Question

A traditional light bulb gives out heat and light. It makes 5, J,5J of light for every 60, J,60J of electricity it uses. How much heat does it make?

Answer 1

Answer:

Heat produced = 55 J

Step-by-step explanation:

If a traditional light bulb makes 5 J of light for every 60 J of electricity it uses, then the remaining energy is lost as heat.

To find out how much heat it makes, we can first calculate the proportion of energy that is lost as heat:

Proportion of energy lost as heat = 1 - (energy used for light / total energy used)
Proportion of energy lost as heat = 1 - (5 J / 60 J)
Proportion of energy lost as heat = 1 - 0.0833
Proportion of energy lost as heat = 0.9167

This means that 91.67% of the energy is lost as heat. To find out how much heat this is in joules, we can multiply the total energy used by the proportion of energy lost as heat:

Heat produced = total energy used x proportion of energy lost as heat
Heat produced = 60 J x 0.9167
Heat produced = 55 J

Therefore, the traditional light bulb produces 55 J of heat for every 60 J of electricity it uses.

Answer 2

How do you calculate how much useful energy is transferred?

Energy transferred electrically is calculated using the equation ΔE = IVt , where I is the current, V is the potential difference and t is time.

Step-by-step explanation: