Two Problems down here about Physics?

Question

PROBLEM #1:
What determines wheter an object at a given time is net absorber or net emitter?

PROBLEM #2:
Why is important that your finger be wet if you intend to touch it briefly to a hot clothes iron to test its temperature?

Please indicate which answer is for what question while answering.

Answer 1

Problem #1 - Since yr second question involves thermodynamics, I'm assuming the first one does also. In which case a net emitter (of heat) will have a higher temperature than the ambient material. Heat flows from higher to lower temperatures. An absorber is simply the reverse. Over time, the temperatures reach equalibrium and heat flow stops.

Problem #1 - When you touch the iron the moisture on your finger is converted to steam which momentarily insulates your finger from the hot iron surface and prevents you from being burned.