MEDIUM

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What is the smallest unit of sound in a language that can distinguish words?

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Important Questions on Equilibrium

HARD

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The

H^{+}

ion concentration of a solution is

2 \times 10^{- 8} mol L^{- 1}

. The pH value of the solution is

\log_{10} 2 = 0.3010

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Three sound waves of equal amplitudes have frequencies,

(n - 1), n, (n + 1)

. They superimpose to give beats. The number of beats produced per second will be

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The units nanometer and picometer are related as,

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

A tuning fork vibrates with frequency

256 Hz

and gives one beat per second with the third normal mode of vibration of an open pipe. What is the length of the pipe? (speed of sound in air is

340 m s^{- 1}

)

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The frequency of a tuning fork is

256 H z

. It will not resonate with a fork of frequency

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

A tuning fork of frequency

512 Hz

is vibrated with a sonometer wire, and

6

beats per second are heard. The beat frequency reduces if the tension in the string is slightly increased. The original frequency of vibration of the string is

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Two sound waves having wavelengths of

87 cm

and

88.5 cm

respectively, when superimposed, produce

10

beats per second. Find the velocity of the sound.

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Distinguish between stationary waves and beats.

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Explain briefly the analytical method of formation of beats.

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

A sound wave travels with a velocity of

300 m s^{- 1}

through a gas.

9

beats are produced in

3 s

when two waves pass through it simultaneously. If one of the waves has

2 m

wavelength, the wavelength of the other wave is

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

A

and

B

are two wires whose fundamental frequencies are

256 H z

and

382 H z

respectively. How many beats in two-second will be heard by the third harmonic of

A

and second harmonic of

B

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

When two waves of almost equal frequencies

n_{1}

and

n_{2}

reach at a point simultaneously, what is the time interval between successive maxima?

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Two tuning forks of frequency

250 Hz

and

256 Hz

produce beats. If a maximum is observed just now, after how much time the next maximum is observed at the same place?

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Describe Quincke's tube experiment to explain the phenomenon of beats.

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The length of a sonometer wire is either

95 cm

100 cm

. In both the cases, if a tuning fork produces

4 beats per second

, then the frequency of the tuning fork is

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Two tuning forks,

A

and

B

, produce notes of frequency

258 H z

and

262 Hz

. An unknown note when sounded with the fork A produces certain beats. When the same note is sounded with

B

, the beat frequency gets doubled. The unknown frequency is

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Two tuning forks have frequencies

380 Hz

and

384 Hz

, respectively. When they are sounded together, they produce

4

beats. After hearing the maximum sound, how long will it take to hear the minimum sound?

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

When two waves of almost equal frequencies

ν_{1}

and

ν_{2}

reach at a point simultaneously, the time interval between successive maxima is

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

A tuning fork of known frequency 256 Hz makes 5 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

What is the smallest unit of sound in a language that can distinguish words?

Important Questions on Equilibrium

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