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Flauer [41]
3 years ago
13

A shallow hole is dug and lined with concrete. A number of large black plastic bags, each filled with several centimeters of wat

er, are placed in the hole and then covered with fiberglass insulation panels. The panels let sunlight in but keep most of the heat stored in the water during the daytime from being lost to the atmosphere. This heat can then be used to heat water and space. It cannot be used to generate electricity. This technology is called:
Physics
1 answer:
Liula [17]3 years ago
8 0

Answer:

Freshwater solar ponds or freshwater floating collector type solar pond.

Explanation:

A shallow hole is dug and lined with concrete. A number of large black plastic bags, each filled with several centimeters of water, are placed in the hole and then covered with fiberglass insulation panels. The panels let sunlight in but keep most of the heat stored in the water during the daytime from being lost to the atmosphere. This heat can then be used to heat water and space. It cannot be used to generate electricity. This technology is called freshwater solar ponds or freshwater floating collector type solar pond.

  • This type of solar pond technology is introduced to provide a cheap, renewable heat source which is used mainly for space - heating purposes. The freshwater solar pond is covered with floating collectors/ fiberglass insulation panels which are made of thin plastic sheet, insulation board and it also requires a little constructional work.
  • In summary, the collector also provide thermal and evaporation insulation so that fresh water may be used when the pond gives reduction of mean collector and pond temperature and ensures high efficiency through forced flow in collector layer of pond.

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E- The star becomes a red giant (LATEST STAGE)

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A- The shell of hydrogen surrounding the star's nonburning helium core ignites.

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B- Pressure in the star's core decreases (EARLIEST STAGE)

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3 years ago
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2 years ago
How can a 1kg ball have more kinetic energy than a 100kg ball? Explain both using words and by providing a numerical example
MariettaO [177]

1 kg ball can have more kinetic energy than a 100 kg ball as increase in velocity is having greater impact on K.E than increase in mass.

<u>Explanation</u>:

We know kinetic energy can be judged or calculated by two parameters only which is mass and velocity. As kinetic energy is directly proportional to the (velocity)^2 and increase in velocity leads to greater effect on translational Kinetic Energy. Here formula of Kinetic Energy suggests that doubling the mass will double its K.E but doubling velocity will quadruple its velocity:

\text { Kinetic Energy }=\frac{1}{2} m v^{2}

Better understood from numerical example as given:

If a man A having weight 50 kg run with speed 5 m/s and another man B having 100 kg weight run with 2.5 m / s. Which man will have more K.E?

This can be solved as follows:

\text { Kinetic Energy of } \mathrm{A}=\frac{1}{2} 50 \times 5^{2}=625 \mathrm{J}

\text { Kinetic Energy bf } \mathrm{B}=\frac{1}{2} 100 \times 2.5^{2}=312.5 \mathrm{J}

It shows that man A will have more K.E.

Hence 1 kg ball can have more K.E than 100 kg ball by doubling velocity.

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3 years ago
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