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Digiron [165]
4 years ago
14

What must happen to the electrons in a material to create an electric current?

Physics
2 answers:
zhenek [66]4 years ago
8 0
You have to have electrons that are in the materials conduction band. Then you apply a voltage across the material. 
Free_Kalibri [48]4 years ago
3 0
For the electrons in a material to create an electric current THERE MUST BE FLOW OF THE ELECTRONS, CHARGES MUST FLOW CONTINUOUSLY FROM ONE POINT TO ANOTHER.Electric current refers to the continuous flow of electric charges through a material. For an electrons to flow in a material, the material must be a conductor.
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You are heating an iron to iron the shirt you're going to wear to school tomorrow. Which of the following best describes the tra
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Answer:

electrical to the thermal

Explanation:

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3 years ago
The isobars in the conventional series that will be needed to complete the pressure analysis between the lowest and highest valu
Tresset [83]

The isobars in the conventional series that will be needed to complete the pressure analysis between the lowest and highest values on this map are: 1008, 1012, 1016, 1020.

 

To add, an isobar is <span>a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.</span>

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3 years ago
A roller coaster car starts from rest at the top of a hill 15 m high and rolls down to ground level. From there it starts into a
Softa [21]

Answer:

955.5N

Explanation:

The normal force is given by the difference between the centripetal force and gravity at the top of the loop:

F_N = F_C - F_G = m\frac{v^{2} }{r} - mg

mass m = 65kg

radius of the loop r = 4m

velocity v = ?

g = 9.8 m/s²

To find the centripetal force, you need to find the velocity of the car at the top of the loop.

Use energy conservation:

E_{tot}=mgh + \frac{1}{2} mv^{2}

At the top of the hill:

E_{tot}= mgh_{hill}

At the top of the loop:

E_{tot}=mgh_{loo}_p +\frac{1}{2} m v^{2}

Setting both energies equal and canceling the mass m gives:

gh_{hill} = gh_{loo}_p + \frac{1}{2} v^{2}

Solving for v:

v^{2} = 2g(h_{hill}-h_{loo}_p)

Using v in the first equation:

F_N = \frac{2mg(h_{hill}-h_{loo}_p)}{r} - mg

F_N = 955.5N

7 0
3 years ago
A seamount is an isolated land mass rising from the ocean floor.<br> a. True<br> b. False
iris [78.8K]
The answer is A, True.
7 0
3 years ago
What evidence supports the conclusion that a chemical reaction has occurred?
GalinKa [24]

Answer:

Precipitation formed

Temperature change

fizzing and hissing

bubbles

change in state

Explanation:

3 0
2 years ago
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