Podcast
Questions and Answers
What is the surface tension of the soap solution?
What is the surface tension of the soap solution?
- 2.5 x 10^-2 J
- 6.28 x 10^-3 N/m (correct)
- 62.84 x 10^-2 N/m
- 25 x 10^-2 J
Why is a black body considered a perfect emitter and absorber of radiation?
Why is a black body considered a perfect emitter and absorber of radiation?
- Because it reflects all radiation
- It absorbs all incident radiation and emits the maximum possible amount (correct)
- It has high heat conductivity
- Due to its color
Which law states that the emissive power of a black body is proportional to the fourth power of its absolute temperature?
Which law states that the emissive power of a black body is proportional to the fourth power of its absolute temperature?
- Kirchhoff's law of radiation
- Boltzmann's law
- Wein's displacement law
- Stefan-Boltzmann law (correct)
How does the root mean square (R.M.S) velocity of gas molecules relate to the absolute temperature of the gas?
How does the root mean square (R.M.S) velocity of gas molecules relate to the absolute temperature of the gas?
What does Boyle's Law state regarding the volume and pressure of a gas?
What does Boyle's Law state regarding the volume and pressure of a gas?
What property makes a perfectly black body unique compared to other bodies in terms of radiation?
What property makes a perfectly black body unique compared to other bodies in terms of radiation?
Which law of thermodynamics states that the total internal energy of a system remains constant in a thermodynamic process?
Which law of thermodynamics states that the total internal energy of a system remains constant in a thermodynamic process?
What is the term for a process in which there is no change in temperature?
What is the term for a process in which there is no change in temperature?
Which type of equilibrium refers to the state where two objects are at the same temperature?
Which type of equilibrium refers to the state where two objects are at the same temperature?
What is the term for a process that occurs without the exchange of heat with the surroundings?
What is the term for a process that occurs without the exchange of heat with the surroundings?
Which law of thermodynamics states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other?
Which law of thermodynamics states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other?
What is the term for a process where there is no change in volume?
What is the term for a process where there is no change in volume?
If a body cools from 80°C to 70°C in 5 minutes and then to 62°C in the next 5 minutes, what is the rate of cooling of the body?
If a body cools from 80°C to 70°C in 5 minutes and then to 62°C in the next 5 minutes, what is the rate of cooling of the body?
When a body cools at the rate of 0.5°C/min at 25°C above the surroundings, what is the rate of cooling when it is 15°C above the same surroundings?
When a body cools at the rate of 0.5°C/min at 25°C above the surroundings, what is the rate of cooling when it is 15°C above the same surroundings?
At what temperature will the average kinetic energy of a gas be exactly half of its value at N.T.P.?
At what temperature will the average kinetic energy of a gas be exactly half of its value at N.T.P.?
If a black body loses heat at 627°C and another at 327°C, what is the ratio of their heat loss rates?
If a black body loses heat at 627°C and another at 327°C, what is the ratio of their heat loss rates?
If the difference between two molar specific heats of a gas is 6000 J/kg.K and the ratio of specific heats is 1.4, what is the molar specific heat at constant volume?
If the difference between two molar specific heats of a gas is 6000 J/kg.K and the ratio of specific heats is 1.4, what is the molar specific heat at constant volume?
Given that the difference between two molar specific heats of a gas is 9000 J/kg K and the ratio of specific heats is 1.5, what are the two molar specific heats?
Given that the difference between two molar specific heats of a gas is 9000 J/kg K and the ratio of specific heats is 1.5, what are the two molar specific heats?
