The transfer of heat from molecule to molecule, without movement of molecules from one place to another is
conduction
convection
radiation
either of these
The metal which has the highest thermal expansion.
Copper
Aluminium
Iron
Mercury
A clinical thermometer is made
to measure any temperature
to measure body temperature in oF
to measure body temperature in oC
to measure body temperature in Kelvin unit
Which of the following does not belong to the modes of heat transmission?
Conduction
Convection
Radiation
Condensation
Which is a wrong statement about radiation?
Radiation takes place only through vacuum.
Radiation takes place in vacuum also.
The heat of the sun reaches the earth through radiation.
The radiant heat reflects from smooth surfaces.
What difference between two places make wind possible?
Humidity
Temperature
Pressure
All of these
The metal that has more thermal conductivity
Zinc
The water at the surface of a water body gets heated by sunlight. But the water at the bottom does not get heated. The reason is
Very small amount of heat is reaching the bottom through conduction and convection.
Very small amount of heat is reaching the bottom through convection and radiation.
Very small amount of heat is reaching to the bottom through conduction and radiation.
Heat s not reaching at the bottom through conduction, convection and radiation.
The change that takes place when an iron is of 40oC temperature is immersed in water is of 50oC
The iron ball is cooled
The water boils
The temperature of iron ball increases
Temperature of water increases
The light ray responsible for solar heat.
X-ray
UV ray
Infrared ray
Radio ray
