Option B, because the metal thermally expands and contracts to complete an electrical circuit
Explanation:
A thermostat has two bimetallic strips which is made up of two different metals in which one metal expand more than the other. This bimetallic strip acts as a bridge between an electrical and a heating system.
This bimetallic strip carries the electricity (as it connects the two system) and gets heated. Heating causes the strip to expand and thus with expansion the strip starts bending up to a point where it breaks open the circuit and thus the electricity is turned off.
As the circuit breaks down the bimetallic strip starts cooling and then it regains its original shape.
"Its habitat can vary somewhat if it is
<span> supplied with eucalyptus</span>" is a true statement regarding the Australian Koala. This is how these animals are able to live in zoos outside Australia.
Sulfur has 16 electrons in its atoms. Over how many energy levels are the electrons distributed, and how many are in each energy level? The electrons in a sulfur atom are distributed over the three energy levels; there are two electrons in the first energy level, eight in the 2nd, and six in the third.
