Answer:
Mineral Wool
Explanation:
The mineral wool is a porous material that restricts thermal energy by trapping air in.
Answer:
the answer is B: earth takes to rotate once on its axis
According to Hooke's Law formula. The force is proportional to the displacement of the spring. I believe
Answer:

Explanation:
Given that,
The instantaneous current in the circuit is giveen by :

We need to find the rms value of the current.
The general equation of current is given by :

It means, 
We know that,

So, the rms value of current is 2.12 A.