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Pnet = Pi - Pa Now, as the radius of the drop has increased, work has been done by the net internal pressure. So, this work done will be W = force x displacement or W = (pressure x area) x displacement and in this case W = (pressure x area) x increase in drop radius so, the work done will be W = (P net x 4?r 2 ) x dr (1) but, the increase potential energy will be twice dU = 16?r.dr x S (2) this is because in case of a bubble there are two free surfaces, the outside surface and the inside surface. The potential energy will thus change accordingly. so, as (1) equals (2), we have (Pnet x 4?r2) x dr = 16?r.dr x S or the net pressure inside a bubble will be Pnet = 4S / r [twice than the that inside the drop]

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A rod AC of length l and mass m is kept on a horizontal smooth plane. It is free to rotate and move. A particle of same mass m moving on the plane with velocity v strikes rod at point B making angle 37° with the rod. The collision is elastic

Posted by Hemang Agrawal 8 years ago

CBSE > Class 11 > Physics

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Defination of beat frequency ?

Posted by Yash Yadav 8 years ago

CBSE > Class 11 > Physics

0 answers

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What is the temperature of vaccum

Posted by Shikha Singh 8 years ago

CBSE > Class 11 > Physics

1 answers

Sanchit Varshney 8 years ago

0 kelvin

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difference between gravity and acceleration due to gravity

Posted by Mytrika Varshitha 8 years ago

CBSE > Class 11 > Physics

2 answers

Jitendra Nayak 8 years ago

No gravity is a force of attraction but acc due to gravity is acceleration caused by force of gravity

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Akash Rastogi 8 years ago

There is no net difference Only one difference is that this cant be negative and direction is towards earth core on the other hand simple acc can be in any direction

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Question format for physics practical plz tell the sequence!!??????

Posted by Me Souhardee❤️ 8 years ago

CBSE > Class 11 > Physics

1 answers

Akash Rastogi 8 years ago

There you will have to perform an experiment regarding your syllabus and you have to write this on your answer sheet with aim materials required procedure least count observation table source of error precautions conclusion Teacher would ask 2 or three que from this and from your file or from your whole syllabus don.t worry I have also done this first time in sept

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Connected bodies

Posted by Priya Singh 8 years ago

CBSE > Class 11 > Physics

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Derive the expression for bernauliis principal

Posted by Jagmohan Singh 8 years ago

CBSE > Class 11 > Physics

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Deduce expression for young’s modulus of material of a wire of length ‘l’, radius of cross section ‘r’ loaded with a body of mass M producing an extension Δl in it.

Posted by Jagriti Shrey 8 years ago

CBSE > Class 11 > Physics

2 answers

Nitin Paliwal 3 years, 10 months ago

Y = M * g * l/ πr² * ∆l

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Janani Kp 4 years, 6 months ago

deduce the expression of Young's modulus of a wire in terms of its radius

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what is spectrum

Posted by Sayan Singh 8 years ago

CBSE > Class 11 > Physics

1 answers

Sanchit Varshney 8 years ago

The spilitig of white light in to its seven constituents colour is called spectrum

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A rubber ball of mass 50g fall from height of 100cm and rebound to a height of 50cm. Find the impulse and average force between the ball and the ground, if time of contact is 0.1s? Please help by giving explanation of each step.

Posted by Manish Chaudhary 8 years ago

CBSE > Class 11 > Physics

0 answers

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What is Reynolds number?

Posted by Vimal Kumar 8 years ago

CBSE > Class 11 > Physics

2 answers

Shantanu Singh 8 years ago

It is a dimensionless parameter which determines the nature of flow of liquid. Itbis given by=Reyonld's number= Density ×Velocity×Diameter÷Coefficient of viscosity

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Manoranjan Singh 8 years ago

It is dimensionless quantity in fluid mechanism. It helps to predect flow pattern in different fluid flow situation

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what is projrctile

Posted by Prajwal Asnotikar 8 years ago

CBSE > Class 11 > Physics

1 answers

Manoranjan Singh 8 years ago

It two dimensional motion in which acceleration acting on the body is only due to earth is called projrctile

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Relation between two specific heat of gas

Posted by Deepika Mandal 8 years ago

CBSE > Class 11 > Physics

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Why does the direction of motion of projectile becomes horizontal at the highest point of its trajectory?

Posted by Devendra Rajput 8 years ago

CBSE > Class 11 > Physics

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What is the major difference between circular motion and rotational motion?

Posted by A Z 8 years ago

CBSE > Class 11 > Physics

1 answers

Kanchan Lata 8 years ago

Circular motion had a complete cycle with a goxed centrewhile rotational motion have a complete rotation of any object.

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What is annular disk?

Posted by Shashwat Tripathi 8 years ago

CBSE > Class 11 > Physics

0 answers

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Any questions

Posted by Bharti Rathore 8 years ago

CBSE > Class 11 > Physics

1 answers

Raghvendra Yadav 8 years ago

What is the value of 0^0

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Which is more elastic rubber or steel?explain

Posted by Shivam Chouhan 8 years ago

CBSE > Class 11 > Physics

5 answers

Vaishnavi Sharma 8 years ago

Steel

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Himanshu Sharma 8 years ago

Steel

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Tannu Bhardwaj 8 years ago

Steel because it has high young's modulus of elasticity

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Anmol Dwivedi 8 years ago

Steel because it's elasticity is high

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Shefali Rajput 8 years ago

Steel

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What is time machine

Posted by Harshita Verma 8 years ago

CBSE > Class 11 > Physics

0 answers

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Find the center of mass of a thin road?

Posted by Davender Singh 8 years ago

CBSE > Class 11 > Physics

1 answers

Amit Singh 8 years ago

Centre of Mass of a rod is mainly L/2, if it passes through centre of mass and is perpendicular to the plane then Moment of Inertia is ML^2/12

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Define Angular velocity with it's derivation??

Posted by Davender Singh 8 years ago

CBSE > Class 11 > Physics

1 answers

Anmol Dwivedi 8 years ago

The angular displacement coverd in per unit time is called angular velocity

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Rotational Dynamics

Posted by Arnab Haldar 8 years ago

CBSE > Class 11 > Physics

0 answers

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What are orthogonal vectors

Posted by Shubhankar Boudh 8 years ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years ago

Orthogonal Vectors:Two vectors u and v whose dot product is u·v=0 (i.e., the vectors are perpendicular) are said to be orthogonal. In three-space, three vectors can be mutually perpendicular.

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A car starts from p and follows the path as show in figure.finally car stops at R find the distance travelled and displacement of the car if a=7m b=8m and r=11by py m

Posted by Rehan Kalam 8 years ago

CBSE > Class 11 > Physics