Answer:

Explanation:
Given that
For straight wire
Charge density= λ
For hollow metal cylinder
Charge density=2 λ
We know that electric filed for wire given as


Now the electric filed due to hollow metal cylinder


Now by considering the Gaussian surface r<R then only electric fild due to wire will present.So
At r<R

Answer:
Unit of weight is Newton(N)
Explanation:
Answer:
56
Explanation: I did the test
Using a basking spot so some sort of heated object, for example heating lamp or heating pad.