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Alecsey [184]
3 years ago
8

Electromagnetic waves with wavelength between about 1 cm and 20 cm are called??

Physics
1 answer:
kodGreya [7K]3 years ago
8 0
I believe the answer is Microwaves (just to clarify, not the oven). They're widely used for communications.<span />
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At the local playground, a 21-kg child sits on the right end of a horizontal teeter-totter, 1.8 m from the pivot point. On the l
Ksju [112]

Answer:

By convention a negative torque leads to clockwise rotation and a positive torque leads to counterclockwise rotation.

here weight of the child =21kgx9.8m/s2 = 205.8N

the torque exerted by the child Tc = - (1.8)(205.8) = -370.44N-m ,negative sign is inserted because this torque is clockwise and is therefore negative by convention.

torque exerted by adult Ta = 3(151) = 453N , counterclockwise torque.

net torque Tnet = -370.44+453 =82.56N , which is positive means counterclockwise rotation.

b) Ta = 2.5x151 = 377.5N-m

Tnet = -370.44+377.5 = 7.06N-m , positive ,counterclockwise rotation.

c)Ta = 2x151 = 302N-m

Tnet = -370.44+302 = -68.44N-m, negative,clockwise rotation.

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3 years ago
Fill in the correct answers. A big wheel with twice the circumference of a small wheel will rotate with ____ the force and ___ t
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C.

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""""""" Twice,Half """"""

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Is the SI unit of work newton?
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That should be the Grasslands ?
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