Answer: The correct answer is : The critical density for the universe is approximately 10 ^ -26 kg / m ^ 3 or you can also say 10 hydrogen atoms per cubic meter.
Explanation: This value is given by:
critical density = 3H ^ 2/2 Pi G, where H is the Hubble constant and G is Newton's gravitational constant.
Critical density is the average density of matter necessary for the universe to stop its expansion but after an infinite time.
Ancient Egyptians:
Did keep animals as pets.
By having interviews with each candidates
The steps of energy production in this diagram of a coal-fired power plant is as follows:
- In the furnace, coal is burned.
- Combustion heat causes water to boil.
- The turbine is powered by steam.
- To create current, magnets are transported past copper coils.
- Condensation and cooling of steam.
- Air contaminants are removed through filtering.
- Toxic ash is transported to a place for disposing of hazardous trash.
<h3>Write a short note on power plant.</h3>
Power plants are typically connected to a grid. In many power plants, a rotating device known as a generator is used to convert mechanical power into three-phase electric power. The movement of a conductor in relation to a magnetic field results in the creation of an electric current. The generator can be powered by a wide range of different energy sources. Most power plants across the world use fossil fuels like coal, oil, and natural gas to generate electricity. Examples of low-carbon power sources include nuclear energy and the rising use of renewable energy sources including solar, wind, geothermal, and hydroelectricity.
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The complete question is as follows:
Moving clockwise, label the steps of energy production in this diagram of a coal-fired power plant.
well here's why
Since opposite charges attract each other, the negatively charged electrons are attracted to the positively charged protons. Tell students that this attraction is what holds the atom together. Explain to students that in a hydrogen atom, the negatively charged electron is attracted to the positively charged proton.
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