HSC Science कक्षा ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Define the term degrees of freedom.

An air column in a pipe which is closed at one end, will be in resonance with the vibrating body of frequency 83Hz. Then the length of the air column is ______.

Consider two uniform wires vibrating simultaneously in their fundamental notes. The tensions, densities, lengths and diameter of the two wires are in the ratio 8 : 1, 1 : 2, x : y and 4 : 1 respectively. If the note of the higher pitch has a frequency of 360 Hz and the number of beats produced per second is 10, then the value of x : y is

What is meant by end correction in resonance air column apparatus?

Describe the total degrees of freedom for monoatomic molecule, diatomic molecule and triatomic molecule.

How will you determine the velocity of sound using resonance air column apparatus?

Derive the ratio of two specific heat capacities of monoatomic, diatomic and triatomic molecules.

During an adiabatic process, the pressure of a mixture of monatomic and diatomic gases is found to be proportional to the cube of the temperature. Find the value of γ = `("C"_"P"/"C"_"V")`

A gas made of a mixture of 2 moles of oxygen and 4 moles of argon at temperature T. Calculate the energy of the gas in terms of RT. Neglect the vibrational modes.

Answer briefly.

What is Doppler effect?

If s_P and s_V denote the specific heats of nitrogen gas per unit mass at constant pressure and constant volume respectively, then

State the law of equipartition of energy.

Explain red shift and blue shift in Doppler Effect.

What is meant by the Doppler effect?

Discuss the following case:

Source in motion and Observer at rest

1. Source moves towards observer
2. Source moves away from the observer

Discuss the following case-

Observer in motion and Source at rest.

1. Observer moves towards Source
2. Observer resides away from the Source

Discuss the following case-

Both are in motion

1. Source and Observer approach each other
2. Source and Observer resides from each other
3. Source chases Observer
4. Observer chases Source

The speed of a wave in a certain medium is 900 m/s. If 3000 waves passes over a certain point of the medium in 2 minutes, then compute its wavelength?

Consider a mixture of 2 mol of helium and 4 mol of oxygen. Compute the speed of sound in this gas mixture at 300 K.

A ship in a sea sends SONAR waves straight down into the seawater from the bottom of the ship. The signal reflects from the deep bottom bedrock and returns to the ship after 3.5 s. After the ship moves to 100 km it sends another signal which returns back after 2 s. Calculate the depth of the sea in each case and also compute the difference in height between two cases.