Define Mass?

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For measuring weight of 2cm3 piece of density 4gm/cm3 which spring balance is best suited what is the range and least count how we calculate

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I just want to convert the voltage into current i.e. suppose I have 750V & 1A AC power then I want to convert it into 12V & 62A DC power only difficulty is that I don't want to use the tranceformer. Simply to say, I want to make the step-down without using tranceformer. Please, give me some ideas. And also I want the relation between Magnetic Induction & Weight of the body can be levitated. Or I can say, how much of magnetic induction requires to lift 500gms weight? I am heartily thankful to you.

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What are the characteristics of a musical sound?

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our breath can produce current?

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What is Virtual image ?

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What is sound?

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Explain the Radiation ?

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graph between frequency of photon and velocity of photo elrectron?

4 Answers   IIT,

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How does a sound wave travel in air?

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a ball of mass 500g moving with a velocity of 10m/s collides with another ball of mass 250g.after the impact,the second ball moved off with a velocity of 8m/s calculate the final velocity of the first ball.

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cyclotron

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