This category contains questions and answers related to energy conservation.
Asked in Physics, Energy, Energy Conservation
What are 5 examples of energy transformation?
Five examples of energy transformation: television-electrical energy->light energy->sound energy->heat energy car-chemical energy->mechanical energy->sound energy->heat energy light bulb-electrical energy->light energy->heat energy rubber duck-kinetic energy->elastic energy->sound energy match-chemical energy->light energy->heat energy
What are good insulators?
How can humans reduce the amount of carbon dioxide being put into the atmosphere?
Reducing the amount of carbon going to the environment is only part of the battle, we must also increase the amount of carbon dioxide presently in the atmosphere. A out of the carbon (as carbon dioxide) is generated by fossil fuel , so task one is to reduce this use. The use of biofuels is not really the answer as we can burn biofuels quicker than they can be produced by plants. That leaves us with the options of colder homes, less air conditioning, streetlights, reducing shipping or flying in food from distant lands during the winter and prohibiting private car use. Or we could use sustainable sources like solar, wind and tidal energy to meet out need. Nuclear too is an option - no carbon emissions there. It is often suggested that we end our carnivorous diet. The animals produced for the food use resources, create methane (GHG) and require shipping from farms to slaughter and to market. This is going to be unpopular as just not eating the existing animals does not stop the emissions. The change would require the slaughter and disposal of 19 billion chickens, 1.4 billion cattle, and 1 billion sheep and pigs. Lower population is a potential answer but being told that everyone over the age of (fill in the blank) has to be put down, or controlling on a worldwide basis who gets to have kids. This is going to be unpopular. We could also look where the carbon removal is going on: forests are disappearing, they use carbon dioxide so we need to replant the trees and reduce the clear cut processes to create new agricultural land. the warmer ocean is absorbing less carbon and killing off the marine growth to use it up. We need to work on all GHGs including methane from thawing permafrost and deep sea hydrates
Asked in Energy, Energy Conservation, Scientific Method
What flows through a coil of wire wrapped around a bar of iron making electromagnets?
Asked in Energy Conservation, Oil and Petroleum
What are the advantages and disadvantages of using petroleum?
There are numerous advantages to petroleum both as a fuel and as a raw material: It has high energy density. You don't need mch to provide a significant amount of usable energy Production systems are simple Storage and transportation systems are simple For transportation it feeds an established distribution bas Safety hazards (and safe handling procedures) are well understood Systems for use as a fuel are simple Spills and leaks are controllable using existing technology As raw material in chemical synthesis it is extremely flexible As to disadvantages: Over use can create local and global problems It is limited resource which can be used up by wasteful procedures Petroleum gas harms the environment, as it's unnatural. It's crude oil put through a LARGE amount of changes to get it to become a viable source of combustion. If it spills, which is a common occurrence, it is costly and most times harmful to the ecosystem to remove. Those are the disadvantages.
Asked in Physics, Energy, Mechanics, Energy Conservation
Why doesn't the principle of mechanical energy conservation hold in situations when frictional forces are present?
Asked in Physics, Geography, Energy Conservation
Give examples of energy transformation?
Here are some examples of energy transformation: Potential energy of a waterfall transforms to kinetic energy, moving the turbines, and then its transformation to electric energy through the turbo-generator system. Electrical energy goes through a toaster and turns into thermal energy or heat then sound when the toast is done. When you rub your hands together, your hands become warm. Mechanical energy due to motion is changed into heat. A television: Electrical energy--> light energy--> sound energy A firecracker: Heat to Chemical to Sound/Light. Reason being is that the source of the Chemical PE is heat in the match, which lights the fuse. Chemicals then burst when the heat hits the firecracker, and it creates a crack and it sparks. A light bulb: electrical to light and heat The energy used to blow a trumpet is transformed into sound. Sound: Clang two cymbals together. Part of the energy from the collision is transferred into sound. Heat: I skid on my knees on a wooden floor. I will eventually come to a stop, because the energy I used to skid is lost to friction and heat (which help cause those nasty wood burns). Kinetic: I jump out of a plane with a parachute. My potential energy is transformed tokinetic energy as I fall. Potential: I go up an elevator. My potential energy increases the higher I am from the ground. Chemical: Two hydrogen atoms react and form one dihydrogen molecule. Energy is stored in the bond formed between the two atoms. Nuclear: Nuclear power plants use nuclear fission and fusion in controlled reactions to generate energy.
What are the advantages and disadvantages of energy conservation?
