Determine the torque relative to the origin
A block of 4.0 kg begins from rest on the positive x-axis 6.0m from the origin and after that consists of an acceleration given by a = 4.0i-3.0j in m/s^2. Determine the torque, relative to the origin, acting on it at the end of 3.0s.
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A laser beam in the air is incident on a liquid at an angle of around 38.0 degrees with respect to the normal. The angle of laser beam in the liquid is 27.0 degrees. Find out the liquid's index of refraction?
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