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Bernoulli's principle states that the sum of pressure energy, kinetic energy and potential energy per unit volume of an incompressible, non-viscous fluid in a streamlined irrotational flow remains constant along a streamline. • It's two applications are:- 1) Dynamic lift on the wings of an aeroplane. 2) Swinging of a spring cricket ball.

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Work done during adiabetic comprsion

Posted by Anmol Saubhari 1 year, 8 months ago

CBSE > Class 11 > Physics

1 answers

Shivans Pandey 1 year, 8 months ago

Bro in adiabatic process ∆q =0 so (in formula ∆u=q+w) on putting q=0 we get work=∆U

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Relation between work done and velocity

Posted by Naina Porwal 1 year, 8 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Dabral 1 year, 8 months ago

vi = the initial velocity of an object measured using m/s. Therefore, the work-energy principle states that: The total work done by all the forces acting on a particle or the work of the resultant force F(in subscript resultant) is equivalent to the change in kinetic energy of a particle.

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Define Pascal law?

Posted by Sourav Mishra 1 year, 8 months ago

CBSE > Class 11 > Physics

2 answers

Preeti Dabral 1 year, 8 months ago

Pascal's principle, also called Pascal's law, in fluid (gas or liquid) mechanics, statement that, in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container.

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Ashutosh Sharma 1 year, 8 months ago

Pascal law states that the pressure in a fluid at rest is the same at all points if they are at the same height

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Determine the kinetic energy a 5000kg spacecraft must have in order to escape the earth's gravitational field.mass of earth is 6.0*1024

Posted by Ritika Vats 1 year, 8 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Dabral 1 year, 8 months ago

3.14 {tex} \times {/tex} 10¹¹J

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Posted by Aamir Gour 1 year, 8 months ago

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The area of a blot of ink is growing such that after t seconds

Posted by Rudraksh Dixit 1 year, 8 months ago

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Chapter 12 Questions 1

Posted by Eveningstar Khyriem Khyriem 1 year, 8 months ago

CBSE > Class 11 > Physics

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At what time power and workdone becomes equal

Posted by Naina Porwal 1 year, 9 months ago

CBSE > Class 11 > Physics

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Divyanshu Purohit 1 year, 8 months ago

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If, y=A sin(kx-wt+ø) Velocity=? Acceleration=?

Posted by Nk Nitesh 1 year, 9 months ago

CBSE > Class 11 > Physics

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Please suggest class 11 physics working model

Posted by Sanika Sakpal 1 year, 9 months ago

CBSE > Class 11 > Physics

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Why velocity × velocity is equal to zero

Posted by Thranghok Suiam 1 year, 9 months ago

CBSE > Class 11 > Physics

2 answers

Yash Rajpoot 1 year, 8 months ago

Velocity is a vector quantity....... Or jab bhi hum do same vector ka cross krte hai to answer zero hota hai

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Ayansh Rajput 1 year, 9 months ago

Asolation due to gravity increase decrease with increase aptitude

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The Earth moving round the Sun in a circular orbit is acted upon by a force, and hence work must be done on the Earth by this force. Do you agree with this statement?

Posted by Amninder Singh 1 year, 8 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Dabral 1 year, 8 months ago

The statement is wrong. The earth moves around the sun because of the gravitational force of the sun on the earth. This force acts along the radius of the orbit of the earth towards its center. At every point during the motion, the the direction of velocity (or direction of displacement) is always perpendicular to the force.
Thus, {tex}\theta {/tex} = 90^o and
Work done, W = FS cos {tex}\theta {/tex} = FS cos90° = 0.
Hence, sun does no work on earth.

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anomalous expansion of water

Posted by Chandan Mandal 1 year, 8 months ago

CBSE > Class 11 > Physics

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Preeti Dabral 1 year, 8 months ago

The expansion of water when it is cooled from 4^oC to 0^oC is known as anomalous expansion of water.
Hope's experiment is used to demonstrate the anomalous expansion of water.

