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Each of the two strings of length $51.6 \text{ cm}$ and $49.1 \text{ cm}$ are tensioned separately by $20 \text{ N}$ force. Mass per unit length of both the strings is same and equal to $1 \text{ g m}^{-1}$. When both the strings vibrate simultaneously the number of beats is:
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of $27^\circ\text{C}$, two successive resonances are produced at $20 \text{ cm}$ and $73 \text{ cm}$ column length. If the frequency of the tuning fork is $320 \text{ Hz}$, the velocity of sound in air at $27^\circ\text{C}$ is:
If we study the vibration of a pipe open at both ends, then which of the following statements is not true:
An element that cannot form [MF6]3- ion is-
Sound waves travel at $350 \text{ m/s}$ through warm air and at $3500 \text{ m/s}$ through brass. The wavelength of a $700 \text{ Hz}$ acoustic wave as it enters brass from warm air:
Consider the below reaction and identify the missing reagent/chemical. $$CH_3CH_2COO^-Na^+ + NaOH \xrightarrow{?, \ \Delta} CH_3CH_3 + Na_2CO_3$$
Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?
The time of reverberation of a room $A$ is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double those of room $A$?
A transverse wave propagating along the $x$-axis is represented by: $y(x,t) = 8.0\sin(0.5\pi x - 4\pi t - \frac{\pi}{4})$, where $x$ is in meters and $t$ in seconds. The speed of the wave is:
The ratio of the dimension of Planck's constant and that of moment of inertia is the dimension of
The $4^{\text{th}}$ overtone of a closed organ pipe is the same as that of the $3^{\text{rd}}$ overtone of an open pipe. The ratio of the length of the closed pipe to the length of the open pipe is:
In Young's double-slit experiment, if there is no initial phase difference between the light from the two slits, a point on the screen corresponding to the fifth minimum has a path difference:
The unit of power is:
Two coherent sources of light interfere and produce fringe patterns on a screen. For the central maximum, the phase difference between the two waves will be:
The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is
After passing through a polarizer, a linearly polarized light of intensity $I$ is incident on an analyser making an angle of $30^{\circ}$ with the axes of the polariser. The intensity of light emitted from the analyser will be:
If the monochromatic source in Young's double slit experiment is replaced by white light, then:
If the screen is moved away from the plane of the slits in Young's double slit experiment, then the:
For Young's double-slit experiment, two statements are given below: Statement I: If screen is moved away from the plane of slits, angular separation of the fringes remains constant. Statement II: If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.
Name the gas that can readily decolourise acidified $\text{KMnO}_4$ solution.