Calculus was developed by Isaac Newton.
B- Newton
C a priest hope this helpssssssss
A wooden marionette is a figure that is normally used for theatrics. It is controlled by a person who holds it from the upper part with a series of nylon strings which are attached to each of the marionette's extremities.
A Wooden diving board is normally found on the edge of swimming pools. It is used by amateur and professional divers in order to execute dives into the pool.
Both of them function by the principle of equilibrium. In the case of the marionette, the person who is operating it moves its fingers up and down in order to create movement. In the case of the diving board, the metal bolts which hold the board's structure cause an opposing force that ultimately serves as a counterbalance when the diver jumps into the other end of the board.
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Serf’s is important in Medieval Europe because they worked the land to grow many crops for their lord and also for themselves.
