Energy

There are many sources that humans can get their energy from. Humans typically get their energy from different food sources.

No, wind energy is the kinetic energy generated from moving air, while mechanical energy is the sum of both kinetic and potential energy in an object. Wind energy is a form of mechanical energy as it involves the movement of air particles to generate power.

Mechanical energy is the sum of kinetic energy (energy of motion) and potential energy (energy stored in an object due to its position or shape). An example of mechanical energy is a rolling bowling ball: it has both kinetic energy as it moves and potential energy due to its position above the ground.

Solar energy is converted into a usable form through photovoltaic cells, which are commonly found in solar panels. These cells capture sunlight and convert it into electricity through the photovoltaic effect. This electricity can then be used to power homes, businesses, and other applications.

Advantages of radiant energy include its clean and renewable nature, as it comes from natural sources like the sun. It is also widely available and can be harnessed using solar panels. However, a disadvantage is its intermittent availability, as it relies on weather conditions and daylight hours. Additionally, the initial installation cost of solar panels can be high, although this is offset by long-term savings on energy bills.

Sunlight is a form of energy that travels from the sun to the Earth in the form of electromagnetic radiation. This energy sustains life on Earth through photosynthesis and helps provide warmth and light.

When a ceiling fan is turned on, electrical energy from the outlet is converted into mechanical energy to spin the blades. This mechanical energy then moves the air in the room, leading to a transfer of kinetic energy from the fan blades to the air molecules, creating a cooling effect.

The energy transferred in a sequence is the total amount of energy moved from one point to another. This can include the energy transferred through different forms, such as heat, work, or radiation, depending on the specific type of sequence being studied. To calculate the energy transferred in a sequence, one would need to consider the initial and final energy states and any losses or gains in between.

A TV primarily emits light energy in the form of visible light and heat energy in the form of infrared radiation. Additionally, it also emits some electromagnetic radiation and sound energy through its speakers.

Lipids store energy in their chemical bonds through a process called metabolism. When lipids are broken down during metabolism, the energy stored in their bonds is released to fuel cellular processes. This energy is in the form of ATP, the main energy currency of cells.

As thermal energy is added to a substance, its temperature increases, causing its molecules to move faster and vibrate more. This can lead to changes in state, such as melting or boiling, depending on the substance and the amount of thermal energy being added.

Objects at rest may have stored energy due to their position or state. For example, a stretched rubber band has stored elastic potential energy, while a charged battery has stored chemical potential energy. This energy can be released and converted into other forms of energy when the object is in motion or interacts with its surroundings.

A lit dynamite stick converts chemical energy stored within it into thermal and mechanical energy. When ignited, the chemical bonds in the dynamite break down rapidly, releasing energy in the form of heat and pressure, resulting in an explosive reaction.

When the sun's energy reaches the Earth's atmosphere in the form of radiation, some of it is absorbed by the atmosphere, some is scattered back into space, and the rest reaches the Earth's surface. This energy warms the Earth and plays a crucial role in supporting life through processes like photosynthesis and climate regulation.

Burning biomass is considered better than burning oil or coal because biomass is a renewable energy source that can be produced sustainably, whereas oil and coal are fossil fuels that contribute to greenhouse gas emissions and climate change. Additionally, burning biomass can help reduce waste by using organic materials that would otherwise be disposed of in landfills.

elastic potential energy:]
The rubber band has strain energy, equal to the band 1/2 spring constant times the square of the stretch. This is converted to kinetic energy when released.

A book placed on a shelf, a coiled spring, and water stored in a dam all have potential energy.

The built-in potential is the potential difference established at the junction of two different materials, such as a p-n junction in a semiconductor device. It arises due to the electrostatic forces that separate the charge carriers across the junction, creating a barrier for the flow of current. This potential is an important parameter in determining the behavior of semiconductor devices.

Cell phones use thermal energy generated by their internal components, especially the battery and processor, during operation. This thermal energy is a byproduct of the energy conversion processes that occur within the device and can affect its temperature. Heat dissipation mechanisms, such as heat sinks and thermal pads, help to manage and dissipate this thermal energy to prevent overheating and maintain the device's functionality.

The bike at the top of a hill would possess potential energy due to its elevated position.

Humans use energy stored in food to fuel their muscles and perform physical work. When we eat food, our bodies break it down and convert it into ATP, which serves as the energy currency for our cells. This ATP is used to power muscle contractions and enable movement.

When a man bats a ball, the chemical energy in his muscles is converted into kinetic energy as he swings the bat. When the bat makes contact with the ball, some of the kinetic energy is transferred to the ball, causing it to move. The sound produced as the ball is hit also represents a transformation of energy from kinetic energy to sound energy.

When objects rub against one another, mechanical energy is converted into thermal energy due to friction. The mechanical energy used to move the objects is transformed into heat energy, causing the objects to increase in temperature.

When you turn on a computer or a stove or a washing machine you are turning on things that use electricity and it transfers from electric to light or heat

In neutral atoms (with the same number of protons and electrons), the number of protons and electrons equal the atomic number. If our atom has 9 electrons, is neutral, and therefore has 9 protons, it is element #9: Flourine, which has an atomic mass of 19: 9 protons plus 10 neutrons.