Explain what are wave fronts?
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what is difference b/w scr &rectifier&mechanism of triac experiment
Explain why are metals able to conduct current so well?
is it possible that the clock works differently in winter and in summer ?
Mercury is a better barometric fluid than water because?
When a toy balloon is filled with air and then the air is allowed to go out, why dies the balloon whiz away ?
Explain what is free fall acceleration?
What is sonar ( sound navigation and ranging )?
What is Lunar module?
Explain the difference between the atomic theory and the kinetic theory?
Mention the applications of electron microscope. : quantum physics
What is Heat ?
Explain which way do twin screw props on a boat rotate when propelling the boat forward?