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A ring of radius r made of wire of density ρ is rotated about a stationary vertical axis passing through its centre and perpendicular to the plane of the ring as shown in the figure. Determine the angular velocity (in rad/s) of ring at which the ring breaks. The wire breaks at tensile stress σ. Ignore gravity. Take σ/ρ = 4 and r = 1 m.
10
Oct
A ring of radius r made of wire of density ρ is rotated about a stationary vertical axis passing through its centre and perpendicular to the plane of the ring as shown in the figure. Determine the angular velocity (in rad/s) of ring at which the ring breaks. The wire breaks at tensile stress σ. [...]
In a double-slit experiment, instead of taking slits of equal width, one slit is made twice as wide as the other. Then in the interference pattern
10
Oct
In a double-slit experiment, instead of taking slits of equal width, one slit is made twice as wide as the other. Then in the interference pattern In a double slit experiment instead of taking slits of equal width one slit is made twice as wide as the other. Then in the interference pattern October 10, [...]
1.Using laws of exponents, simplify and write the answer in exponential form: (i)3^2 × 3^4 × 3^8
10
Oct
1.Using laws of exponents, simplify and write the answer in exponential form: (i)3^2 × 3^4 × 3^8 1.Using laws of exponents simplify and write the answer in exponential form: (i)3^2 × 3^4 × 3^8 October 10, 2020 Category: Chapter 13 - Exponents and Powers , Maths , NCERT Class 7 ,
A light ray of frequency v and wavelength lemda enters a liquid of refractive index 3/2. The ray travels in the liquid with
10
Oct
A light ray of frequency v and wavelength lemda enters a liquid of refractive index 3/2. The ray travels in the liquid with A light ray of frequency v and wavelength lemda enters a liquid of refractive index 3/2. The ray travels in the liquid with October 10, 2020 Category: Uncategorised (JEE Advanced Physics by [...]
A wire having a length L and cross- sectional area A is suspended at one of its ends from a ceiling . Density and young’s modulus of material of the wire are ρ and Y, respectively. Its strain energy due to its own weight is ρ^2 g^2 AL^3/Y.
10
Oct
A wire having a length L and cross- sectional area A is suspended at one of its ends from a ceiling . Density and young’s modulus of material of the wire are ρ and Y, respectively. Its strain energy due to its own weight is ρ^2 g^2 AL^3/Y. A wire having a length L and [...]
The maximum intensity in Young’s double slit experiment is I0. Distance between the slit is d = 5 lemda, where lemda is the wavelength of monochromatic light used in the experiment.
10
Oct
The maximum intensity in Young’s double slit experiment is I0. Distance between the slit is d = 5 lemda, where lemda is the wavelength of monochromatic light used in the experiment. The maximum intensity in Young's double slit experiment is I0. Distance between the slit is d = 5 lemda where lemda is the wavelength [...]
On Young’s double-slit experiment, the slits are illuminated by monochromatic light. The entire set-up is immersed in pure water. Which of the following act cannot restore the original
10
Oct
On Young’s double-slit experiment, the slits are illuminated by monochromatic light. The entire set-up is immersed in pure water. Which of the following act cannot restore the original On Young's double-slit experiment the slits are illuminated by monochromatic light. The entire set-up is immersed in pure water. Which of the following act cannot restore the [...]
8.Compare the following numbers: (ii) 4 × 10^14 ; 3 × 10^17
10
Oct
8.Compare the following numbers: (ii) 4 × 10^14 ; 3 × 10^17 8.Compare the following numbers: (ii) 4 × 10^14 ; 3 × 10^17 October 10, 2020 Category: Chapter 13 - Exponents and Powers , Maths , NCERT Class 7 ,
8.Compare the following numbers: (i) 2.7×10^12 ; 1.5 x 10^8
10
Oct
8.Compare the following numbers: (i) 2.7×10^12 ; 1.5 x 10^8 8.Compare the following numbers: (i) 2.7×10^12 ; 1.5 x 10^8 October 10, 2020 Category: Chapter 13 - Exponents and Powers , Maths , NCERT Class 7 ,
Find the elastic potential energy per unit volume water ( in x 10^3 J/m^3 ) at a depth of 1 km. Given , compressibility of water = 5 x 10^10 SI units and density of water = 1000 kg/m^3.
10
Oct
Find the elastic potential energy per unit volume water ( in x 10^3 J/m^3 ) at a depth of 1 km. Given , compressibility of water = 5 x 10^10 SI units and density of water = 1000 kg/m^3. compressibility of water = 5 x 10^10 SI units and density of water = 1000 kg/m^3. [...]