Sugars! Chemical energy, essential to life. And sugars such as glucose, and lipids such as fat are examples. now finish your biology homework the old fashioned way, otherwise you won't learn anything...
Lever
In physics, a lever (from French lever, "to raise", c.f. a levant) is a rigid object that is used with an appropriate fulcrum or pivot point to multiply the mechanical force that can be...
A Boolean is a variable that can be assigned one of two values.
True
or
False
It is called Boolean after George Bool who founded the use of Boolean logic in the field of computer science.