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1 year ago

6

A charge Q is transferred from an initially uncharged plastic ball to an identical ball 10.0 cm away. The force of attraction is

then 20.0 mN. Find magnitude of Q, give answer in C.

1 answer:

victus00 [196]1 year ago

5 0

Answer:

a charge Q is transferred from an initially uncharged

Explanation:

Hope this helps!

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Let us situate this on the x axis, and let our uniform line of charge be positioned on the interval <span>(−L,0]</span> for some large number L. The voltage V as a function of x on the interval <span>(0,∞)</span> is given by integrating the contributions from each bit of charge. Let the charge density be λ. Thus, for an infinitesimal length element <span>d<span>x′</span></span>, we have <span>λ=<span><span>dq</span><span>d<span>x′</span></span></span></span>.<span>V(x)=<span>1/<span>4π<span>ϵ0</span></span></span><span>∫line</span><span><span>dq/</span>r</span>=<span>λ/<span>4π<span>ϵ0</span></span></span><span>∫<span>−L</span>0</span><span><span>d<span>x/</span></span><span>x−<span>x′</span></span></span>=<span>λ/<span>4π<span>ϵ0</span></span></span><span>(ln|x+L|−ln|x|)</span></span>

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2 years ago

A train moving west with an initial velocity of 20 m/s accelerates at 4 m/s' for 10 secon

MArishka [77]

Answer:

Distance of 400m.

Explanation:

Use your kinematics equation to solve for distance (we can use kinematics b/c acceleration is constant).

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1 year ago

A skateboarder shoots off a ramp with a velocity of 7.1 m/s, directed at an angle of 61° above the horizontal. The end of the ra

dsp73

Answer:

Highest point reached = 3.37 m

Explanation:

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We have equation of motion, v² = u² + 2as

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Acceleration, a = -9.81 m/s²

Final velocity, v = 0 m/s

Substituting

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s = 1.97 m

So from ramp the position it goes up by 1.97 m

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2 years ago

A lamp is 10% efficient.How much electrical energy must be supplied to the lamp each second if it produces 20 J of light energy

k0ka [10]

If it produces 20J of light energy in a second, then that 20J is the 10% of the supply that becomes useful output.

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========================

Here's something to think about: What could you do to make the lamp more efficient ? Answer: Use it for a heater !

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3. If a voltage difference of 3.0 V causes a

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Answer:

it will be 1.8. voltage

that is wat I can't say

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2 years ago