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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:
The unit of power is:
Identify the incorrect statement from the following:
In which of the following systems of units is the Weber the unit of magnetic flux?
Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?
The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is
The dimensions of shear modulus are
Two similar thin equi-convex lenses, of focal length $f$ each, are kept coaxially in contact with each other such that the focal length of the combination is $F_1$. When the space between the two lenses is filled with glycerine (which has the same refractive index ($\mu = 1.5$) as that of glass) then the equivalent focal length is $F_2$. The ratio $F_1 : F_2$ will be :
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:
A small steel ball of radius $r$ is allowed to fall under gravity through a column of a viscous liquid of coefficient of viscosity $\eta$. After some time, the velocity of the ball attains a constant value known as terminal velocity $v_T$. The terminal velocity depends on the mass of the ball $m$, $\eta$, $r$, and acceleration due to gravity $g$. Which of the following relations is dimensionally correct?
Dimensions of coefficient of viscosity are
A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is : ($\alpha_{Cu} = 1.7 \times 10^{-5}$ K$^{-1}$ and $\alpha_{Al} = 2.2 \times 10^{-5}$ K$^{-1}$)
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.
Dimensions of stress are:
Match List-I with List-II: **List-I (Quantum number)** (a) $n = 2, l = 1$ (b) $n = 3, l = 2$ (c) $n = 3, l = 0$ (d) $n = 2, l = 0$ **List-II (Orbital)** (i) 2s (ii) 3s (iii) 2p (iv) 3d Choose the correct answer from the options given below:
Whose dimensions are $ML^2T^{-1}$?
Which of the following is not equal to a watt?
If the dimensions of a physical quantity are given by $[M^a L^b T^c]$, then the physical quantity will be:
The value of electron gain enthalpy of $Na^+$, if $IE_1$ of Na = 5.1 eV, is:
Which of the following is the correct sequence of reagents for converting 4-nitrotoluene to 2-bromotoluene?