i. Based on which feature the waves are classified as mechanical and electromagnetic ii. What is the characteristic of sound which depends on the amplitude of a wave

The temperature of a heated liquid can be measured by a mercury thermometer

i. The bulb of the thermometer is immersed in the liquid to measure the temperature of the liquid. By which method the heat is transmitted to mercury through the bulb of the thermometer from the liquid
ii. Due to which feature of mercury it is used in thermometers?​