HSC Science (Electronics) इयत्ता १२ वी - Maharashtra State Board Important Questions

Hence obtain the expression for acceleration, velocity and displacement of a particle performing linear S.H.M.

Calculate the internal energy at 298K for the formation of one mole of ammonia, if the enthalpy change at constant pressure is – 42.0 kJ mol^-1.

(Given: R = 8.314 J K^-1 mol^-1)

The length of the second’s pendulum in a clock is increased to 4 times its initial length. Calculate the number of oscillations completed by the new pendulum in one minute.

Obtan an expression for potential energy of a particle performing S.H.M. What is the value of potential energy at (i) Mean position, and (ii) Extreme position

From differential equation of linear S.H.M., obtain an expression for acceleration, velocity and displacement of a particle performing S.H.M.

A body of mass 1 kg is mafe to oscillate on a spring of force constant 16 N/m. Calculate (a) Angular frequency, (b) Frequency of vibrations.

During refrigeration cycle, heat is rejected by the refrigerant in the ______.

Answer in brief:

A gas contained in a cylinder surrounded by a thick layer of insulating material is quickly compressed has work been done?

Give an example of some familiar process in which no heat is added to or removed from a system, but the temperature of the system changes.

A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1 atm from a volume of 5 liters to a volume of 10 liters. In doing so it absorbs 400J of thermal energy from its surroundings. Determine the change in the internal energy of the system.

A system releases 130 kJ of heat while 109 kJ of work is done on the system. Calculate the change in internal energy.

An ideal monoatomic gas is adiabatically compressed so that its final temperature is twice its initial temperature. What is the ratio of the final pressure to its initial pressure?

Which of the following is correct, when the energy is transferred to a system from its environment?

Which of the following system freely allows the exchange of energy and matter with its environment? 

For work done to be reversible, the process should be ______ 

The second law of thermodynamics deals with the transfer of ______.

When two objects are said to be in thermal equilibrium?

What is the energy associated with the random, disordered motion of the molecules of a system called as?

A group of objects that can form a unit which may have the ability to exchange energy with its surrounding is called what? 

Draw a p-V diagram of the reversible process.