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Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

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

Aplane travels 1000 miles in 5 hours .what is the planes average speed?