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Energy

The Energy category covers the description, definition, and use of all types of energy. Questions of a general nature can be put in the general Energy category. Other sub-categories exist for Fossil fuels, Nuclear energy, and renewables such as Wind, Solar, Hydro, Tidal, and Wave power.

24,905 Questions

The internal energy stored in the bonds between atoms is a form of potential energy that is sometimes called electromagnetic energy True or false?

True. The internal energy stored in the bonds between atoms is a form of potential energy that arises from the electromagnetic interactions between charged particles within the atoms. This energy is often referred to as electromagnetic energy.

What energy is the total energy of all of the particles in an object always flows from warmer matter to cooler matter?

The total energy is thermal energy, which is the sum of the kinetic and potential energies of all particles. This flow of energy from warmer to cooler matter is due to the second law of thermodynamics, which states that heat naturally flows from higher temperature regions to lower temperature regions until thermal equilibrium is reached.

If kinetic energy is increased by 60 percent then momentum will be?

Kinetic energy is proportional to the square of the speed; use this fact to calculate the increase in speed (60% increase means an increase by a factor of 1.6). Momentum is proportional to the speed.

A 100-W light bulb is turned on it has an operating voltage of 120 V how much energy is used each second?

A lamp will only operate at its rated power when subject to its rated voltage. So, provided your lamp is operating at its rated voltage (120 V), it's power will be 100 W, which means its consuming energy at the rate of 100 J/s.

At any other voltage, its operating power will change, and the rate at which it consumes energy will change too.

From what energy source does sunlight gets its energy?

Sunlight gets its energy from nuclear fusion reactions happening within the core of the Sun. These reactions involve the conversion of hydrogen atoms into helium, releasing vast amounts of energy in the form of light and heat.

Is a seismic wave caused by energy released as the result of rock movement along a fault?

Yes, a seismic wave is caused by the energy released when rocks along a fault move and break. This movement generates waves that travel through the Earth, causing vibrations that we feel as an earthquake.

Do glaciers causes erosion through plucking?

Yes, glaciers can cause erosion through a process called plucking. Plucking occurs when glacial ice freezes onto rocks and sediments, then plucks them away as the glacier moves, causing erosion. This process can help shape the landscape by carrying material and depositing it elsewhere.

Does a low-energy light-bulb create more heat in a room?

No, a low-energy light bulb generates less heat compared to traditional incandescent light bulbs. This is because low-energy bulbs convert more electricity into light, while incandescent bulbs produce more heat as a byproduct of light generation.

Only a small percentage of the electric energy fed into a light bulb is transformed into light what happens to the remaining energy?

The remaining energy is typically transformed into heat due to the resistance of the bulb's filament. This is why incandescent light bulbs are not very energy efficient. LED light bulbs, on the other hand, are more efficient as they convert more of the energy into light rather than heat.

What is a energy unit starting with c?

One energy unit starting with C is a calorie, which is a unit of energy commonly used in nutrition to measure the energy content of food. Another energy unit is a coulomb, which measures electrical charge.

Why do pipes burst at an extremely low temperature?

When water freezes it expands, as opposed to practically all other liquids. (For this reason ice fortunately forms on the TOP of ponds and lakes.) The expansion causes pressure to build up that could eventually burst the pipe. However, most water pipes burst because, as the ice builds up in the direction of the pipe, the water pressure continues to build up downstream from the growing volume of ice, that is between the ice and the faucet's. (Water pressure does not appreciably increase upstream as there is much more water on this side.) This enormous buildup of pressure can eventually cause the strongest of pipes to burst. It is a good idea to leave a faucet dripping if the pipe leading to it is in danger of freezing. Not only does this significantly reduce the chance of the water freezing in the pipe, but it keeps the water pressure from building up to dangerous levels that can cause bursting.

How much energy is released when a substance is cooled to its original temperature?

When a substance is cooled to its original temperature, no energy is released. Cooling a substance typically involves removing energy from the substance, but this process does not generate energy. The energy removed is used to lower the temperature of the substance.

An electric heater draws a current of 5 amps and its element has resistance of 50 ohms - if it's switched on for 5 minutes calculate the energy in kilo joule?

