Physics-
General
Easy
Question
In the experiment for the determination of the speed of sound in air using the resonance column method, the length of the air column that resonates in the fundamental mode, with a tuning fork is 0.1 m. When this length is changed to 0.35 m, the same tuning fork resonates with the first overtone. Calculate the end correction :
- 0.012 m
- 0.025 m
- 0.05 m
- 0.024 m
The correct answer is: 0.025 m
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Physics-
A detector is released from rest over a source of sound of frequency ƒ0 = 103 Hz. The frequency observed by the detector at time t is plotted in the graph. The speed of sound in air is : (g = 10 m/s2)
A detector is released from rest over a source of sound of frequency ƒ0 = 103 Hz. The frequency observed by the detector at time t is plotted in the graph. The speed of sound in air is : (g = 10 m/s2)
Physics-General
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S1 and S2 are two coherent sources of sound of frequency 110 Hz each. They have no initial phase difference. The intensity at a point P due to S1 is I0 and due to S2 is 4I 0. If the velocity of sound is 330 m/s then the resultant intensity at P is
S1 and S2 are two coherent sources of sound of frequency 110 Hz each. They have no initial phase difference. The intensity at a point P due to S1 is I0 and due to S2 is 4I 0. If the velocity of sound is 330 m/s then the resultant intensity at P is
Physics-General
Physics-
Figure shown is a graph, at a certain time t, of the displacement function S(x,t) of three sound waves 1,2 and 3 as marked on the curves that travel along x–axis through air. If P1 ,P2 and P3 represent their pressure amplitudes respectively, then correct relation between them is :
Figure shown is a graph, at a certain time t, of the displacement function S(x,t) of three sound waves 1,2 and 3 as marked on the curves that travel along x–axis through air. If P1 ,P2 and P3 represent their pressure amplitudes respectively, then correct relation between them is :
Physics-General
Chemistry-
Which of the following is false?
Which of the following is false?
Chemistry-General
Chemistry-
After three half lives, the percentage of fraction of amount left is
After three half lives, the percentage of fraction of amount left is
Chemistry-General
Chemistry-
in the upper atmosphere is formed by the action of neutron on
in the upper atmosphere is formed by the action of neutron on
Chemistry-General
Chemistry-
The electronic configuration of a diapositive ion 
is 2, 8,14 and its mass number is 56. The number of neutrons present is
The electronic configuration of a diapositive ion is 2, 8,14 and its mass number is 56. The number of neutrons present is
Chemistry-General
Chemistry-
Atoms with the same mass number but having different nuclear charges are called
Atoms with the same mass number but having different nuclear charges are called
Chemistry-General
Chemistry-
After three half lives, the percentage of fraction of amount left is
After three half lives, the percentage of fraction of amount left is
Chemistry-General
Chemistry-
Which of the following are stereospecific reactions?
Which of the following are stereospecific reactions?
Chemistry-General
Chemistry-
Consider the following reactions:
Which of the following are stereospecific reactions?
Consider the following reactions:
Which of the following are stereospecific reactions?
Chemistry-General
Chemistry-
In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base
Which statement is correct about the reactions?
In elimination reaction, the major product is either Saytzeff (more-substituted alkene) or Hofmann product (less-substituted alkene) depending on the nature of the substrate and the nature of the base
Which statement is correct about the reactions?
Chemistry-General
Chemistry-
Which statement is wrong in the formation of (B) from (A)
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Chemistry-General
Chemistry-
The rate of 
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In both cases, a new bond is formed. If a new bond is formed between the anion and proton, the species acts as a base. If a new bond is formed between the anion and C atom, the species acts as nucleophile
Which of the following statements is wrong?
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In both cases, a new bond is formed. If a new bond is formed between the anion and proton, the species acts as a base. If a new bond is formed between the anion and C atom, the species acts as nucleophile
Which of the following statements is wrong?
Chemistry-General
Chemistry-
Statement 1:Addition of bromine to 
-2-butene yields meso-2,3-dibromo butane
Statement 2:Bromine addition to an alkene is an electrophilic addition
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Statement 2:Bromine addition to an alkene is an electrophilic addition
Chemistry-General
