# BRAINLYEST IF CORRECT! 2 QUESTIONS. HELP FAST PLEASE!! 5. A light bulb converts electrical energy into light energy and also some thermal energy. The amount of electrical energy is 50 Joules before the conversions. What is the total amount of energy after the conversion? A. 50 Joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion. B. 55 Joules because as more electricity comes in to the light bulb, the Joules increase. C. 100 Jo

1 answer

###### Question:

BRAINLYEST IF CORRECT! 2 QUESTIONS. HELP FAST PLEASE!!

5. A light bulb converts electrical energy into light energy and also some thermal energy. The amount of electrical energy is 50 Joules before the conversions.

What is the total amount of energy after the conversion?

A. 50 Joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion.

B. 55 Joules because as more electricity comes in to the light bulb, the Joules increase.

C. 100 Joules because you start with one form of energy and end up with two forms, so the amount of energy doubles.

D. 45 Joules because some energy is lost when it is put off as heat.

6. Water that flows from behind a large dam can cause machines to produce electricity. What change takes place?

A. Sound energy changes into electrical energy.

B. Mechanical energy is used to produce electrical energy.

C. Chemical energy is used to produce electrical energy.

D. Heat energy changes into mechanical energy.

5. A light bulb converts electrical energy into light energy and also some thermal energy. The amount of electrical energy is 50 Joules before the conversions.

What is the total amount of energy after the conversion?

A. 50 Joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion.

B. 55 Joules because as more electricity comes in to the light bulb, the Joules increase.

C. 100 Joules because you start with one form of energy and end up with two forms, so the amount of energy doubles.

D. 45 Joules because some energy is lost when it is put off as heat.

6. Water that flows from behind a large dam can cause machines to produce electricity. What change takes place?

A. Sound energy changes into electrical energy.

B. Mechanical energy is used to produce electrical energy.

C. Chemical energy is used to produce electrical energy.

D. Heat energy changes into mechanical energy.

## Answers

Q5. The answer is A. In thermodynamics, the first law of conservation states that energy can never be destroyed or created but can only be transformed from one form to another. Therefore part of the electric energy was converted to light energy while the other dissipated as heat. However, the summation of the energy of these tow outputs in joules remains the same as initial electric energy. Q6 The answer is B. This is because the water in the dam is used to turn turbines hence this form of energy is mechanical energy. As the turbines turn, they turn electromagnets that convert the mechanical energy into electrical energy

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