2points
which describes free fall?
o
a. when gravity and air resistance act on a falling object.
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b. when only gravity acts on a falling object.
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c. when an object is thrown downward against gravity.
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d. when no gravity acts on a falling object.

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?

Ineed the answer to question 1 , i’m desperate

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and