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Aloiza [94]
3 years ago
10

What is the correct energy transformation in a hydropower dam?

Chemistry
1 answer:
mars1129 [50]3 years ago
3 0

Answer:

Gravitational to Mechanical to electrical

Explanation:

In a hydropower dam, the gravitational potential energy is converted to mechanical energy which in turn produces electrical energy.

  • The gravitational potential energy is due to the water overhead and the position of water inside the dam.
  • The height and quantity of water determines the magnitude of the gravitational potential energy.
  • Then, this energy is released when it falls on turbines and it drives them.
  • As the turbine moves, mechanical energy is produced.
  • The turbine is connected through a dynamo which produces a electric current by the turning action.
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If 41grams of water at 24°C absorbs 2208 J of heat energy, what will be the final temperature of the water?
aleksklad [387]
The problem can solved using the heat equation which is expressed as:

H = mCΔT

 where H is the energy absorbed or released, m is the mass of the substance, C is the specific heat capacity, and ΔT is the change in temperature.

2208 J = 41 g x 4.18 J/g·°C x ( T - 24 °C) 
T = 36.88 °C

5 0
3 years ago
PLEASE HELP! Find out whether the chemical equation is balanced or unbalanced.
nordsb [41]

One chemical reaction is called the Haber process, a method for preparing ammonia by reacting nitrogen gas with hydrogen gas:


This equation shows you what happens in the reaction, but it doesn’t show you how much of each element you need to produce the ammonia. To find out how much of each element you need, you have to balance the equation — make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.


You know the reactants and the product for this reaction, and you can’t change them. You can’t change the compounds, and you can’t change the subscripts, because that would change the compounds.


So the only thing you can do to balance the equation is add coefficients, whole numbers in front of the compounds or elements in the equation. Coefficients tell you how many atoms or molecules you have.


For example, if you write the following, it means you have two water molecules:


Each water molecule is composed of two hydrogen atoms and one oxygen atom. So with two water molecules (represented above), you have a total of 4 hydrogen atoms and 2 oxygen atoms.


You can balance equations by using a method called balancing by inspection. You take each atom in turn and balance it by adding appropriate coefficients to one side or the other.


With that in mind, take another look at the equation for preparing ammonia: HOPE THIS HELPS



4 0
3 years ago
Is a tree burning a chemical or physical change
Sauron [17]
Chemical. Burning is a chemical process
8 0
3 years ago
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What is the atomic number of an element that has seven protons and eight neutrons and seven electrons?
Dmitrij [34]

Answer:

Nitrogen has an atomic number of 7 (Z=7) because it has 7 protons in its nucleus. Some nitrogen atoms have an atomic mass number of 15 (A=15). A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons

7 0
3 years ago
Read 2 more answers
A battery has an electrical ______________ energy
aleksley [76]

Answer:

Electrical Energy

Explanation:

There are a variety of chemical and mechanical devices that are called batteries, although they operate on different physical principles. A battery for the purposes of this explanation will be a device that can store energy in a chemical form and convert that stored chemical energy into electrical energy when needed.

5 0
3 years ago
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