are the following statements true or false 1)In a bimetallic strip of copper and

Question

are the following statements true or false

1)In a bimetallic strip of copper and metalin which curls when heated, the iron is on the inside of the curve.
2) When heat is added to a system, the temperature must rise .
3)When the pendulum of a grandfather clock is heated, the clock runs more slowly.
4)Cold objects do not radiate heat energy .

5)When the Celsius temperature doubles, the Fahrenheit temperature doubles.

6) copper plate has a hole cut in its center. When the plate is heated, the hole gets smaller.

Explanation / Answer

1)true (on heating length increases and hence time period and clock runs slowly)
2)false
3)true (metal expands on all sides, so hole will get smaller)
4)false (brass has higher coefficient of linear expansion so will expand more and be the outer edge of curve)
5)false (ex. melting of ice)
6)false (all objects above 0 K radiate heat)

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