verb. If someone lightens a situation, they make it less serious or less boring. What does a brighter note mean? If the topic being discussed was sad. You would change the subject to something happy by saying “On a brighter note” This is an idiom. Bright in this case meansRead More →

Carbon monoxide has a molecular weight which is slightly lighter than air; but despite that fact, it doesn’t just rise to the ceiling. The difference in density between air and CO is minimal and because of this difference, it causes the gas to have a neutral effect in any room.Read More →