Which of the following is a true statement about objects in a vacuum?
a. a feather will fall faster than a bowling ball.
b. a feather will fall slower than a bowling ball.
c. a feather and a bowling ball will fall at the same rate.
d. both a feather and a bowling ball can't fall, but will always remain motionless.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

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

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?