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3 years ago

What is true about semiconductors?

Physics

1 answer:

Iteru [2.4K]3 years ago

3 0

In semiconductors, you can change how easily electrons move through them. That is option 2.

<h3>What are semiconductors?</h3><h3 />

Semiconductors is defined as those substances that possess the characteristics of both metal and non metal.

Examples of semiconductors include the silicon, germanium, and gallium arsenide elements.

The semiconductors are able to conduct electricity through the presence of electrons and holes in them.

The movement of these electrons can be controlled through the addition of impurities to the semiconductor material.

Therefore, in semiconductors, you can change how easily electrons move through them.

Learn more about semiconductors here:

brainly.com/question/1918629

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3 years ago

A plane flies 446 km east from city A to city B in 43.0 min and then 939 km south from city B to city C in 1.10 h. For the total

NeTakaya

Answer:

(a) Magnitude is 1039 km

(b) Direction of the displacement is $64.59^{\circ}$ South of East

(d) The direction of average velocity is $64.59^{\circ}$ South of East

(e) Average speed is 759.34 km/h

Solution:

Distance moved from A to B in East direction, $\vec{AB} = 446 km$

Distance moved from B to C in South direction, $\vec{BC} = - 939 km$

Time taken to move from A to B, t = 43.0 min = 0.72 h

Time taken to move from B to C, t' = 1.10 h

Now,

(a) The magnitude of displacement of the plane is provided by AC as shown in fig 1 and can be given as:

$AC = \sqrt{(AB)^{2} + (BC)^{2}}$

$AC = \sqrt{(446)^{2} + (- 939)^{2}}$ = 1039 km

(b) Direction of the displacement is given by:

$tan\theta = \frac{\vec{BC}}{\vec{AB}}$

$\theta = tan^{- 1}(\frac{- 939}{\vec{446}}) = - 64.59^{\circ}$

$64.59^{\circ}$ South of East

$v_{avg} = \frac{AC}{t + t'}$

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(d) The direction of the average velocity is the same as that of the displacement, i.e., $64.59^{\circ}$ South of East.

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