Heat Test - 5...

The freezing point on a thermometer is marked as 20° and the boiling point as 150°. A temperature of 60°C on this thermometer will be read as

The study of physical phenomena at low temperature (below liquid nitrogen) is calledrefrigeration

Gaps are kept between railway tracks because

During severe winter in low temperature zones of the world, the superficial parts of the lakes are frozen leaving water below. The freezing at the bottom is prevented because

During severe winter in low temperature zones of the world, the superficial parts of the lakes are frozen leaving water below. The freezing at the bottom is prevented because

If we touch a piece of copper and another piece of glass at 40^oC, then copper will feel hotter because

The radiating power of a body depends on

If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor of