The ratio of students who walk home from school to the students who ride the bus is 2:7
2 answers:
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Answer:
<h2>Outer Electric Field is 11250 N/C.</h2><h2>Inner Electric Field is -10000 N/C.</h2>Step-by-step explanation:
First of all, we need to read carefully and analyse the problem. As you can see, is an electrical subject, and it's given surface charge densities and radius.
So, to calculate electric fields, we need to find the proper equation to do so: ; as you can see, first we need to find the charges.
We can find all charges using the surface charge densities, because it has the next relation: ; which indicates that charge density is the amount of charge per area. But, there's a problem, we don't have areas, so we have to calculate them first with this relation:
; which gives us the surface of a sphere.
The inner surface:
The outer surface:
Now we can calculate the charges,
Inner charge:
Outer charge:
Then, we are able to calculate both fields:
Inner field:
Outer field:
The directions that field have is opposite each other, the inner one has an inside direction, and the outer electric field has an outside direction.
Answer:
Therefore 80 ceperies will he need to sell this month.
Step-by-step explanation:
Average: Average is the ratio of sum of all numbers to the total number present in the data.
Given that Herbert has sold 99, 37, 86 and 73 copeirs in the last 4 months.
Let he need to sell x copeirs in this month.
According to the problem,
⇒ 99+37+86+73+x= 75×5
⇒295 + x= 375
⇒x = 375 - 295
⇒ x= 80
Therefore 80 ceperies will he need to sell this month.