If a body is whirled in a circle, then the work done on it ___.
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Which of the following does NOT contribute to sparkling of diamonds?
In a concave mirror when the object is placed at infinity which of the following applies to the image?
Knife is an example for
The acceleration due to gravity at the surface of the earth (mass M and radius R) is proportional to ___.
During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________________.
Which of the following instruments is used to measure electric current?
What does the symbol R in electricity stand for ?