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svet-max [94.6K]
3 years ago
13

A dry cell does 7.5 j of work through chemical energy transfer 5.00C between terminals of the cell . What is the electric potent

ial between the two terminals?
Physics
1 answer:
lisov135 [29]3 years ago
7 0
Here's a useful factoid that you don't hear about very often:

1 volt means 1 Joule per Coulomb.

When 1 coulomb of charge falls or gets lifted through 1 volt potential difference, it gains or loses 1 Joule of energy.

If you want to lift 5 coulombs to a height of 1 volt, you have to give it 5 joules.

If you actually give those 5 coulombs 7.5 joules instead, they'll rise up to 1.5 volts above the potential where they started. The flowed through a potential DIFFERENCE of 1.5 volts.

(If they started at a point that's connected to the Earth, like a water pipe or a metal flagpole, then their new potential is 1.5 volts, because we define zero as the potential of the ground.)
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Answer:

I=2.67\times 10^{-6}\ W/m

Explanation:

Given that,

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We need to find the the waves intensity 25 km from the antenna . The object emits intenisty evenly in all direction. It can be given by :

I=\dfrac{P}{4\pi r^2}\\\\I=\dfrac{21\times 10^3}{4\pi (25000)^2}\\\\I=2.67\times 10^{-6}\ W/m

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Which statement correctly describes the reactivity of noble gases, according to the octet rule? Their atoms have eight electrons
Kipish [7]

Answer:

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Explanation:

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