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Pie
3 years ago
9

What type of device is a coal-fired power plant?

Physics
1 answer:
Anuta_ua [19.1K]3 years ago
4 0

D. A heat engine that uses heat to do work

Explanation:

A coal fired power plant is a heat engine that uses heat to do work.

A heat engine is a device that is used to convert heat energy into mechanical energy .

A heat pump uses mechanical energy to produce more heat from a lower heat sink.

  • A coal power plant produces heat by firing the coal.
  • Heat from the coal combustion heats water to steam.
  • The steam is used to drive heavy turbines
  • The turbine has mechanical energy and it then produce electricity.

learn more:

Renewable resource brainly.com/question/4344417

#learnwithBrainly

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How many electrons can possess this set of quantum numbers: principal quantum number n = 4, magnetic quantum number mℓ = −1?
LekaFEV [45]

Answer:

6 electrons

Explanation:

To solve this question lets determine the possible quantum numbers for the principal quantum number n = 4.

For the quantum number l which describes the shape of the orbital, we have the possible values : 0 to n-1.

Thus, for n = 4 the l can assume the values 0, 1, 2, 3 ( 4 possible shapes )

For the angular quantum number, ml, which tell us the orientation in space,we have the values - l to + l.

So lets determine the number of orbials which can have the values -l for n=4

l = 0   ml = 0

l=  1    ml = -1,0,1

l= 2    ml = -2, -1, 0, 1, 2

l= 3    ml = -3,-2,-1,0,1,2,3

So we have three orbital with ml = - 1 and from Pauli´s exclusion principle we can have up two electrons in each orbital. Thus for n= 4 we can have up to 6 electrons with ml = -1

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3 years ago
Which of the following is true about magnetic poles?
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5 0
3 years ago
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Which property of the wave makes it-(C)
AlekseyPX

Answer:

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Which characteristic does an object with a constant acceleration always have?
Alexus [3.1K]

By definition, speed is the integral of acceleration with respect to time.

We have then:

v = \int\limits^t_0 {a} \, dt

As the acceleration is constant, then integrating we have:

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an object with a constant acceleration always have:

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