Heat Part 4 Quiz

Mercury's high thermal expansion ensures sensitivity, good conductivity gives quick response, and shiny appearance provides clear visibility for accurate thermometer readings.

Birds fluff feathers to trap air, which acts as an insulator and significantly reduces heat loss through conduction and convection.

Pendulum length increases with summer heat, increasing period T∝L, so clock runs slow (loses time).

Wind speed increases the rate of evaporation. Wind speeds up the escape of molecules by removing saturated air from the liquid surface, allowing more evaporation.

Thermal soaring allows birds to soar without flapping wings. They circle in rising warm air currents (thermals), gaining lift to maintain altitude effortlessly.

Heat capacity C=m×c, where mass m and specific heat capacity c determine total heat needed for temperature change.

Steam releases latent heat of vaporization during condensation, plus sensible heat from cooling to skin temperature, causing greater total heat transfer.

Higher pressure raises the boiling point of water, enabling higher cooking temperatures for faster cooking while preventing steam escape.

Gaps allow for thermal expansion, so the bridge doesn't crack when it gets hot.

Water absorbs a lot of heat before getting hot, like oceans staying cool in summer.