. A boy with a mass of 50 kg needs to keep afloat in the pond. All he has is wood with a 500 kg m density. Find the minimum weight of the block of wood to keep him just afloat. Assume that the wood he holds to keep afloat is entirely submerged in the water. [p water = 1,000 kg m³]

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Q: Explain and compare ohmic and non-ohmic circuit elements

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.