Explanation:
Simple machines make our work easier. There are many types of simple machines.
(1) Seesaw is an example of a first-class lever. In the first class lever, the fulcrum is present in the middle of the lever.
(2) Pencil sharper: It is a compound machine. It consists of wheel and axle and wedge also.
(3) Bottle opener: It is a type of 2nd class lever. In this, the fulcrum is present at one end.
(4) Forearm: It is an example of a third-class lever. Fulcrum is present at one end in the third class lever.
(5) Nail: It is an example of the wedge as all knives or nails are wedges.
(c) One corollary of the second law of thermodynamics states that the change in entropy<span> of </span>a closed system<span> must be greater than zero or equal to zero. (d) </span>A closed system can experience an increase in entropy only when<span> irreversibilities are present within the </span>system<span> during the process.</span>
Cell walls are unique to plant cells
It was amid the Middle Ages. It is the time of European history between established vestige and the Renaissance, starting with the destruction of Rome, around AD 476, and enduring until around 1450. Excellence culture is prove by woven artworks, models, and different antiques from this period. The greater part of the proposals indicate transcending hoods, unpredictable hairdos, and the utilization of beautifying agents on skin and hair. Ladies wore hued cosmetics on their cheeks and lips, yet not on their eyes. Around AD 1000, a Persian doctor and chemist named Avicenna refined the procedure of steam refining. This introduced the present day period of steam-refined basic oils that we utilize today.