Explain what is the direction of null vector?

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What is the universal law of universal gravitation?

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What makes the telegraph wires hum?

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Explain what is a newton meter?

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The throbbing caused by sounds of slightly different frequencies that results because of periodic constructive and destructive interference is called:

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Is there god and what is the difference between energy in space and so called goddly energy

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does plane mirror produce real image?how?

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Does weight affect how far you jump?

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How spectral lines show discrete energy levels in an atom. : quantum physics

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Why dies a cyclist and the cycle fall forward, if he applies the brakes suddenly ?

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When a toy balloon is filled with air and then the air is allowed to go out, why dies the balloon whiz away ?

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a truck A moving with a velocity of 30m/s collides with a stationary trolley B of mass 0.5tonnes after collision the two bodies were automatically connected.find their common velocities after collision if the mass of truck is 1.2tonne.

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