The picture below shows a person swinging a yo-yo in a circle. B
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Which vector shows the velocity of the yo-yo at this moment?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?