A lizard of mass 3.0 g is warming itself in the bright sunlight. It casts a shadow of 1.6 cm 2 on a piece of paper held perpendicularly to the Sun's rays. The intensity of sunlight at the Earth is 1.4 × 103 W/m2, but only half of this energy penetrates the atmosphere and is absorbed by the lizard.
(a) If the lizard has a specific heat of 4.2 J/(g·°C), what is the rate of increase of the lizard's temperature?
(b) Assuming that there is no heat loss by the lizard (to simplify), how long must the lizard lie in the Sun in order to raise its temperature by 5.0°C?