Answer:
Explanation:
Part a)
For a position of point inside the inner shell we can use Gauss law as

now here we know that enclosed charge in the inner shell is ZERO
so we have


Now for the position between two shells

again by Gauss law

now here we know that enclosed charge between two shells is given as

so we have


Now for position outside the shell we will have

again by Gauss law

now here we know that enclosed charge given as

so we have


Part b)
If outside the shell net electric field is zero
then we can say



Part c)
Answer:
He sowed the seeds
Explanation:
While the question should have given the person who did the sowing for example the seeds were sown by him/ her/ the farmer/ or any name. Therefore, voice is given in passive and to change passive voice to active voice then the sentence will read as follows assuming that the seeds were sown by him
He sowed the seeds
Answer:
Speed = 10 km/hr
Explanation:
Speed = Distance / Time
Since we have to convert it into minutes to hours ( because it is km/hr )
45 minutes = 0.75 hours
Therefore,
Speed = 7.5 / 0.75
= <u>10 km/hr </u>
<u></u>
<u>Hope it helps!</u>