When thomas edison was promoting the wide use of direct current, this personal enemy of edisons was the chief proponent and expert in alternating current?

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When a radar gun says the pitch is 90 miles per hour at what point in the balls travel to home plate is the radar gun measuring the velocity?

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If f equals electric force, and q and q (read as: q-prime) are the charges on two particles, the expression f is proportional to q times q prime divided by distancesquared is what law?

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which wave is related to telecommunication?

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What are the characteristics of dead stars?

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How long does the light from sun take to reach us?

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What is Kinetic Energy ?

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Explain the Vapour pressure ?

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What is Fahrenheit thermometer ?

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explain Tides

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Explain the Mortar ?

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assuming friction is negligible, if a lever has a mechanical advantage of 5, how much effort in newtons is needed to lift a 10 newton load?

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