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The spherical ball contracts in volume by 0.1% when subjected to a uniform normal pressure of 100 atmosphere calculate the bulk modulus of material of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Calculate the difference between two principal specific heats of 1g of helium gas at N. T. P. Given Molecular weight of Helium = 4 and J = 4.186 J/cal and Universal Gas constant, R = 8.314J / mole /

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If for hydrogen `C_P – C_V = a` and for oxygen `C_P – C_V = b` where `C_P & C_V` refer to specific heat at constant pressure and volume then what is the relation between a and

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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An indirectly heated filament is radiating maximum energy of wavelength `2.16xx 10^(-7)m`. Find the net amount of heat energy lost per second per unit area, the temperature of surrounding air is `13^oC`. Given `b = 2.88xx10^(-3) mk, σ = 5.77xx10(-8)

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Briefly describe a Carnot cycle and derive an expression for the efficiency of Carnot

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A geyser heats water flowing at the rate of 3.0 litres per minute from 27 °C to 77 °C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is `4.0 × 10^4` J/g

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A thermodynamic system is taken from an original state to an intermediate state by the linear process shown in Fig. ) Its volume is then reduced to the original value from E to F by an isobaric process. Calculate the total work done by the gas from D to E to

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Estimate the mean free path and collision frequency of a nitrogen molecule in a cylinder containing nitrogen at 2.0 atm and temperature 17 0C. Take the radius of a nitrogen molecule to be roughly 1.0 Å. Compare the collision time with the time the molecule moves freely between two successive collisions (Molecular mass of `N_2`=28.0

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A block whose mass is 1 kg is fastened to a spring. The spring has a spring constant of 50 N `m^(–1)`. The block is pulled to a distance x = 10 cm from its equilibrium position at x = 0 on a frictionless surface from rest at t = 0. Calculate the kinetic, potential and total energies of the block when it is 5 cm away from the mean

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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One end of a U-tube containing mercury is connected to a suction pump and the other end to atmosphere. A small pressure difference is maintained between the two columns. Show that, when the suction pump is removed, the column of mercury in the U-tube executes simple harmonic

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two sitar strings A and B playing the note ‘Dha’ are slightly out of tune and produce beats of frequency 5 Hz. The tension of the string B is slightly increased and the beat frequency is found to decrease to 3 Hz. What is the original frequency of B if the frequency of A is 427 Hz

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A rocket is moving at a speed of 200 m `s^(–1)` towards a stationary target. While moving, it emits a wave of frequency 1000 Hz. Some of the sound reaching the target gets reflected back to the rocket as an echo. Calculate (1) the frequency of the sound as detected by the target and (2) the frequency of the echo as detected by the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength of (a) the reflected sound, (b) the transmitted sound? Speed of sound in air is 340 m `s^(–1)` and in water 1486 m

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Explain why (or how): (a) in a sound wave, a displacement node is a pressure antinode and vice versa, (b) bats can ascertain distances, directions, nature, and sizes of the obstacles without any “eyes”, (c) a violin note and sitar note may have the same frequency, yet we can distinguish between the two notes, (d) solids can support both longitudinal and transverse waves, but only longitudinal waves can propagate in gases, and (e) the shape of a pulse gets distorted during propagation in a dispersive

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium. (a) Does the pulse have a definite (i) frequency, (ii) wavelength, (iii) speed of propagation? (b) If the pulse rate is 1 after every 20 s, (that is the whistle is blown for a split of second after every 20 s), is the frequency of the note produced by the whistle equal to 1/20 or 0.05 Hz

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Blood velocity: The flow of blood in a large artery of an anesthetised dog is diverted through a Venturi meter. The wider part of the meter has a cross sectional area equal to that of the artery.A = 8 `mm^2`. The narrower part has an area a = 4 `mm^2`. The pressure drop in the artery is 24 Pa. What is the speed of the blood in the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Glycerine flows steadily through a horizontal tube of length 1.5 m and radius 1.0 cm. If the amount of glycerine collected per second at one end is `4.0 × 10^(–3)` kg `s^(–1)` , what is the pressure difference between the two ends of the tube ? (Density of glycerine = `1.3 × 10^(–3)` kg `m^(–3)` and viscosity of glycerine = 0.83 Pa s). [You may also like to check if the assumption of laminar flow in the tube is

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Figure shows the strain-stress curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material?

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The stress-strain graphs for materials A and B are shown in Fig.. The graphs are drawn to the same scale. (a) Which of the materials has the greater Young’s modulus? (b) Which of the two is the stronger material?

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two wires of diameter 0.25 cm, one made of steel and the other made of brass are loaded as shown in Fig.. The unloaded length of steel wire is 1.5 m and that of brass wire is 1.0 m. Compute the elongations of the steel and the brass wires.

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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