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DochEvi [55]
3 years ago
5

Which statement best explains the relationship between the electric force between two charged objects and the distance between t

hem
a) As the distance increases by a factor, the electric force increases by the square of that factor.
b) As the distance increases by a factor, the electric force increases by twice that factor.
c) As the distance increases by a factor, the electric force decreases by twice that factor.
d) As the distance increases by a factor, the electric force decreases by the same factor.
e) As the distance increases by a factor, the electric force decreases by the square of that factor.
Physics
1 answer:
Alex3 years ago
6 0
'e' is the accurate description.
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Professor Stefanovic is spinning a bucket of water by extending his arm and rotating his shoulder in class to show the effects o
anyanavicka [17]

Answer:

a ) 2.368 rad/s

b) 3.617 rad/s

Explanation:

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F_{inward } = F_G + F_T   ------ equation (1)

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Also

F_G = m*g

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Now; we can rewrite our equation as :

mr \omega^2= mg + 0\\\omega^2 = \frac{m*g}{m*r}\\\omega^2 = \frac{g}{r}\\\omega = \sqrt{\frac{g}{r} \ \  }     ------ equation \ \ \ {2}

So; Given that:

The rope that is attached to the bucket is lm long  and his arm is 75 cm long.

we have our radius r = 1 m +  75 cm

= ( 1 + 0.75 ) m

= 1.75 m

g = acceleration due to gravity = 9.81 m/s²

Replacing our values into equation (2) ; we have:

\omega = \sqrt{ \frac{9.81}{1.75}}\\\omega = 2.368 \  rad/s

b) if he detaches the rope and spins the bucket by holding it with his hand ; then the radius = 0.75 m

∴

\omega = \sqrt{ \frac{9.81}{0.75}}\\\omega = 3.617 \  rad/s

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4 years ago
Determine the 3 standing waves for a 4 m length of rope.
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Harmonics, Loop and Harmonic number

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