Question

(b) Name three devices/industries in which heat
energy is put to some useful work.
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Answer 1

The devices/industries in which heat

energy is put to some useful work are following:

Heat engines, such as the internal combustion engine used in cars, or the steam engine (Heat → Mechanical energy)

Ocean thermal power (Heat → Electrical energy)

Hydroelectric dams (Gravitational potential energy → Electrical energy)

Electric generator (Kinetic energy or Mechanical work → Electrical energy

Answer 2

car , train and bus are vehicle