You are exercising on a hot day. your body temperature goes upyou begin to sweat. this what cause your body to rise in your body temperature that signals to start sweating is an example of

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.