QUESTION 1 Which one of the following statements correctly describes emissivity e in the StefanBoltzmann law of radiation? {23- The emissivity depends on the surface area of the object. {:3- The emissivity is zero for a perfect blackbody. {23- The emissivity is a dimensionless quantity. {:3- The emissivity is negative in the infrared region. QUESTION 2 Which one of the following statements regarding kinetic theory is correct? {:3- The rms speed ofthe gas particles is inversely proportional to the temperature. {:3- The kinetic energy ofthe gas particles is proportional to the Kelvin temperature of the system. {:3- The internal energy of the gas is independent of its Kelvin temperature. {:3- The square of the rms speed ofthe gas particles is proportional to the mass. QUESTION 3 Which one of the following statements is false when considering one mole of an ideal gas? {23- When the temperature of the gas is constant, the pressure is inverser proportional to the volume. {:3- When the pressure of the gas is constant, the temperature is proportional to the volume. {23- When the volume of the gas is constant, the pressure is inversely proportional to the temperature. {:3- When the volume of the gas is constant, the pressure is proportional to the temperature. QUESTION 4 Which one of the following statements incorrectly describes thermal conductivity? {:3- In general, metals have large thermal conductivities. {:3- The SI unit of thermal conductivity is J WK. {3- In general, fluids have small thermal conductivities. {:3- The unit ofthermal conductivity is W?(rnC). QUESTION 5 When calculating the internal energy U of the monatomic ideal gas, we use U = 3/2 nRT. Here, n is the number of moles, R is the universal constant, and T is the Kelvin temperature. What is U when considering 2 moles of gas? O RT O 1.5 RT O 2 RT O 3 RT QUESTION 6 Select the correct order from greatest to least in the thermal conductivityes of some materials. O Diamond-Silver-Brass-Steel-Ice-Air Concrete-Diamond-Ice-Silver-Wood O Diamond-Ice-Wood-Air-Silver O Silver-Brass-Ice-Diamond-Air QUESTION 7 Which one of the following statements is false regarding Boyle's law for a fixed number of moles of an ideal gas? O The product between the pressure and the volume is constant. O The volume is inversely proportional to the pressure. O The pressure is proportional to the volume. O When the temperature is constant, the ideal gas law reduces to Boyle's law. QUESTION 8 Which one of the following statements is false when heat is transferred via convection? O Convection occurs in the motion of a liquid or a gas. O Convection occurs in the bulk motion of a fluid. O Convection does not occur within metallic materials. O Convection is the process in which heat is transferred through a material. QUESTION 9 When considering a constant pressure with a constant number of moles of an ideal gas in the ideal gas law, the volume is proportional to the Kelvin temperature. What is this law? O Hooke's law O Boyle's law O Charles' law O Boltzman's lawQUESTION 10 Which one of the following mathematical equations correctly expresses the ideal gas law? Here, P is the absolute pressure, V is the volume, T is the Kelvin temperature, R is the universal gas constant, k is the Boltzmann constant, N is the total number of particles, and n is the number of moles. O PV = NKT O PR = nkT O PT = KR O PT = nkV