The answer to question one is A.
The answer to question two is A.
The answer to question three is D.
Among the choices, the correct answer is D. "A bimetallic strip bends so that the steel is on the outside curve."
A bi-metallic strip is composed of 2 metals with different thermal coefficients. One side (usually brass) expands much faster than the other side (usually iron or steel). When brass is on the outside curve, then it means that the temperature has risen. If steel is on the outside curve, then it means that the temperature has dropped.
Answer:
because you rubbed the ballon the charge went faster
Explanation:
<h2>
Magnitude of force doubles.</h2>
Explanation:
Force between two charges is given by
where q₁ and q₂ are charges and r is the distance between them.
Here one charge is doubled with keeping all others same.
q₁ = 2 q₁
We have
Magnitude of force doubles.