First, calculate the power of the electric heater using the formula P = I^2 * R, where I is the current and R is the resistance. P = 5^2 * 50 = 1250 watts. Convert the time from minutes to hours: 5 minutes = 5/60 hours = 1/12 hours. Calculate the energy used by the electric heater using the formula E = P * t, where t is the time in hours. E = 1250 * (1/12) = 104.17 watt-hours. Convert the energy to kilojoules by dividing by 3600 (since 1 watt-hour is equal to 3600 joules): 104.17 / 3600 = 0.029 kilojoules.

Why are proteins useful for us?

Proteins are the building material of our body. Proteins make up about 50% of dry body mass, our body uses protein to build and re-build damaged cells and tissues. As you can imagine, protein is therefore a very important nutrient…

What is the source of energy that flows through ecosystems?

The primary source of energy that flows through most living systems is glucose and carbohydrates. These energy sources are easy to produce and find.

Is solar power man made or is solar power natural?

Solar power is a energy that we get from sun it is used as a radiation of sun it is natural but the instruments that are made by people are converting solar power in other activities, the process of making this power is very expensive and every one cannot effort it that's why there are very few homes left which worked by solar energy.

How much energy in joules does a 3 kg vase possess when its placed on a shelf 2.5 meters above the ground?

The potential energy of the vase can be calculated using the formula: Potential Energy = mass * acceleration due to gravity * height. Plugging in the values: Potential Energy = 3 kg * 9.8 m/s^2 * 2.5 m = 73.5 Joules.

Suppose a fixed number of joules of energy as heat is added to 1 kg of substances listed below. Which substance will the rise in temperature be the least?

The substance with the highest specific heat capacity will experience the smallest rise in temperature with the same amount of heat energy added. Water has the highest specific heat capacity among common substances, so it will experience the least rise in temperature when a fixed amount of energy is added.

When high velocity water strikes turbine blades kinetic energy is converted to what energy?

The answer was potential energy, which surely is wrong. The energy generated is, self evidently, mechanical energy. This can then be used directly or indirectly to generate other forms of energy, typically water flow is converted directly into mechanical then pure electrical energy in a generator turbine, as at a Hydroelectric power station. Brian Catt CPhys.

How is most energy produced?

Most energy is produced by the breaking and reforming of molecular bonds. A car's combustion reaction in which fuel is converted into energy, co2 and water is a good example of this. Energy is rarely produced on the atomic level, such as a nuclear power plant or an atom bomb. Energy is produced this way through Einstein's E=mc^2. In an atomic reaction the mass of the products is slightly less then the mass of the reactants. Plug the change in mass into Einstein's equation and you get a lot of energy. To recap, most energy is made on the molecular level with endothermic (reactions which absorb energy) and exothermic reactions (reactions which emit energy), however a small amount takes place on the atomic level.

What is the potential energy of a car at a 25 meter hill?

The potential energy of the car at the top of a 25-meter hill is given by PE = mgh, where m is the mass of the car, g is the acceleration due to gravity, and h is the height of the hill. Assuming no friction or other energy losses, the potential energy at the top of the hill is equal to the kinetic energy at the bottom.

The entry point of solar energy in an ecosystem is?

Most solar energy enters an ecosystem when autotrophs (which are also called producers and are generally plants) use it to provide energy for photosynthesis. The process of photosynthesis stores solar energy in chemical bonds in glucose molecules, which can then be broken down later to produce energy through cellular respiration. Solar energy stored in plants moves up the food chain as consumers eat plants and are subsequently eaten by higher order consumers.

How do electrical charges flow?

The electrical charge that moves through a wire is in the form of negatively charged electrons. The movement of electrons in a circuit is called current. Electrons in a current are repelled from the negative end of the circuit and attracted to the positive end of the circuit.

In what way are greenhouse gases similar to blankets?

Greenhouse gasses allow sunlight into the Earth's atmosphere. Globally, about half of this energy is absorbed by the Earth's surface, and the other half is reflected back into space. When the Earth gives off this heat (in the form of longwave, infrared radiation) it is trapped by the greenhouse gasses. This is the reason that our planet is warm enough to live on, however, scientists believe that it is the basis for the general warming pattern the Earth is currently experiencing.

What captures the energy from sunlight and converts into chemical energy?

Chlorophyll is the pigment that captures sunlight in plants and algae. Through the process of photosynthesis, chlorophyll converts this light energy into chemical energy in the form of glucose and other carbohydrates.