Physical World ...

Sometimes the tubes in the well-inflated tyres of a cycle left in the sun burst open

The common balance works on the principle of equality of

The instrument connected with the recording and reproduction of sound is called

A red and a green pencil are taken in a room illuminated with green light. In the room

What metallic wire is fused in glass?

Light pollution is caused when

Astronomers have discovered a bizarre, hexagon-shaped feature in the clouds of Saturn near the planet's north pole. The feature was first seen in images sent by the

Sudden fall of a barometer reading indicates

If two substances of equal volumes but of different densities are dropped from the same height simultaneously, then

A sharp knife cuts much better than a blunt one because