Choose true or false for all statements

1. when the celsius temperature doubles, the fahrenheit temperature doubles.
2. when heat is added to a system, the temperature must rise.
3. in a bimetallic strip of aluminum and brass which curls when heated, the aluminum is on the inside of the curve.
4. an iron plate has a hole cut in its center. when the plate is heated, the hole gets smaller.
5.when the pendulum of a grandfather clock is heated, the clock runs more slowly.
6.cold objects do not radiate heat energy.

Explanation:

1 . When the Celsius temperature doubles, the Fahrenheit temperature doubles  - FALSE

A change of temperature from 300 F to 600 F changes celsius degree from 148 to 315 °C

2. When heat is added to a system, the temperature must rise.

- FALSE

When we add heat to a system of mixture of ice and water , temperature does not rise until whole of ice melts.

3. In a bimetallic strip of aluminum and brass which curls when heated, the aluminum is on the inside of the curve

- FALSE

Coefficient of linear thermal expansion of aluminium is more so it will be on the outer side.

4. An iron plate has a hole cut in its center. When the plate is heated, the hole gets smaller.

- FALSE

hole will be bigger. There will be photogenic expansion .

5.When the pendulum of a grandfather clock is heated, the clock runs more slowly.

TRUE

Time period is directly proportional to square root of length of pendulum.

when time period increases , clock becomes slow.

6.Cold objects do not radiate heat energy

- FALSE

Object radiates energy  at all temperature .

6 .

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

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