transistor
transistor
Vaccum tubes use a lot of power and give off heat.
An electric fire is one possibility.
Heat lamps and remote control devices.
By 'devices' do you mean nuclear weapons, or peaceful uses of nuclear power?
The uses of heat energy is a bulb, sunlight. flashlight, power for your house
The are many different uses for laser devices. However, the high powered ones are usually used in devices not generally available to the public, including many types of weapons.
Geothermal power
Insulation from heat/cold/concussive shock & also drinking cups, floatation devices & insulation.
Andy hess likes men :]
Heat, Light, Manufacturing, Transportation
Power = energy / time. For example, if a devices uses an ENERGY of 1000 Joules in 10 seconds, then during those 10 seconds it uses a POWER of 1000/10 = 100 Watts.