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3 years ago

Lighting a match changes chemical energy into heat and light. The total amount of energy _____.

2 answers:

8 0

Hello.

The answer is remains the same.

The total amount of energy stays the same because the 1st Law of Thermodynamics states that energy can neither be created nor destroyed, it can only change forms. So the chemical energy is just being converted into heat and light.

Have a nice day

hichkok12 [17]3 years ago

4 0

Answer:

remains the same

Explanation:

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3 years ago

A circuit is set up such that it has a current of 8 A. What would be the new current if the resistance was increased by a factor

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Answer:

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Explanation:

The relationship between current, voltage and resistance in a circuit is given by Ohm's law:

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The equation can also be rewritten as

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from which we see that the current is inversely proportional to the resistance, R.

In this problem, the initial current is I = 8 A. Then the resistance is doubled:

R ' = 2R

So the new current is

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so the current is halved.

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