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Define S.I. unit of solid

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Name physical quantities whose units are electron volt and

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When a planet X is at a distance of 824.7 million kilometers from earth its angular diameter is measured to be `35.72^(11)` of arc. Calculate the diameter of

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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

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Give two methods for measuring time

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Find the dimensions of latent heat and specific

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in Vander Waal’s equation

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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

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Why do we have different units for the same physical

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The radius of atom is of the order of 1 Å and radius of nucleus is of the order of fermi. How many magnitudes higher is the volume of atom as compared to the volume of

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Name the device used for measuring the mass of atoms and

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Express unified atomic mass unit in

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A function f (θ ) is defined as: `f(θ)=1- θ+θ^2/(2!)-θ^3/(3!)+θ^4/(4!)........` Why is it necessary for q to be a dimensionless

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Why length, mass and time are chosen as base quantities in

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The earth-moon distance is about 60 earth radius. What will be the diameter of the earth (approximately in degrees) as seen from the

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Moon is seen to be of `(1⁄2)^°` diameter from the earth. What must be the relative size compared to the

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From parallax measurement, the sun is found to be at a distance of about 400 times the earth-moon distance. Estimate the ratio of sun-earth

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Which of the following time measuring devices is most precise? A wall

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Which of the following time measuring devices is most precise? A stop

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