CBSE > Class 11 > Physics | CBSE Board | Homework Help

Velocity of effux is also know an torricles low In this It states that the velocity of fluid whuch exict throw a orific is an equal to the Velocity of body faaling under free faaling motion

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To derive newton 1st law and 3rd law using 2nd law of newton?

Posted by Meenakshi Anand 6 years ago

CBSE > Class 11 > Physics

2 answers

Abhijeet Chaudhary 6 years ago

Cundider to boll collide with each other A and B than force on A F=dp/dt and force on 2nd boll is. dp•/dt• . Now add both the equation F¹+F² =dp¹/dt+dp²/dt.. now take 1/dt(p¹+p²)and by momentum cunservation p¹+p²=0 so F¹+F²=o and F²=-F¹ hence proved

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Abhijeet Chaudhary 6 years ago

F=ma and we know that if v is constant than than a= o so F = o and it verify newton 1st low no external force aplide on that body

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State the Laws of Vibration of Stretched Stings.

Posted by Dev Singh 6 years ago

CBSE > Class 11 > Physics

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A body is executing shm in a tunnel dig inside the earth passing through its centre.

Posted by Seema Das 6 years ago

CBSE > Class 11 > Physics

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Why steel is more elastic than rubber ?

Posted by Shaksham Aryan 6 years ago

CBSE > Class 11 > Physics

2 answers

Abhijeet Chaudhary 6 years ago

Because of yield point of steel is greater than the rubber

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Shivam Sharma 6 years ago

You must have seen stress strain graph. When on applying very low stress the strain is very much in case of rubber. Practically also u need very small force to strech a rubber. But it breaks easily that means it doesn't posses much plasticity. While need a lot of force to strech a steel is required and its plasticity period is large. I doesn't break easily intead it occupies a new strech limit after every streching.

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The centripetal force of a body moving in circular motion depends upon the radius of circular path , velocity of the body and mass of the body.Derive the formula of centripetal force using the method of dimensions

Posted by Ravinder Kumar 6 years ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 6 years ago

The centripetal force F acting on a particle moving uniformly in a circle may depend

upon mass (m), velocity (v), and radius (r) of the circle.

Derivation of the formula for 'F' using the method of dimensions is based on the principle of comparing the dimesions of the

Fundamental unit and the derived formula.

We assign a coffeicient of proportionality 'k' and compare the powers of the similar base (physical quantity)

After getting the values of the powers of the derived formula, we obtain the formula in terms of the mentioned physical quantitites.

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An ideal gas is compressed at constant temprature what will be effect on internal energy

Posted by Vibhanshu Singh 6 years ago

CBSE > Class 11 > Physics

4 answers

Abhijeet Chaudhary 6 years ago

Wok done = nRTlnv²/v¹

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Ekta E 6 years ago

du =0

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Samedonhi Lapasam 6 years ago

Tp de ka ne paiu

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Gaurav Seth 6 years ago

As per first law of thermodynamics, conservation of energy is dq = du + pdV, where dq = thermal energy of gas du = change in internal energy of gas pdV = work done by gas in expanding due to change in volume dV If T = const., dT = 0 and d(pV) = 0 as pressure and If T = const., dT = 0 and d(pV) = 0 as pressure and volume are inversely proportional. Also, dq = pdV, which shows that there is no change in internal energy.Read more on Sarthaks.com - https://www.sarthaks.com/217713/an-ideal-gas-compressed-constant-temperature-will-its-internal-energy-increase-decrease

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Cp--Cv=R

Posted by Suraj Dubey 6 years ago

CBSE > Class 11 > Physics

3 answers

Sid Siddharth 6 years ago

qp=nCp∆t=∆U qv=nCv∆t=∆H And As we know that ∆H=∆U+∆(pv) And ∆(pv)=nR∆t Now ∆H=∆U+nR∆t nCp∆t=nCv∆t+nR∆t And Cp=Cv+R Cp-Cv=R Hence proved

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Shivam Sharma 6 years ago

Put values of Cp and Cv you will get answer

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Ekta E 6 years ago

Question kya hai?

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Prove that surface tension is numerically equal to surface energy.

Posted by Anjali Sharma 6 years ago

CBSE > Class 11 > Physics

3 answers

Abhijeet Chaudhary 6 years ago

T=F/l and = Fs/ls= work done /A = serface energy / area

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Sapna Siya 6 years ago

Let a ractangular frame ABCD Length =L Incrase in length= X Force acting= T× 2L Workdone in increase the surface area W= T × 2L × X Increase in area = 2L × X Surface energy =workdone in increase the surface area/increase in area Surface energy = T×2L× X/2L ×X Surface energy = T Surface energy = surface tension

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Yash Agarwal 6 years ago

Who the hell said you that they both are numerically equal

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Explain the process of Sodi Carnot engine.

Posted by Siddharth Upadhyay 6 years ago

CBSE > Class 11 > Physics

1 answers

Neeraj Arora 6 years ago

Bhuuuuuum

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Second law of thermodynamics

Posted by Robinpreet Kaur 6 years ago

CBSE > Class 11 > Physics

2 answers

Ekta E 6 years ago

Acc.to 2nd law, it is impossible to get continuous supply of work by cooling a body lower than the temperature of coolest body in its surroundings

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Siddharth Upadhyay 6 years ago

There is no any engine which have 100 percentage efficienty

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Difference between center of mass and center of gravity

Posted by Amritlal Gupta 6 years ago

CBSE > Class 11 > Physics

4 answers

Yash Agarwal 6 years ago

Centre of gravity is actually centre of mass it does not act anywhere

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Pranali Magdum 6 years ago

Centre of gravity acts everywhere on body but centre of mass concentrate at one point only

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Yash Agarwal 6 years ago

Ya hw is right actually they are same only spelling difference is there

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Neeraj Arora 6 years ago

Spelling

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Derive an expression for maximum speed a vehicle should have, to take turn on a banked road. Hence deduce expression for angle of banking at which there is miminum wear and tear to the tyres of the vehicle.

Posted by Abc Xyz 6 years ago

CBSE > Class 11 > Physics

0 answers

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car starts from rest and moves with constant acceleration such that its speed becomes weak after time t find the power delivered by it engine at time t if its mass is m

Posted by Prabhat Bolia 6 years ago

CBSE > Class 11 > Physics

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define COM? Derive an expression for position vector of two particle system.

Posted by Yrs Vlogs 6 years ago

CBSE > Class 11 > Physics

1 answers

Joginder Kumar 6 years ago

Chapter 1 low of conservation ,conservative force

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Explain carnot engine

Posted by Vansh Prajapati 6 years ago

CBSE > Class 11 > Physics

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what is the use of zener diode

Posted by Praveen Sharma 6 years ago

CBSE > Class 11 > Physics

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Derive an expression on work done on isothermal expansion

Posted by Thor Ragnarok Yo Yo Bro 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Ekta E 6 years ago

nRTloge v2/v1

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Can a body moving with 0 velocity have a non zero speed ?

Posted by Nikita Swain 6 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Beast Boy 6 years, 1 month ago

Yes it's possible, when there will be zero displacement for example if Nikita starts running on a circular field from point X and returns their after some time then displacement will be zero but she has travelled some distance therefore there will be some speed

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What is collision?

Posted by Pratik Singh 6 years, 1 month ago

CBSE > Class 11 > Physics