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3 years ago

Which of the following would make a good semiconductor?

Biology

2 answers:

madam [21]3 years ago

3 0

<em>The answer to this question is germanium</em>

lakkis [162]3 years ago

3 0

Answer : The correct option is, (B) Germanium

Explanation :

As we know that the material are divided into three categories which are conductors, insulators and semiconductors.

Conductors : It is a type of substance which conduct electricity that means it allow the electrons to flow through them.

Example of conductors are, iron, aluminium, gold, etc.

Insulators : It is a type of substance which does not conduct electricity that means it does not allow the electrons to flow through them.

Examples of insulators are, glass, rubber, ceramics, etc.

Semiconductors : It is a type of substance which conduct electricity under certain conditions that means it allow the electrons to flow through them. The conductivity level of semiconductors lie between the conductors and the insulators.

The good examples of semiconductors are silicon, germanium, gallium, and selenium.

In the given options, aluminium, gold are the metals which conduct electricity and concrete is an insulator which do not conduct electricity while the germanium is the good semiconductor.

Hence, the correct option is, (B) Germanium

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4 years ago

Suppose you are an astronomer, and a child asks you to explain how long it takes light to travel through space. In your own word

densk [106]

Light speed, or 300,000 kilometers a second, might seem like a speed limit, but this is just an example of 3 + 1 thinking – where we still haven’t got our heads around the concept of four dimensional space-time and hence we think in terms of space having three dimensions and think of time as something different.

For example, while it seems to us that it takes a light beam 4.3 years to go from Earth to the Alpha Centauri system, if you were to hop on a spacecraft going at 99.999 per cent of the speed of light you would get there in a matter of days, hours or even minutes – depending on just how many .99s you add on to that proportion of light speed.

This is because, as you keep pumping the accelerator of your imaginary star drive system, time dilation will become increasingly more pronounced and you will keep getting to your destination that much quicker. With enough .999s you could cross the universe within your lifetime – even though someone you left behind would still only see you moving away at a tiny bit less than 300,000 kilometres a second. So, what might seem like a speed limit at first glance isn’t really a limit at all.

To try and comprehend the four dimensional perspective on this, consider that it’s impossible to move across any distance without also moving through time. For example, walking a kilometer may be a duration of thirty minutes – but if you run, it might only take fifteen minutes.

Read more at: <span>https://phys.org/news/2011-10-light-speed.html#jC</span>

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3 years ago

Classification of living things takes into consideration all of the following except

GarryVolchara [31]

Classification of living things takes into consideration of everything, except A. The number of cells the organism is found to have.

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3 years ago

A mutation may be passed along to human offspring

s344n2d4d5 [400]

Answer:

true

Explanation:

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3 years ago

(FW.02]The diagram below shows a portion of the water cyle.

Simora [160]

Answer:

I would have to say recharge of the aquifer by using ground water after some precipitation.

Explanation:

Melting snow or rain increases ground water that percolates down to replenish the aquifer.

Elevation changes causes the aquifer to flow up in low spots/springs on the surface. And the cycle repeats through evaporation and plant respiration.

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3 years ago