg

20 N, 3.04 kg

720 N, 12.3 kg

20 N, 2.04 kg

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

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Give an example in which the electrical energy changes to light energy