2 years ago

Which of the following is the correct definition of electric magnetic field

Physics

1 answer:

alekssr [168]2 years ago

5 0

Answer:

the electric magnitic is not a field to have an violen not elictric because a pandmic

sana maka toulong

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A turntable is designed to acquire an angular velocity of 32.4 rev/s in 0.5 s, starting from rest.

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Well, the acceleration is the difference of speeds divided by the time period. $\frac{32.4}{0.5}=64.8rev/s^2$ .
One rev/s is $2\pi rad/s^2$ , so our final result is $64.8*2\pi=407.15rad/s^2$ .

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A student who weighs 750 newton’s runs up the steps (which have a height of 8 meters) in 13.5 seconds. How much work did the stu

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Explanation:

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2 years ago

A child is riding in a child-restraint chair, securely fastened to the seat of a car. Assume the car has speed 47 km/h when it h

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Answer: F = 1235 N

Explanation: Newton's Second Law of Motion describes the effect of mass and net force upon acceleration: $F_{net}=m.a$

Acceleration is the change of velocity in a period of time: $a=\frac{\Delta v}{\Delta t}$

Velocity of the car is in km/h. Transforming it in m/s:

$v=\frac{47.10^{3}}{36.10^{2}}$

v = 13 m/s

At the moment the car decelerates, acceleration is

$a=\frac{13}{0.2}$

a = 65 m/s²

Then, force will be

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$F_{net}$ = 1235 N

The horizontal net force the straps of the restraint chair exerted on the child to hold her is 1235 newtons.

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