The diagram above illustrates a beaker of water being heated. It is observed that as the bubbles rise they get bigger in size.The reason for this observation is
Which of the following devices converts light energy to electrical energy?
A motor of a corn mill machine operates on electrical energy of \(1.44 \times 10^{5}\)J. If one-quarter of the energy is wasted on sound and heat, determine the efficiency of the machine.
Thermal energy added or removed from a substance that changes the state of the substance is called
The maximum density of water occurs at a temperature of
