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Jul 12, 2014

Find the dimensions of constant a and b occurig in van der Waal's equation . [p+a/v2][v-b]=RT



(P + a/V2) (V - b) = RT
P is pressure, V is volume and T is temperature.
[P] = [F/A]&#...

Jul 16, 2015



Jun 13, 2014



Dec 24, 2014

what are the uses of geostationary and polar satellites? what are their advantages ?



A geostationary satellite is an earth-orbiting satellite, placed at an altitude of approximately 35,800 kilometers directly over the...

Feb 4, 2015

HOW DOES THERMOS FLASK MINIMISE HEAT TRANSFER BETWEEN THE CONTENTS OF THE BOTTLE AND OUTSIDE?



The thermos flask consists of a double-walled glass vessel resting on a cork inside a metal or plastic case. The outer surface of its inner wall and the inner surface of its outer...

Mar 6, 2015

A body cools from 80 Â°C to 50 Â°C in 5 minutes.  Calculate the time it takes to cool from 60Â°C to 30 Â°C.  The temprature of the surroundings is 20Â°C.



According to Newton's law of cooling, we have

mc (T1 - T2)/t = k [(T1 + T2)/2   -  T0)]        -----------...

Apr 25, 2014



Jul 12, 2014

Write the dimensional formula of a/b in the relation f=aâˆšx+bt2 where f=force,x=distance,t=time.



f = aâˆšx + bt2, where [f] = [M L T âˆ’2], [x] = [L] and [t] = [T].

LHS is force. So both the terms on the RHS have the dimensions of force.

[f] = [a&...

Apr 17, 2015

What is parallax method? and Error?



Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured ...

Dec 1, 2014

If the radius of the earth is to shrink by 1% (mass remains the same) the acceleration due to gravity g on the Earth's surface will increase by how much % ?



The acceleration due to gravity g = GM/r2 = 9.8 m/s2

If r reduces by 1%, the new radius becomes r' = 99% of r = 99r/100 = 0.99r

New acceleration due to gr...

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