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Gauss' law for magnetic fields
The magnetic flux by a closed surface is zero; no magnetic charges present. In differential form,
div B = 0.
Question: The resistance-per-length of the wire is wire's resistivity. Answer: Resistivity has units of ohms per meter therefore as regards wire it is certainly natur
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How much does automotive oil weigh? As rough guide engine oil generally weighs about 0.87 kg/litre or about 7.2 pounds per US gallon unfortunately a rough answer is the best th
Simple 'spring' balance Punch four holes in an old tin lid with a nail, spacing them partially round the circumference. Pass pieces of string by these holes and tie them togeth
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Draw a graph showing the variation of potential energy of a p of nucleons as a function of their separation. Show the regions in which nuclear force is (i) attractive, and (ii) rep
Does upthrust change in different liquids (examples please)
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Making a sun-dial To withstand all weather, a sun-dial should be form of metal or painted wood. A cardboard model can be formed for easy experiments. The gnomon which casts
what is the discussion of motion in one dimension for experiment 7
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