Heat and Thermodynamics - SS2 Physics Past Questions and Answers - page 3

Which of the following materials typically expands the most when heated?

When an object undergoes thermal expansion, what happens to its density?

Which of the following statements is true regarding the coefficient of linear expansion (α) of a material?

Which of the following objects would experience the greatest expansion when heated by the same amount?

A steel rod has an original length of 2 metres. If its coefficient of linear expansion is 12 × 10-6 /°C and it is heated by 100°C, what will be its new length?

A copper pipe with an original length of 5 metres is heated from 20°C to 80°C. If the coefficient of linear expansion for copper is 16 × 10^-6 /°C, what is the change in length of the pipe?

A glass container has an original volume of 500 cm^3 at 25°C. If the coefficient of volume expansion for glass is 9 × 10^-6 /°C and it is heated to 75°C, what will be its new volume?

A brass ring with an original diameter of 8 cm is heated from 20°C to 100°C. If the coefficient of linear expansion for brass is 19 × 10^-6 /°C, what will be its new diameter?

According to the first law of thermodynamics, the change in internal energy of a system is equal to:

The second law of thermodynamics states that: