How is radiation emitted from the body?
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When is fluorescence strong?
Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?
Why does a tennis ball bounce higher in Simla than it does in Culcutta?
What is non metals ?
How can you estimate the height of a bridge by dropping a stone from it ?
Explain about Barometer?
Explain interference?
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.
Why is it difficult to stand on stilts ?
Explain what is free fall acceleration?
What is the term for the speed at which an object will overcome the gravitational attraction of the earth?
What evidence is there supporting the big bang theory?