What is the magnitude of the force that lifts a 5 newtown object straight upwards

Which describe reflection? check all that apply. light bounces off a boundary.

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

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.