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Derive an expression for escape speed

Posted by Aryan Vijay 1 year, 9 months ago

CBSE > Class 11 > Physics

1 answers

Deepak Handi 1 year, 9 months ago

11.2km/s

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Law of gravitation

Posted by Rohan Sharma 1 year, 8 months ago

CBSE > Class 11 > Physics

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Preeti Dabral 1 year, 8 months ago

Newton's law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them.

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Mention the number of degree of freedom of a monoatomic gas

Posted by Safa Safa 1 year, 9 months ago

CBSE > Class 11 > Physics

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Yayyw H,Hhsgs 1 year, 9 months ago

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Deepak Handi 1 year, 9 months ago

120

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First law and second law of thermodynamics

Posted by Harsh Kumar 1 year, 9 months ago

CBSE > Class 11 > Physics

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Thranghok Suiam 1 year, 9 months ago

1 law Energy can neither be created nor destroy

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Posted by Jaiminkumar Shaileshbhai Chaudhary 1 year, 9 months ago

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Deepak Handi 1 year, 9 months ago

Don't post personal information, mobile numbers and other details.
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Diksha Behra 1 year, 9 months ago

No I'm not lesbian

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What is the dimensional formula of self inductance

Posted by Hamsika Reddy 1 year, 9 months ago

CBSE > Class 11 > Physics

1 answers

Harini Mp 1 year, 9 months ago

The magnetic flux is given by ϕ=LI The dimensional formula of self inductance, [L]=[I][BA]. . . . . .(1) Force, f=qvB [M1L1T−2]=[TA].[L1T−1].[B] [B]=[M1T−2A−1] [BA]=[M1L2T−2A−1] From equation (1), we get [ϕ]=[M1L2T−2A−2]

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How can I calculate in physics

Posted by Ashutosh Sharma 1 year, 9 months ago

CBSE > Class 11 > Physics

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Which particle initiates the electromagnetic force between two electrons

Posted by Kala Raman 1 year, 9 months ago

CBSE > Class 11 > Physics

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Rahul Oli 1 year, 9 months ago

The most familiar gauge boson is the photon, which transmits the electromagnetic force between electrically charged objects such as electrons and protons.

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A cricket ball of mass 0.15 kg moving with a speed of 20 ms -1 is brought to rest by a player in 0.1 s. What is the average force applied by the player?

Posted by Sahil Halpati. 1 year, 9 months ago

CBSE > Class 11 > Physics

1 answers

Harini Mp 1 year, 9 months ago

Impulse=change in momentum=m(v−u)=0.2 (0−15)=−3Ns Average force=Impulse/Time=0.053=60 N

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Why gravitational potential energy is negative

Posted by Sudhanshu Yadav 1 year, 9 months ago

CBSE > Class 11 > Physics

2 answers

Rahul Oli 1 year, 9 months ago

Gravitational P.E. is negative at the surface of Earth, because work is completed by the field in bringing a mass from infinity i.e., work needs to be done on a body, if it's moved out from the field of the earth. Thus, P.E. is negative

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Rinku Mehra 1 year, 9 months ago

Because it is attractive force

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If A+B=A-B then prove that B is zero Vector

Posted by Garima Pandey 1 year, 9 months ago

CBSE > Class 11 > Physics

1 answers

Harini Mp 1 year, 9 months ago

Let A.(AxB) = 0 As , AxB = AB sinФ n AB sinФ n is a vector which is perpendicular to the plane having A vector and B vector which implies that it is also perpendicular to A vector . As we know dot product of two vectors is zero. Thus , we can say that A.(AxB) = 0

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Explain Terminal Velocity

Posted by Ayush Raj 1 year, 9 months ago

CBSE > Class 11 > Physics

3 answers

Jaiminkumar Shaileshbhai Chaudhary 1 year, 9 months ago

It is velocity which are on terminal

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Muskan Chandra 1 year, 9 months ago

A vector is a quantity that has both a magnitude and a direction. It can be represented, geometrically, by an arrow that points in the vector's direction, and has a length equal to the vector's magnitude. The tip of the arrow is called the vector's terminal point, and the tail of the arrow is its initial point.

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Shivanshu Mishra 1 year, 9 months ago

A particle moving in a fluid attains a constant velocity after sometime of applied resistance. This is known as terminal velocity.

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