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 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Abhijeet Chaudhary 5 years, 8 months 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 5 years, 8 months 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 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

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Why steel is more elastic than rubber ?

Posted by Shaksham Aryan 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Abhijeet Chaudhary 5 years, 8 months ago

Because of yield point of steel is greater than the rubber

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Shivam Sharma 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics

4 answers

Abhijeet Chaudhary 5 years, 8 months ago

Wok done = nRTlnv²/v¹

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Ekta E 5 years, 8 months ago

du =0

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Samedonhi Lapasam 5 years, 8 months ago

Tp de ka ne paiu

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Gaurav Seth 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics

3 answers

Sid Siddharth 5 years, 8 months 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 5 years, 8 months ago

Put values of Cp and Cv you will get answer

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Ekta E 5 years, 8 months ago

Question kya hai?

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Prove that surface tension is numerically equal to surface energy.

Posted by Anjali Sharma 5 years, 8 months ago

CBSE > Class 11 > Physics

3 answers

Abhijeet Chaudhary 5 years, 8 months ago

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

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Sapna Siya 5 years, 8 months 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 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Neeraj Arora 5 years, 8 months ago

Bhuuuuuum

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Second law of thermodynamics

Posted by Robinpreet Kaur 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Ekta E 5 years, 8 months 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 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics

4 answers

Yash Agarwal 5 years, 8 months ago

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

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Pranali Magdum 5 years, 8 months ago

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

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Yash Agarwal 5 years, 8 months ago

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

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Neeraj Arora 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics

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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 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

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

Posted by Yrs Vlogs 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Joginder Kumar 5 years, 8 months ago

Chapter 1 low of conservation ,conservative force

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Explain carnot engine

Posted by Vansh Prajapati 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

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what is the use of zener diode

Posted by Praveen Sharma 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

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Derive an expression on work done on isothermal expansion

Posted by Thor Ragnarok Yo Yo Bro 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Ekta E 5 years, 8 months ago

nRTloge v2/v1

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

Posted by Nikita Swain 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Beast Boy 5 years, 8 months 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 5 years, 8 months ago

CBSE > Class 11 > Physics