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Calculate the temperature in Kelvin at which a perfectly black body radiates at the rate of 5.67

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How do you derive Newton’s law of cooling from Stefan’s

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A refrigerator is to maintain eatables kept inside at 90C. If room temperature is 360C, calculate the coefficient of

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Estimate the mean free path for a water molecule in water vapour at 373 K. Use information from Exercises 13.1 and Eq. (13.41) above.Example

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A body oscillates with SHM according to the equation (in SI units), x = 5 cos [2π t + π/4]. At t = 1.5 s, calculate the (a) displacement, (b) speed and (c) acceleration of the

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The flow rate of water from a tap of diameter 1.25 cm is 0.48 L/min. The coefficient of viscosity of water is `10^(-3)` Pa s. After sometime the flow rate is increased to 3 L/min. Characterise the flow for both the flow

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Explain why Surface tension of a liquid is independent of the area of the

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Explain why To keep a piece of paper horizontal, you should blow over, not under,

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A piece of copper having a rectangular cross-section of 15.2 mm × 19.1 mm is pulled in tension with 44,500 N force, producing only elastic deformation. Calculate the resulting

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How much should the pressure on a litre of water be changed to compress it by

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Suppose there existed a planet that went around the sun twice as fast as the earth. What would be its orbital size as compared to that of the earth

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Which of the following symptoms is likely to afflict an astronaut in space (a) swollen feet, (b) swollen face, (c) headache, (d) orientational

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A saturn year is 29.5 times the earth year. How far is the saturn from the sun if the earth is `1.50 × 10^8` km away from the sun

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Assuming the earth to be a sphere of uniform mass density, how much would a body weigh half way down to the centre of the earth if it weighed 250 N on the surface

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Find the centre of mass of a uniform L-shaped lamina (a thin flat plate) with dimensions as shown. The mass of the lamina is 3

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Show that a.(b × c) is equal in magnitude to the volume of the parallelepiped formed on the three vectors , a, b and

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The relation between acceleration and displacement of four particles are given

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The phenomena that optics deals with

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A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure

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Let `l, r, c and v` represent inductance, resistance, capacitance and voltage, respectively. The dimension of `l/(rcv)` in SI rev units will

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