1 year has 8766 hours, therefore a 100 watt bulb uses up 0.1 x 8766 units of electricity, that is 876.6 units. If coal was burnt to produce the energy, about 250 kg of coal (550 pounds) would be needed.
Yes, leaving a light bulb will damage the environment because the energy used to light the bulb comes from a coal fired station and whilst the light is on, coal is burnt which releases carbon dioxide into the air which may contribute in global warming.
In the 19th century, light bulbs were powered by electricity generated from sources such as coal, water, or gas. These power sources were used to create light by heating a filament inside the bulb until it produced light.
The bulb is usually made of: Soft glass made from silica, trona (soda ash), lime, coal, and salt.
To light a 100 W light bulb, you need to generate 100 W of power. If the power plant is 30% efficient, you need 100/0.30 = 333.33 W of input power. Since coal has 30E6 J/kg of energy, you would need 333.33 W/30E6 J/kg = 0.0111 kg of coal to light the 100 W bulb.
The energy for a light bulb typically comes from electricity flowing through the filament, which heats up and produces light. The electricity is usually supplied by power plants that generate electricity through various means such as burning coal, natural gas, or using renewable sources like wind or solar.
Coal mining has not stopped. I was inspecting an operating mine last week.
Fossil fuels such as coal, oil, and natural gas. Biomass from plants and organic materials. Hydrocarbons in gasoline and diesel fuel. Chemical reactions in batteries and fuel cells. Nuclear reactions in uranium and plutonium.
(as) black as coal (as) black as coal Completely black; totally without light or color.
Actualy coal does not become light at all! Coal is commonly used as burning material to power something, but i guess people could burn it for light by lighting it on fire, yet the coal is just the fuel that is feeding the flame. Hope i helped :D
A coal power plant can generate electricity continuously as long as it has a steady supply of coal to burn. The lifespan of a coal power plant can vary, but with proper maintenance and upgrades, they can operate for several decades.
By burning coal
Coal is considered opaque and does not allow light to pass through it easily. This lack of transparency is due to the high carbon content and various impurities present in coal, which absorb light rather than allowing it to pass through.