Why are houses in hot areas painted in white while those in cold areas painted with dull colours

Colors absorb heat because of how they absorb light. Black will absorb more light from the sun, which means absorbing more heat, while white reflects more light, meaning it absorbs less energy and heat from the sun.

Explanation:

Hope it helps! ^_^

Because white color reflects back the heat coming from the sun while dull colors absorb the heat.

do you have a formula possibly

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west