An is a solid bar that rotates or turns around a fixed point called a fulcrum

A lever is a simple machine consisting of a bar that rotates around a fixed point.

Explanation:

Unlike most machines a lever allows work by adjusting the force applied to the machine or the distance the force is applied over.

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the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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