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If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?
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An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?
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Which type of eclipse makes the sun appear in the form of a ring?...
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