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

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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 by varun (6.7k points)

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The number of significant figures in 0.06900

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

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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 by varun (6.7k points)

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

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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 by varun (6.7k points)

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

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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 by varun (6.7k points)

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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)`

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Which of the following measurements is most

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

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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 by varun (6.7k points)

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

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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

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

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Photon is quantum of radiation with energy E = hν where ν is frequency and h is Planck’s constant. The dimensions of h are the same as that

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If Planck’s constant (h ) and speed of light in vacuum (c ) are taken as two fundamental quantities, which one of the following can, in addition, be taken to express length, mass and time in terms of the three chosen fundamental

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Which of the following ratios express

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