Question

A light bulb is supplied with 100 J of energy each
second.
a How many joules of energy leave the bulb
each second in the form of heat and light?
b If 10 J of energy leave the lamp each second
in the form of light, how many joules leave
each second in the form of heat?​

Answer 1

Answer:

a.95J

b.90J

Explanation:

a.Applying energy conservation laws:-

Energy  Into Bulb=$Light \ Energy+Thermal \ Energy(Heat \ Energy)$

Given  that light energy=5J,and Total Energy=100J

$Heat \ Energy= \Total \ Energy- Light \ Energy\\=100J-5J=95J$

b. Applying the laws in a above.

Total Energy=100J

Light Energy=10J

$Heat \ Energy=100J-10J=90J$

Answer 2

The amount of property that is needed by a body or an object to work is called energy. It is conserved and can only be transferred from one object to another. It is estimated in Joules, calories or kW -h.

The energy that leaves the lamp is a. 95 J and b. 90J.

This can be estimated as:

a. According to the conservational law of energy:

$\rm Energy \;in \;the\; bulb = Light \;Energy + Heat\; Energy$

Given,

• Light Energy = 5 J

• Total Energy = 100 J

Substituting values in the equation:

$\begin{aligned}\text{ Heat Energy} &= \text{Total Energy - Light Energy} \\&= 100 - 5 \\&= 95 \text{J} \end{aligned}$

b. Applying the same law:

Given,

• Total energy = 100 J

• Light energy = 10 J

Substituting values:

$\begin{aligned} \text{Heat Energy } & = 100 - 10 \\& = 90 \text{J} \end {aligned}$

Therefore, energies released are a. 95 J and b. 90J.

To learn more about energy follow the link:

https://brainly.com/question/11897169