If 500 watts hit the surface of a solar panel every second and it generates 150 watts every second, how efficient is it?

this could be newton#'s law of cooling. the cooling curve is exponential

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.