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galina1969 [7]
3 years ago
10

Movement of a molecule against its concentration gradient can occur through Select one or more: a. facilitated diffusion b. pass

ive transport c. osmosis d. simple diffusion e. active transport
Physics
1 answer:
uranmaximum [27]3 years ago
5 0

Answer:

The answer to your question is:

Explanation:

There are two kinds of cell transport passive transportation and active transportation.

Passive transportation does not need energy because molecules move from higher concentration to lower concentration.

Active transportation needs energy because molecules moves against concentration.  

a. facilitated diffusion It's an example of passive transportation so this answer is wrong.

b. passive transport Molecules move in favor of concentration so this answer is wrong.

c. osmosis is another example of passive transport so this answer is wrong.

d. simple diffusion it's another example of passive transport, so it's wrong this answer.

e. active transport this is the right answer.

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Answer:

The voltage across a semiconductor bar is 0.068 V.

Explanation:

Given that,

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Length = 0.1 mm

Area = 500 μm²

We need to calculate the resistivity

Using formula of resistivity

\sigma=n\times q\times \mu

\rho=\dfrac{1}{\sigma}

Put the value into the formula

\rho=\dfrac{1}{2.7\times10^{18}\times10^{6}\times1.6\times10^{-19}\times1000\times10^{-4}}

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Using formula of resistance

R=\dfrac{\rho l}{A}

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R=0.4\ \Omega

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Using formula of voltage

V= IR

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