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Vedmedyk [2.9K]
3 years ago
5

Charge Q = +4.00 mC is distributed uniformly over the volume of an insulating sphere that has radius R = 5.00 cm. What is the po

tential difference between the center of the sphere and the surface of the sphere?
Physics
1 answer:
sattari [20]3 years ago
8 0

Answer:

3.6 x 10^8 V

Explanation:

Q = 4 m C = 4 x 10^-3 C

r = 5 cm = 0.05 m

The formula for the potential at the surface is

Vs = K Q / r = (9 x 10^9 x 4 x 10^-3) / 0.05 = 7.2 x 10^8 V

The formula for the potential at the centre is

Vc = 3/2 Vs

Vc = 1.5 x 7.2 x 10^8 V = 10.8 x 10^8 V

The difference in potential is

V = Vc - Vs = 10.8 x 10^8 - 7.2 x 10^8 = 3.6 x 10^8 V

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if you're shopping for a rack switch, what component on the switch tells you it can be mounted to a rack?
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if you're shopping for a rack switch, the component on the switch that tells you it can be mounted to a rack is the:

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<h3>What are rack ears?</h3>

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2 years ago
According to Wien's Law, how many times hotter is an object whose blackbody emission spectrum peaks in the blue, at a wave lengt
scZoUnD [109]

Answer:1.55 times

Explanation:

Given

First wavelength(\lambda _1)=450 nm

Second wavelength(\lambda _2)=700 nm

According wien's diplacement law

\lambda T=constant

where \lambda =wavelength

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Let T_1 and T_2 be the temperatures corresponding to \lambda _1 & \lambda _2 respectively.

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\frac{T_1}{T_2}=\frac{\lambda _2}{\lambda _1}

\frac{T_1}{T_2}=\frac{700}{450}=1.55

Thus object with \lambda 450 nm is 1.55 times hotter than object with wavelength \lambda =700 nm

8 0
3 years ago
An airplane has a starting velocity of 300m/s. It then accelerates at a rate of 45m/s2 for a time of 10s. What is it's final vel
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A = (v - u) / t

a = acceleration
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45 = (v - 300) / 10

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Hope this helps!

P.S. Let me know if you need an explanation
8 0
3 years ago
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