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Akid pulls on a rope with 20 newtons of force. the block and tackle system pulls up a 160 newton box. what is the mechanical advantage of the pulley system
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Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.
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Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f
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Akid pulls on a rope with 20 newtons of force. the block and tackle system pulls up a 160 newton box...
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