Physics-
General
Easy
Question
A sound wave of wavelength 32cm enters the tube as shown in the figure. Then the smallest radius ‘r’ so that a maximum of sound is heard at detector is
- 7 cm
- 14 cm
- 21 cm
- 28 cm
The correct answer is: 14 cm
Related Questions to study
physics-
Two stereo speakers are separated by a distance of 2.4 m. A person stands at a distance of 3.2 m as shown directly in front of one of the speakers. The frequencies in audible range for which the listener will hear a minimum sound intensity are (Speed of the sound in air is 320 ms-1 and n is order of minimum)
Two stereo speakers are separated by a distance of 2.4 m. A person stands at a distance of 3.2 m as shown directly in front of one of the speakers. The frequencies in audible range for which the listener will hear a minimum sound intensity are (Speed of the sound in air is 320 ms-1 and n is order of minimum)
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In the given arrangement, if hanging mass will be changed by 4%, then percentage change in the wave speed in string will be
In the given arrangement, if hanging mass will be changed by 4%, then percentage change in the wave speed in string will be
physics-General
physics-
The vibrating of four air columns are represented in the figure. The ratio of frequencies 
The vibrating of four air columns are represented in the figure. The ratio of frequencies
physics-General
physics-
A ‘pop’ gun consists a tube 25cm long closed at one end by a cork and the other end by a tightly fitted piston as shown. The piston is pushed slowly in. When the pressure rises to one and half times the atmospheric pressure, the cork is violently blow out. The frequency of the ‘pop’ caused by its ejection is (V = 340m/s)
A ‘pop’ gun consists a tube 25cm long closed at one end by a cork and the other end by a tightly fitted piston as shown. The piston is pushed slowly in. When the pressure rises to one and half times the atmospheric pressure, the cork is violently blow out. The frequency of the ‘pop’ caused by its ejection is (V = 340m/s)
physics-General
physics-
A source of sound is travelling at 
along a road, towards a point A. When the source is 3m away from A, a person standing at a point O on a road perpendicular to the track hears a sound of frequency ‘n ’. The distance of O from A at that time is 4m. If the original frequency is 640 Hz, then the value of n is (given velocity of 
A source of sound is travelling at along a road, towards a point A. When the source is 3m away from A, a person standing at a point O on a road perpendicular to the track hears a sound of frequency ‘n ’. The distance of O from A at that time is 4m. If the original frequency is 640 Hz, then the value of n is (given velocity of
physics-General
chemistry-
Faraday is equal to :
Faraday is equal to :
chemistry-General
chemistry-
0.1 ampere current is passed for 10 seconds through copper and silver voltameters. The metal that is deposited more is..
0.1 ampere current is passed for 10 seconds through copper and silver voltameters. The metal that is deposited more is..
chemistry-General
chemistry-
1 Faraday of electricity will liberate 1g atom of the metal from the solution of :
1 Faraday of electricity will liberate 1g atom of the metal from the solution of :
chemistry-General
chemistry-
During electrolysis process of fused CaH2, H2 is liberated at :
During electrolysis process of fused CaH2, H2 is liberated at :
chemistry-General
chemistry-
Assertion (A): Carbon exhibits catenation to maximum extent.
Reason (R): Valency of carbon is 4.
Assertion (A): Carbon exhibits catenation to maximum extent.
Reason (R): Valency of carbon is 4.
chemistry-General
chemistry-
Statement - A :Carbon has two unpaired electrons in its ground state.
Statement - B :Carbon forms 4 covalent bonds in all its compounds.
Statement - C :Carbon exists in ground state in all its compounds.
Statement - A :Carbon has two unpaired electrons in its ground state.
Statement - B :Carbon forms 4 covalent bonds in all its compounds.
Statement - C :Carbon exists in ground state in all its compounds.
chemistry-General
chemistry-
The end product ‘Z’ in the following reaction, 
is
The end product ‘Z’ in the following reaction, is
chemistry-General
chemistry-
Identify Z in 
Identify Z in
chemistry-General
chemistry-
Westrosol is
Westrosol is
chemistry-General
chemistry-
Consider the given figure showing that possible levels of the energy of 
ion depending on internuclear distance versus potential energy of the system .
It may be easily assumed that the ground state of the molecular hydrogen ion, corresponds to the lowest level which means that
Consider the given figure showing that possible levels of the energy of ion depending on internuclear distance versus potential energy of the system .
It may be easily assumed that the ground state of the molecular hydrogen ion, corresponds to the lowest level which means that
chemistry-General
