Physics, 22.06.2021 19:40 ayoismeisjjjjuan

a string 2m long used to whirl a 200gm stone in horizontal circle at a speed of 2m/s . find the tension in the string

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Answer from: jessicadempsey

Explanation:

First off, we need the mass in kg and it's in g so we have to convert it. Then we can do the problem. 200 g = .200 kg. Moving on.

The equation used to find the tension in the string is the same one we use to find the centripetal force, because the tension is what is upplying the centripetal force needed to keep the stone moving in a circular manner. The formula for that is

$F_c=T=\frac{mv^2}{r}$ where ma is the mass in kg, v is the velocity in m/s, and r is the radius of the circle about which the stone spins in meters.

Filling in:

$T=\frac{(.200)(2)^2}{2}$ which gives us

T = .4 N

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Answer from: Quest

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

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calculate the length of the solenoid (l2) in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

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a string 2m long used to whirl a 200gm stone in horizontal circle at a speed of 2m/s . find the tens...

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