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A 10cm x 10 cm x 10cm block of steel (steel = 7900 kg/m3) is suspended from a spring scale. The scale is in Newton’s.
1) What is the scale reading if the block is in air?
2) What is the scale reading after the block has been lowered into a beaker of water and is totally submerged?
A fountain shoots a jet of water 10 m into the air. The fountainhas a round nozzle of diameter 1.84 cm at ground level, fed by a pump located 6 m belowground through a round pipe of diameter 5.19 cm .
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what is the magnetic field at the edge of a 1 m diameter capacitor having a 1 mm gap charging with a 1 a instantaneous
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