Explain what is the difference between diffraction and interference?
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Does sunlight reflected off a mirror increase the temperature of the sun-rays?
What is the difference between isolation transformers and step up or step down transformer?
Which of the surfaces of a thermos flask are silvered and why?
Explain about Vacuum Pump?
Explain the difference between a lens and a mirror?
How does laser printer works?
How will you make the clock go fast ?
Explain what affect does electricity have on soil?
Laser is an acronym for what?
Explain one advantage of a scanning electron microscope over a transmission electron microscope?
a car starts from rest with uniform acceleration "a" for sometime and then with uniform retardation "b" and comes to rest. The time of motion is "t". find the maximum velocity attained by it?
battery of 180 AMP HOUR”