Joules = watts x seconds. Just convert the minutes to seconds, then multiply.
A flashlight has a power source (usually ordinary batteries), a light source of some sort (a light bulb or LED, for example), and some electrical wiring to connect them, with a switch to turn it on and off. The power source makes the light source give off light.
Solar cell is the device which converts the light energy to electrical energy it convert photons to dc energy for more information you can visit the several sight which can give you information about solar cell. it is semiconductor device fabrication is done by using silicon p-n junction.
the appliance will burn out, eg if it is a 60 watt light bulb it will burn at 120 watt for as long as the fillament can take it and that wont be long
All hot solids or dense enough gases emit black body radiation. Gases that are not very dense are are cold absorb particular wavelengths while gases that are not dense but are hot produce their characteristic emission spectrum.
Open the trunk lid and pull the upholstery from the rear of the trunk. You will find white and black plastic wing nuts. Remove the white ones on the side you are working on and swing the lens assembly up. If you don't like standing on your head to work on the lights, remove all of the white and black wing nuts and pull the tail light assembly to the rear. Replace the bulbs. Jack
THe light bulb emits light while in the process heat in the infrared spectrum is emitted.
It makes thermal energy (the heat), radiant energy (what we see), which is in essence more or less the same manifestation.
No. An energy saving light bulb is just a light bulb, and can't charge anything. The reason it's called an "energy saving" device is that it can give you the same amount of light while using less electrical energy than older bulbs used.
to give load from bulb to ballas
More watts means it uses more energy per second (watt is a unit of power). If it is a light-bulb of the same type of technology, the higher-watt light bulb would also give off more light.
Any of the wasted energy that is not converted to light will be converted to heat.Any of the wasted energy that is not converted to light will be converted to heat.Any of the wasted energy that is not converted to light will be converted to heat.Any of the wasted energy that is not converted to light will be converted to heat.
The job of a bulb is to give off heat and light energy
Both bulbs output the same amount of energy. The difference is in how much of that energy is output as heat vs the energy output as light. In a standard incandescent light bulb about 10% of the energy is output as light while the other 90% is output as heat. This makes the bulb only 10% efficient. For a florescent bulb the output of light is about 50% and the other 50% is output in heat. This means that a fluorescent bulb outputs five times as much light for the same wattage as a standard incandescent bulb, hence you can get the equivalent of 100 watts of light output for only 20 watts of electricity.
An incandescent bulb in an AC circuit does give off both heat and sound energy; the heat because the filament is hot, and the sound because the varying voltage results makes the filament vibrate. Generally it's not a very LOUD sound, but bulbs which are about to burn out often emit a noticeable buzzing.
75W means bulb which give 75W power when connected to domestic light. Power is nothing but energy per second. Thus energy consumed by bulb can be calculated as follows. E = 75*60*60*4J = 1080kJ
No, unless you hook it up electronically then it will probably not produce enough energy to light it up as bright or as long as and outlet.
Lights vary tremendously in power, but the normal incandescent bulb takes 100 watts. Low energy bulbs can give the same light at 20 watts