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Sophie [7]
2 years ago
14

Two equipotential surfaces surround a +3.10 x 10-8-c point charge. how far is the 290-v surface from the 41.0-v surface?

Physics
1 answer:
MrMuchimi2 years ago
8 0
 T<span>he equation to be used here to determine the distance between two equipotential points is:
V = k * Q / r 

where v is the voltage of the point, k is a constant, Q is charge of the point measured in coloumbs and r is the distance. 
In this case, we can use ratio of proportions to determine the distance between the two points. in this respect, 

Point 1: 
V = k * Q / r = 290
r = k*Q/290 ; kQ = 290r

Point 2:
V = k * Q / R = 41
R = k*Q/41
from equation 10 kQ = 290r
R = 290/(41)= 7.07 m 
The distance between the two points then is equal to 7.07 m.


</span>
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It takes the train 7.5 seconds to reach top speed

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To find the time we can use this rule;

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<em>It takes the train 7.5 seconds to reach top speed</em>

<em></em>

Now we need to find how far the train travels before reaches top speed

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