Energy conservation is a hot topic nowadays. It is known that the temperature of the earth is rising every year. This is due to the fact that CO2 is emmissed into the atmosphere. Also heat is emmissed into the atmosphere. Being that heat is a form of energy, one can easily see why we should conserve our energy. Nowadays researchers are working on sustainability. This means that processes are changed to reduce heat emmission and make use heat more effective. This means that part of the heat can be reused, which is an another benefit for heat conservation. The downside of heat conversation is an economical one. It costs more money to make more sustainable processes and to have less heat emmission. This is why the sustainability process is going slowly and our earth temperature is still increasing
Asked in Physics, Mechanics, Energy Conservation
In what way is a machine subject to the law of energy conservation?
What is the the difference between built and natural environment?
Heat balance diagram?
Heat Balance Diagram is representation of Second Law of thermodynamics. in fact it represents the whole cycle of heat inputs and outputs from a steam cycle (generally) especially in case of Thermal Power Stations. Specifications of different components can be identified through Heat Balance Diagram(HBD) thus it helps a lot and indispensable tool while Engineering the Thermal Power Station (TPS) In fact some commercial software are also available for Heat Balance Diagram. "Simple Heat Balance", "Thermoflow", FCycle are few to name. A comparatively new in this list is Simple Heat Balance, which provides quite accurate results and my team reported me its very intuitive and easy to work with.
Slogan for save electricity?
Flip It Off. You Have the Power to Conserve. WHEN IT IS BRIGHT, SWITCH OFF THE LIGHT Conservation: It doesn't cost. It saves If you don't wanna pay it save it Switch off! Or be Switched off. Save power, energize the future Don't be a thug, pull the plug Watt problem? Turn that light…. off at night! The amount of electricity we waste these days….. is shocking TODAY'S WASTAGE IS TOMORROW'S SHORTAGE 'Let there be light' - for our grandchildren Give the earth a hug, pull the plug. If we don't change, Tomorrow we will be literally 'power'less The electric bill won't give you a fright if you remember to turn off the light Keep the future bright, Turn off the light.
Asked in Physics, Energy Conservation
What are three good insulators?
Asked in Chemistry, Kinematics, Energy Conservation
What is the principle of the conservation of Energy?
The law of conservation of energy states that the total amount of energy in an isolated system remains constant. A consequence of this law is that energy cannot be created nor destroyed. The only thing that can happen with energy in an isolated system is that it can change form, i.e. kinetic energy can become thermal energy. Albert Einstein's theory of relativity shows that energy can be converted to mass (rest mass) and mass converted to energy. Therefore, neither mass nor pure energy are conserved separately, as it was understood in pre-relativistic physics. Today, conservation of "energy" refers to the conservation of the total mass-energy, which includes energy of the rest mass. Therefore, in an isolated system, mass and "pure energy" can be converted to one another, but the total amount of energy (which includes the energy of the mass of the system) remains constant. Another consequence of this law is that perpetual motion machines can only work perpetually if they deliver no energy to their surroundings. If such machines produce more energy than is put into them, they must lose mass and thus eventually disappear over perpetual time, and are therefore impossible.
What are Jacques Cousteau's major accomplishments?
What is the importance of conserving energy?
A first reason for conserving energy is that we use energy that often comes from the burning of fossil fuels. Industry, transport and the generation of electricity largely use fossil fuels. When these fuels are burned they release carbon dioxide that has been sequestered away for millions of years. This extra CO2 is adding to the greenhouse gases in the atmosphere and contributing to an enhanced greenhouse effect. This is causing the planet to warm up dangerously. Another reason for conserving energy is to save oil. We are often reliant on other countries for oil. If we can find other renewable sources of energy, then we can keep the oil for other uses, like plastics. Soon we will run out of oil and the oil prices will increase as we dig deeper and farther.
Asked in Energy Conservation
What does transforming energy mean?
This may be oversimplistic, but I'll give it a shot. I think in many cases energy can be thought of as motion or potential motion (i.e. when you hold an apple in the air it has potential energy because if you let it out of your hand it will fall and gain motion or kinetic energy). The transformation of the energy can either be a change from one type of motion to another (for instance, a baseball gains kinetic energy after being hit off of a tee, but its gain is the loss of the baseball bat and the batter so the energy was transferred), from potential motion to motion(a roller coaster at the top of a peak on the track will gain kinetic energy as it begins to plummet but it will lose gravitational potential energy), or from motion to potential motion (as the roller coaster moves down one hill and up another one unassisted, its kinetic energy is returned to gravitational potential energy; hence it slows down as it moves up the hill, but it gains gravitational potential energy once again and will therefore be able to accelerate down the other side of the hill). There are, of course, many other types of energy transformations.