State 'law of machines'?
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Why is one?s breath visible in cold, but not in not in hot weather ?
How many images will be formed if the angle between two mirrors is 90o ?
In general, alternating voltage varies between its maximum and minimum values 50 times per cycle. Why don't the circuit element show such fluctuation?
Explain what is centrifugal force?
Explain the difference between photodiode & photocell?
What is transverse wave motion?
Why dies starch stiffen the clothes ?
Explain the weights in pounds of liquid gallons?
Why current is denot with I ?
What is the Magnetic substance ?
What is physical significance of wave function? : quantum physics
Which atomic model did erwin schrodinger create?