Answer:
Superconducting materials can transport electrons with no resistance, and hence release no heat, sound, or other energy forms. Superconductivity occurs at a specific material's critical temperature (Tc). As temperature decreases, a superconducting material's resistance gradually decreases until it reaches critical temperature. At this point resistance drops off, often to zero, as shown in the graph at right.
Explanation:
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Change in market price is m<span>ovement along the demand curve. </span>
Weight equals mass times gravitational acceleration=400N, so mass=400/9.8=41kg approx.
Because the core is a big ball of iron