What does the symbol 'a' (alpha) represent in the linear thermal expansion equation? A. It represents the length of expansion due to a temperature change AT. B. It represents the coefficient of linear expansion, and it depends on the type of material. C. It represents the temperature change along the length of the material. D. It is a universal constant, which has the same value for all materials. E. It is a variable that depends on size, mass, and temperature of material.

7. The average kinetic energy of the molecules in an ideal gas increase with the volume remaining constant. Which of these statements must be true? a. both the pressure and the temperature increase b. the number density decreases c. the temperature increases, and the pressure stays the same. d. the pressure increases, and the temperature stays the same

The heat conducted through a bar depends on which of the following? A. The coefficient of linear expansionB. The thermal conductivityC. The specific heat capacityD. The length of the barE. The cross-sectional area of the bar     A, C, and D   A, B, and D   B, C, D, and E   B, D, and E   C, D, and E

Which of the following equations can be used for calculating the amount of heat required to change the temperature of a material of mass m by AT. The material has specific heat capacity of cand latent heat of L. A. Q = mL B. Q = mc AT C. Q = mc AT + ml D. Q = m AT