Energy

Energy stored in your muscles, which ultimately comes from the food you eat.

Energy that is not converted to useful energy is typically referred to as wasted energy. This can occur in various forms, such as heat loss in machinery or friction in moving parts, leading to inefficiencies in energy systems. Minimizing wasted energy is essential for improving energy efficiency and reducing environmental impact.

Solar energy can be converted into electricity using photo-voltaic cells which are piezo-electric components and create a current when they are in light.

Solar energy is also converted to usable heat using water based solar panels connected to a buildings radiators or hot water supply.

Solar energy can also be converted into potential energy by certain wavelengths energising electrons in an atom to move to a different energy level. This is normally released back as light but will be a certain colour dependant on the wavelength absorbed.

Solar energy can also be used to assist chemical reactions in plants using photosynthesis

Nuclear power plants use nuclear energy, specifically the energy released from splitting atoms in a process called nuclear fission. This energy is converted into heat, which is used to generate steam to turn turbines and produce electricity.

The energy transformation that occurs in a shredder is typically mechanical energy being converted into thermal energy and sound energy. The shredder's motor provides mechanical energy to power the blades, which then chop up the material, generating heat due to friction and sound as the blades rotate.

There are ten major energy resources in use by humans today. These ten sources in order from most used to least as listed on the NEED (National Energy Education Development project) website:

Petroleum - 37%

Natural gas - 23.5%

Coal - 22.6%

Uranium - 8.5%

Biomass - 3.5%

Hydropower - 2.5%

Propane - 1%

Wind - .5%

Geothermal - .4%

Solar - <.1%

In a traffic light system, electrical energy is converted to light energy in order to illuminate the traffic lights, and then light energy is converted back to electrical energy in the sensors that detect vehicles and trigger changes in the light signals. Additionally, kinetic energy is converted to electrical energy in some traffic lights when vehicles drive over sensors installed on the road surface.

Examples of indirect energy use include the energy embedded in products and services we consume, such as the energy used in manufacturing, transporting, and disposing of goods. Other examples include embodied energy in buildings and infrastructure and the energy used in water treatment and waste management processes.

A mixer typically uses electrical energy to power its motor, which rotates the mixing blades or beaters. The electrical energy is converted into mechanical energy to facilitate the mixing process.

Yes, in an iPod, electrical energy from the battery is converted into thermal energy due to resistance in the electronic components and circuits. This thermal energy can be a byproduct of the energy transfer process and can contribute to the overall energy loss in the system.

Opossums get their energy by consuming a varied diet that typically includes fruits, insects, small animals, and even carrion. They have a high metabolism and are mainly nocturnal, which allows them to actively forage for food during the night to meet their energy needs.

The most traditional sources of energy come from fossil fuels such as coal, oil, and natural gas. These fuels have been used for centuries to generate electricity and power various forms of transportation and industrial activities. However, their use has led to environmental issues such as air and water pollution and climate change.

A car with higher crash worthiness can better absorb and disperse energy during a collision, reducing the force felt by occupants. This helps minimize injuries by preventing excessive transfer of energy to the occupants. Features like crumple zones, airbags, and seat belts work together to protect passengers during a crash.

When thermal energy is added to dry ice (solid carbon dioxide), it undergoes sublimation and directly changes from a solid to a gas, without passing through a liquid phase. On the other hand, when thermal energy is added to regular ice (solid water), it melts into liquid water, and then if more energy is added, it evaporates into steam (water vapor).

Solar energy is the primary source that drives evaporation on Earth. The heat from the sun warms the surface of water bodies, causing the water to evaporate and form water vapor in the atmosphere.

In a convection current the kinetic energy will most likely be a small part of the total as the rate of flow won't be very high. Most heat transfer in convection will be simply thermal energy transfer, ie from a warmer place to a cooler one.

This is a simple little problem once you get your mind to it. Let the mass be M kg and the max height of the swing be H meters (that is the height of the mass above its lowest point, not the length of the swing).

Max velocity = 4 m/s, so max kinetic energy (KE) = 1/2 x M x 42 = 8M

We are assuming the potential energy (PE) at max height = kinetic energy at lowest point, ie no losses due to friction. Max PE = M x G x H where G = the gravitational constant.

So we have PE = KE = M x G x H = 8 x M, M cancels out and H = 8/G. Then substituting back for H, max PE = 224 = M x G x 8/G, G cancels out and M = 224/8 = 28 kg.

An example of water continuously giving off thermal energy until it freezes is when you leave a glass of water in a freezer. As the water's temperature decreases, it releases thermal energy to the surrounding air until it reaches the freezing point, forming ice crystals.

It is called an endothermic process or reaction. In an endothermic process, thermal energy is absorbed from the surroundings, causing a decrease in temperature.

Devices like speakers and headphones use sound energy to produce vibrations, which can then be converted into electrical energy to power LED lights. This can be seen in products like light-up headphones or speakers with LED light features.

It could be consumed by scavengers or broken down by decomposers.

Nuclear binding energy is the energy that holds nucleons (protons and neutrons) together in an atomic nucleus. It is derived from what is called mass deficit. Each nucleon in the atom gives up a tiny amount of its mass when the atom is created. This mass in converted into binding energy.

A cooling system must do work to transfer thermal energy because it needs to overcome the second law of thermodynamics, which states that heat naturally flows from a hot object to a cooler object. The cooling system works by actively moving heat from a colder region to a warmer one, which requires input of energy to maintain this temperature difference.

Boiling water typically uses thermal energy, which is the energy associated with heat. When water reaches its boiling point, the thermal energy added to the water causes the water molecules to gain enough kinetic energy to break free from their liquid state and change into vapor.