We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.
The friction between sand paper and metal sheet is very large, compared to that between the ordinary paper and the metal sheet. Thus the sand paper is able to remove the outer dull layer from the metal sheet more effectively and makes it more shining.
(a) On the first attempt four coins are overturned. Now, six coins are left.
In the next turn, four more are overturned. Now only two would be left. We take one...
Two possible compounds with molecular formula C3H6O2 are propanoic acid (CH3CH2COOH) and methyl acetate (CH3COOCH3). The propanoic acid reacts with Na metal to give sodium propanoate and H2 gas and...
(d) The steel rod will elongate, without any perceptible change in shape, but the rubber rod will elongate with the shape of the bottom edge tapered to a tip at...
As the ivory ball is more elastic than the wet-clay ball, it will tend to retain its shape instantaneously after the collision. Hence, there will be a large energy and...