This at be due to a chemical change. For example, when some chemical elements mix, the change causes heat. This is the same, but the opposite. Hope this helps!
The buoyant force is the upward force or thrust...Simply, consider immersing your hand into a bucket of water. What happens to it? It raises (a little). The raising is due to the buoyant force. Basically it is the upward force/thrust that acts on any object immersed into a fluid. Hence why things float when out in water. Hope this helped!!
The 4 types of air masses are polar, tropical, continental and maritime. Their classification depends on their location where they are formed.
The term Rutherford gave to the positively charged particles in the nucleus of an atom was/is Proton.
Hope this helps!
Carbohydrates are ring shaped.
