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yaroslaw [1]
3 years ago
12

What is the electric potential of a 2.2 µC charge at a distance of 6.3 m from the charge? Recall that Coulomb’s constant is k =

8.99 × 109 N • ___ V What is the electric potential at a distance of 99 m from the charge?___ V
Physics
2 answers:
Doss [256]3 years ago
6 0
The first part of the question is 3,100 V.

The second part of the question is 200 V.
const2013 [10]3 years ago
3 0

Electric potential due to a point charge is given by

V = \frac{kQ}{r}

here we know that

Q = charge

r = distance from the charge

V = \frac{9*10^9* 2.2* 10^{-6}}{6.3}

V = 3142.8 Volts

now again by the same equation

V = \frac{kQ}{r}

V = \frac{9*10^9* 2.2* 10^{-6}}{99}

V = 200 Volts


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The small piston of a hydraulic lift has a cross-sectional of 3 00 cm2 and its large piston has a cross-sectional area of 200 cm
Nesterboy [21]

Q: The small piston of a hydraulic lift has a cross-sectional of 3.00 cm2 and its large piston has a cross-sectional area of 200 cm2. What downward force of magnitude must be applied to the small piston for the lift to raise a load whose weight is Fg = 15.0 kN?

Answer:

225 N

Explanation:

From Pascal's principle,

F/A = f/a ...................... Equation 1

Where F = Force exerted on the larger piston, f = force applied to the smaller piston, A = cross sectional area of the larger piston, a = cross sectional area of the smaller piston.

Making f the subject of the equation,

f = F(a)/A ..................... Equation 2

Given: F = 15.0 kN = 15000 N, A = 200 cm², a = 3.00 cm².

Substituting into equation 2

f = 15000(3/200)

f = 225 N.

Hence the downward force that must be applied to small piston = 225 N

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enot [183]

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A - Crest,  B - amplitude,  C - wavelength,  D - trough

Explanation:

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Suppose a current flows through a copper wire. Which two things occur?
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Answer:

a

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