April 2, 2018 Exam 3 Review s to give up energy in order to become ice at 0 C 2.

Question

April 2, 2018 Exam 3 Review s to give up energy in order to become ice at 0 C 2. Sound travels faster gh cold, denser air than through warm, less dense air. B. False 3. The upper limit of hearing for is 0°c is 45°C? Speed of sound in air is A. 0.0179 m B. 0.0179 s C. 0.0179 em/s a, 000170ed of sound in air sns is 20,000 z What is the corresponding wavelength if the af D. 0.0179 J 4. A on the sidewalk. From how much higher would you water balloon dropped from a dorm window does no need to drop the balloon to double the speed of impact A. Twice as high B. Three times as high. C. Four times as high. D. Eight times as high. rubbin each other and that Piece B and Crep silk, and each other. This means A. pieces A and C have opposite sign charges. B. pieces A and C have the same sign charge. piece C with nylon. It is now observed that piece A and B repei with nylon ng from threads and thenea ch is charged by n bbing p ce A with fur piece Buit each other, ce C. piece B does not have a charge. D all three pieces have the same sign charge The electrical force is much weaker than the force of gravity True B. False ng the separation of charges, is it possible to have a high voltage without any current? AYes . No bird lands on a non-insulated, 80,000-volt high line. Will it receive a shock? Yes 0 en an object acquires a negative charge it actually gains mass. loses mass. as a constant mass.

Explanation / Answer

3)

Wavelength has units of meter (m), so the answer is A : 0.0179 m

4)

v = sqrt(2gh)

So, by making (h) 4 times, we get v to be 2 times

So, answer is : C) 4 times

8)

NO . it wont receive any shock as the circuit is not completed

9)

IT actually gains mass as negative charge too has mass.

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