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Anna11 [10]
3 years ago
9

Where does our energy from from?

Biology
1 answer:
NISA [10]3 years ago
5 0
Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix. These sources originate mostly in our local star, the Sun. Electricity falls into its own category because it's an energy carrier and not a primary source.
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A new microorganism is isolated from a lake and is placed into a solution of KCl. The voltage difference across its membrane is
Leona [35]

Answer: \Delta U= 1.922x10⁻²⁰ Joules

Explanation: <u>Electric</u> <u>Potential</u> <u>Energy</u> (U) is the energy a charged object has due to its location in an electric field and it will only exist with the object is charged.

<u>Voltage</u> or <u>Electric</u> <u>Potential</u> <u>Difference</u> (V) is external work done to move a charge from one point to another in a electric field.

These terms have a relationship, which is given by:

\Delta U=q\Delta V

where

q is the charge

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1mV = 10⁻³J

Then:

V = 120x10⁻³

V = 0.12

So, for a proton to move from the negative side of a membrane to the positive:

\Delta U=q\Delta V

\Delta U=1.6.10^{-19}.0.12

\Delta U = 1.922 x 10⁻²⁰

Energy necessary to transport a proton from negative side of the membrane to the positive is 1.922 x 10⁻²⁰J.

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3 years ago
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Answer:

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