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Asked by Neemit bagh

Jul 12, 2014

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

Answer.


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

Answer (2)

Asked by David

Jul 16, 2015

Prove S=ut+1/2at2 using graphical method    

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Answer (1)

Asked by Tuba

Jun 13, 2014

It is easier to pull  a lawn roller than to push it. Explain using the resolution of forces. 

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Answer (3)

Asked by Arjun Sukumaran

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...

Answer (1)

Asked by Sunny Mathew

Feb 4, 2015

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

Answer.


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...

Answer (3)

Asked by Rk sharma

Mar 6, 2015

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

According to Newton's law of cooling, we have

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

Answer (1)

Asked by Avinash Pratap singh

Apr 25, 2014

How to calculate angels beteween star and earth ? angle α ?

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Answer (2)

Asked by Neemit bagh

Jul 12, 2014

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

f = a√x + bt2, where [f] = [M L T −2], [x] = [L] and [t] = [T].

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

[f] = [a&...

Answer (1)

Asked by Sonali Sahi

Apr 17, 2015

What is parallax method? and Error?

Answer.

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

Answer (4)

Asked by Navaneeth K

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...

Answer (1)

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