a cubical box 20-cm on a side is contructed from 1.2 cm thick concrete panels. A 100-W light bulb is sealed inside the box. What is the temperature on teh inside ofthe box when the light is on and the outside temperature is 20C

Temperature on the inside ofthe box

Explanation:

The power of the light bulb is the rate of heat conduction of the bulb,

The thickness of the wall, L = 1.2 cm = 0.012m

Length of the cube's side, x = 20cm = 0.2 m

The area of the cubical box, A = 6x²

A = 6 * 0.2² = 6 * 0.04

A = 0.24 m²

Temperature of the surrounding,

Temperature of the inside of the box,

Coefficient of thermal conductivity, k = 0.8 W/m-K

The formula for the rate of heat conduction is given by:

this is true

explanation:

i looked it up