Basics of Thermodynamics

What is the accumulation in the system after $4\sec$ if the out flow and in flow rates are $3 \mathrm{g} {\mathrm{s}}^{-1}$ and $8 \mathrm{g} {\mathrm{s}}^{-1}$?

What is the accumulation in the system after $10 \mathrm{s}$ if the out flow and in flow rates are $10 \mathrm{g} {\mathrm{s}}^{-1}$ and $15 \mathrm{g} {\mathrm{s}}^{-1}$?

A country is an example of which of the following?

A pressure cooker is an example of which of the followings?

Desert cooler is an example of which of the following?

Which of the following is/are macroscopic variables:

 Which of the following is constant in a diathermic boundary?
 

What is diathermic boundary?

A diathermic boundary is a boundary that allows_____to transfer. 

 Which of the following is constant in a diathermic boundary?
 

A diathermic boundary is a boundary that allows heat to transfer.

Macroscopic variable is a measurable quantity used to describe the complete _____ of the system. 

What are microscopic variables?

The variables like pressure, volume, temperature of a thermodynamic system are microscopic.

Which of the following is/are macroscopic variables:

Define adiabatic boundary?

All such boundaries of thermodynamic system that are impermeable to the flow of heat across itself are called _____.

Which one of the following is correct about an adiabatic boundary?

Adiabatic refers to a process in which no heat is transferred into or out of a system.

Which of these is an example of the intensive quantity in thermodynamics?