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Sindrei [870]
3 years ago
8

Chemical composition describes

Physics
1 answer:
nordsb [41]3 years ago
3 0
Chemical composition refers to the arrangement, type, and radio of atoms in molecules of chemical substances. Chemical composition varies when chemicals are added or subtracted from a substance, when the radio of substances changes, or when other chemical changes occur in chemicals.
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Electrical energy is used to turn the blades of a fan. The amount of energy transformed is seen here : 750 J electrical energy i
Charra [1.4K]

Electrical energy is used to run the fan

Here as per given condition 750 J of electrical energy is used to run the fan which is converted into Kinetic energy as 400 J

So here we can see that 350 J of energy is lost against many other type of frictional and resistive loses.

So here we can say that out of 750 J of energy only 400 J is used to run the fan and rest amount of energy is lost against friction.

also we can say that efficiency of this fan will be

\eta = \frac{Useful}{Total}

\eta = \frac{400}{750}

\eta = \frac{8}{25}


3 0
2 years ago
When an electron is displaced in a semiconductor, the hole that's left behind is
morpeh [17]

Answer:

A. attracted to the negative terminal of the voltage source.

Explanation:

When an electron is displaced in a semiconductor, the hole that's left behind is

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The electron leaving leaves a net + charge, which is attracted to the negative terminal.

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If a baseball is in space and someone hits it with a bat what does the ball do
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Answer:

It's will fly like float

Explanation:

Since in space there is no gravity that everything can float

3 0
3 years ago
Mandy is testing an unknown solution to determine whether it is an acid or a base. She places a piece of red litmus paper into t
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The solution is a base
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The kinetic energy <br> as the roller coaster goes downhil
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Answer:

Increases

Explanation:

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as the roller coaster goes downhill

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Read 2 more answers
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