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Newtons law of colling states that the rate of colling of a body is directly proportional to the temperature difference between the body and its surrounding provided the temperature difference is small. -dq/dt is directly proportional to (T-T0). Rate of loss of heat ,-dq/dt=k (T-T0)

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What is work energy theorem

Posted by Pawan Kumar 8 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Akash Yadav 8 years, 4 months ago

The work done by force act on body is equal to change in its kinetic energy W=1/2mv^2-1/2mu^2

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Takshit Gangwar 8 years, 4 months ago

Work done by all the forces in equal to the change in kinetic energy.

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Relation between alpha ,beta,gamma?

Posted by Happy Manes 8 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Lakie Chandola 8 years, 4 months ago

Alpha =linear exp. Beta= Ariel exp. Gamma =volumetric exp.

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Lakie Chandola 8 years, 4 months ago

Alpha:beta:gamA= 1:2:3

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Takshit Gangwar 8 years, 4 months ago

They are just Greek letters. They are used to represent values and other things in science

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derive the dimension of electric flux

Posted by Rock Star 8 years, 4 months ago

CBSE > Class 11 > Physics

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A balloon tends to rise in air. Where it will have more potential energy; on the ground or at certain height above the ground?

Posted by A Z 8 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Biswajit Sahoo 8 years, 4 months ago

The potential energy increases when the balloon goes up to a height

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Define Boyle,s law

Posted by Dushyant Chauhan 8 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

A Z 8 years, 4 months ago

It states that the pressure of given mass of an ideal gas is inversely proportional to its volume at a definite temperature.

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Define velocity

Posted by Swrang Narzary 8 years, 4 months ago

CBSE > Class 11 > Physics

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A train 200m long moves with a speedo 72km/h calculate the time taken by the train to cross a bridge of length 0.8km?

Posted by Swrang Narzary 8 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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Why mercury used in barometers

Posted by Adarsh Rajput 8 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Paras Jain 8 years, 4 months ago

Because of low density

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What is Bernoulli's theorem

Posted by Aditya Anand 8 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Jitendra Nayak 8 years, 4 months ago

Total energy for an incompressible, non viscous fluid flowing with friction zero in a streamline path remains constant

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What is thermometry?

Posted by Arshiyan Khan 8 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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Define critical velocity

Posted by Sarthak Chaturvedi 8 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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What is the marking scheme of class 11 in whole year including term test and exams

Posted by Zapro Sam 8 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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A vertical U-tube of uniform inner cross section contains mercury in both arms a glycerin (density 1.3g /cm3)coloumn of length 40cm is introduced into one of the arms.Oil of density 0.8g/cm3 is poured in the other arm until the upper surfaces of the oil &glycerin are in the same horizontal level. Find the length of the oil column.

Posted by Ahana Jasrotia 8 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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A weight lifter does work in lifting the weight off the ground,but does no work in holding the weight up.WHY???

Posted by Me Souhardee❤️ 8 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Rajeev Malhotra 8 years, 4 months ago

When a weight lifter lifts a weight from ground, he does work against gravity. We define Work as Work = Force x Displacement . In this case Force acting on the object is equal to its weight and displacement is equal to height through which weight has been lifted. he does no work in holding the weight up because there is no displacement.

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What is valency

Posted by Lalith Choudhry 8 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Tannu Bhardwaj 8 years, 4 months ago

Valency of an element is the measure of combining capacity or power with other atoms when forms chemical compounds or molecules.

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Why weight is zero at the centre of the earth?

Posted by Ankita Bhadra 8 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

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Strokes law

Posted by Ravi Singh 8 years, 4 months ago

CBSE > Class 11 > Physics

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Stocks law

Posted by Ravi Singh 8 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Kusum Jaswal 8 years, 4 months ago

when a spherical body is moving in viscous medium then liquid near it will be at rest but moleculrs away it will provide a viscous drag in layers of liquid.

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relationship between Cv and Cp

Posted by Gurman Singh 8 years, 4 months ago

CBSE > Class 11 > Physics