What is the ultimate source of the energy derived from the burning of fossil fuels?
All the energy in oil, gas, and coal originally came from the sun, captured through photosynthesis. In the same way that we burn wood to release energy that trees capture from the sun, we burn fossil fuels to release the energy that ancient plants captured from the sun.
How does the amount of work done on an automobile by its engine relate to the energy content?
The energy content of the gasoline is greater than the amount of work done on an automobile by its engine. The difference is wasted — explaining that the engine is not perfectly efficient.
In what way is a machine subject to the law of energy conservation?
All machines are subject to energy conservation in that no machine can output more energy (do more work) than the energy put into it. … Machines cannot multiply energy or work input. To say that a machine has a certain mechanical advantage tells you how much the machine multiplies input force.
What are the 2 main forms of mechanical energy?
Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).
What are the 4 types of fossil fuels?
The four types of fossil fuels are petroleum, coal, natural gas and Orimulsion (capitalized because it is a proprietary, or trade, name).
Why is coal the largest source of power generation in the world?
Cheapest source of energy. It is by far cheaper than nuclear, natural gas, oil. … Coal also provides a stable source of energy (no Arab oil embargoes, no sudden scarcity like you experience with natural gas) and there is a very plentiful supply both in the U.S. and in other foreign countries.
Can we correctly say that a new source of energy is hydrogen?
Can we correctly say that hydrogen is a new source of energy? … No, hydrogen is not a source of energy, it is a carrier of energy. It is not a source of energy because it takes energy to separate the molecules of hydrogen.
What does it mean to say that in any system the total energy stay the same?
what does it mean to say that in any system the total energy score stays the same. Energy is conserved. in what sense is energy from coal actually solar energy? Material that forms coal was produced by sun’s energy.
Can you multiply energy?
No. To “multiply” energy implies to create energy and, by the First Law of Thermodynamics, that is impossible in a closed system. You can transfer energy, you can convert it from one form to another but you can’t *create* it.
How do you calculate work?
Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.
Is there a machine that is 100% efficient?
A simple machine, such as a lever, pulley, or gear train, is “ideal” if the power input is equal to the power output of the device, which means there are no losses. In this case, the mechanical efficiency is 100%.
What are 5 examples of energy transfer?
Examples of energy transfers include:
- A swinging pirate ship ride at a theme park. Kinetic energy is transferred into gravitational potential energy.
- A boat being accelerated by the force of the engine. …
- Bringing water to the boil in an electric kettle.
What are 5 mechanical energy examples?
10 Examples of Mechanical Energy in Everyday Life
- Wrecking Ball. A wrecking ball is a large round structure that is used for the demolition of buildings. …
- Hammer. …
- Dart Gun. …
- Wind Mill. …
- Bowling Ball. …
- Hydropower Plant. …
- Cycling. …