Questions by varun

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A radar signal is beamed towards a planet from the earth and its echo is received seven minutes later. Calculate the velocity of the signal, if the distance between the planet and the earth is

asked Mar 19, 2022 in 11th Physics

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Give two methods for measuring time

asked Mar 19, 2022 in 11th Physics

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Find the dimensions of latent heat and specific

asked Mar 19, 2022 in 11th Physics

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in Vander Waal’s equation

asked Mar 19, 2022 in 11th Physics

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E, m, l and G denote energy, mass, angular momentum and gravitational constant respectively. Determine the dimensions of

asked Mar 19, 2022 in 11th Physics

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(a) State which of the following are dimensionally current(i) Pressure = Energy per unit volume(ii) Pressure = Momentum × volume × time(b) The density of cylindrical rod was measured by the formula:- `P=(4m)/(piD^2I)`The percentage in m, D and l are `1%, 1.5% and 0.5%.` Calculate the % error in the calculated value of

asked Mar 19, 2022 in 11th Physics

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The number of significant figures in 0.06900

asked Mar 19, 2022 in 11th Physics

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The sum of the numbers 436.32, 227.2 and 0.301 inappropriate significant figures

asked Mar 19, 2022 in 11th Physics

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The mass and volume of a body are 4.237 g and 2.5 `cm^3` , respectively. The density of the material of the body in correct significant figures

asked Mar 19, 2022 in 11th Physics

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The numbers 2.745 and 2.735 on rounding off to 3 significant figures will

asked Mar 19, 2022 in 11th Physics

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The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error

asked Mar 19, 2022 in 11th Physics

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Which of the following pairs of physical quantities does not have same dimensional

asked Mar 19, 2022 in 11th Physics

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Measure of two quantities along with the precision of respective measuring instrument is A = 2.5 m s–1 ± 0.5 m s–1 B = 0.10 s ± 0.01 s The value of A B will

asked Mar 19, 2022 in 11th Physics

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You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report correct value for `sqrt (AB)`

asked Mar 19, 2022 in 11th Physics

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Which of the following measurements is most

asked Mar 19, 2022 in 11th Physics

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The mean length of an object is 5 cm. Which of the following measurements is most

asked Mar 19, 2022 in 11th Physics

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Young’s modulus of steel is 1.9 × 1011 N/m 2 . When expressed in CGS units of dynes/cm 2, it will be equal to (1N = 105 dyne, 1 m 2 = 104 cm 2

asked Mar 19, 2022 in 11th Physics

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If momentum (P ), area (A) and time (T ) are taken to be fundamental quantities, then energy has the dimensional

asked Mar 19, 2022 in 11th Physics

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On the basis of dimensions, decide which of the following relations for the displacement of a particle undergoing simple harmonic motion is not

asked Mar 19, 2022 in 11th Physics

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If P, Q, R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful

asked Mar 19, 2022 in 11th Physics

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