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

No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

Derive and expresion exxess pressure inside aliquid

Posted by Azad Khan 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 8 months ago

Consider a liquid drop of radius 'r' . The molecules on the surface of the drop experience a resultant force acting inwards due to surface tension. Therefore, pressure inside the drop will be greater then pressure outside the drop. It provides a force acting outwards perpendicular to the surface, to balance the resultant force due to surface tension. Let the drop be divided into two equal halves.
Considering the equilibrium of the upper hemisphere of the drop, the upward force due to excess pressure will be P π r² , where P is the pressure.
If 'T' is the surface tension then force acting downward along the circumference of the circle due to surface tension is T2πr .
At equilibrium,
P π r² = T 2 π r
P = 2T/r
which is the required pressure.

ANSWER

What is doplers effect?

Posted by Nisha Yadav 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sarthak Salsankar 5 years, 8 months ago

The apparent change in frequency of the wave due to motion of the source or the observer is called Doppler effect

ANSWER

Simple pandulam

Posted by Mukesh Prajapat 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Gar Ima 5 years, 8 months ago

A pandulam is a weight suspended from a povit so that it can swing freel

ANSWER

A passenger arriving a new town wishes to go from the station to a hotel located 10 km away on a straight road from the station. A dishonest cabman takes him along a circuitous path 23 km long and reaches the hotel in 28 min. What is (a)the average speed of the taxi (b)the magnitude of average velocity ? Are the two equal

Posted by Umang Kumar Singh 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is terminal velocity. Derive expression for it.

Posted by Play Boy 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Aparna Mehra 5 years, 8 months ago

Consider a spherical body of radius r falling through a viscous fluid having density sigma and cofficient if viscosity eta

Aparna Mehra 5 years, 8 months ago

When a body is dropped in a viscous fluid it is first accelerated and then its acceleration becomes zero and its attain a velocity is called terminal velocity

ANSWER

Proof of Bernoulli theorem

Posted by Kumkum Pathak 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Why we can not travel in space

Posted by Ritik Yadav 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Ekta Guleria 5 years, 8 months ago

We can travel in space bro?

Juju_On_My_Beat .Don 5 years, 8 months ago

We can

ANSWER

Kapeler's law

Posted by Anjali Gupta 5 years, 8 months ago

CBSE > Class 11 > Physics

4 answers

Priyanka V 5 years, 8 months ago

I hope this may help u....???

Priyanka V 5 years, 8 months ago

Kepler formulated 3 laws of planetary motion:- 1st law:-Every planet revolve around the sun in an elliptical orbit The sun is situated at the foci of the eclipse. 2nd law:-Line joining a planet to the sun swipes out equal area in equal time i.e.the areal velocity of a planet around the sun is constt. 3rd law:-square of time period of a planet revolves around thesun is directly proportinal to tje cube of semi measure axes.

Jassi Midha 5 years, 8 months ago

The areal velocity is constant of a planet at any instant of time

Anjali Gupta 5 years, 8 months ago

Earth is revolve in a circular orbit

ANSWER

Geostationary

Posted by Anjali Gupta 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Ankit Singh 5 years, 8 months ago

A geostationary orbit, also referred to as a geosynchronous equatorial orbit, is a circular geosynchronous orbit 35,786 kilometres above Earth's equator and following the direction of Earth's rotation.

Jassi Midha 5 years, 8 months ago

It is the satelite which is situated at equitorual line and revolve around earth as the speed of earth It is useful in communication media etc.

ANSWER

a child sits stationary at one and of a pong trophy moving uniformly with speed v on a smooth horizontal floor. the child gets up and runs about on trolly with speed vnot in any manner. the speed of the trolly+child by system is:a(v+vnot) b(v-vnot) c(v) d(zero)

Posted by Vinay Lakra 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is elastic behaviour of solids

Posted by Saurabh Parlikar 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is coefficient of performance?

Posted by Lijo Jose 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 8 months ago

The coefficient of performance is the ratio of heat absorbed from sink to the work done on the working substance to reject the heat.

Mathematically, it is given by

β = Q₂/W = Q₂/Q₁ - Q₂

ANSWER

Angular momentum

Posted by Ankit Kumar 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 8 months ago

The property of any rotating object given by moment of inertia times angular velocity.
It is the property of a rotating body given by the product of the moment of inertia and the angular velocity of the rotating object. It is a vector quantity, which implies that here along with magnitude, direction is also considered.

ANSWER

What is the coefficient of restitution?

Posted by Aniket Rajwanshi 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Harshit Dubey 5 years, 8 months ago

Coffecient of restitution is coffiecient of kinetic friction ÷R

ANSWER

Physics is a.......

Posted by Ankur Jaiswal 5 years, 8 months ago

CBSE > Class 11 > Physics

3 answers

Irfan Alam 5 years, 8 months ago

Sir dard and a pill full of pressure and tension.

Ankur Jaiswal 5 years, 8 months ago

I don't mean these

Sid Siddharth 5 years, 8 months ago

Science of matter and its motion

ANSWER

Bernoulli's principle definition and derivation

Posted by Ashish Rodhiya 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Sid Siddharth 5 years, 8 months ago

P+density.g.h +1/2.density.v^2== constant

Sid Siddharth 5 years, 8 months ago

The sum of pressure,pottential and kinetic energy is constant

ANSWER

Derive the equation of projectile motion?

Posted by Anubhava Mishra 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sid Siddharth 5 years, 8 months ago

Y=x.tanTheta [1-x/R]

ANSWER

Derive expression for centripetal acceleration of an object moving along a circular path with constant speed.

Posted by Disha Singh 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sid Siddharth 5 years, 8 months ago

a=v^2/r Or a=w^2R

ANSWER

Fill up 3.0 m/s 2 =_______km/hr 2

Posted by Krishna Gautam 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sid Siddharth 5 years, 8 months ago

0.8 something

ANSWER

Anyone from ssm?

Posted by Irfan Alam 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sid Siddharth 5 years, 8 months ago

What is ssm

ANSWER

From cbse textbook charging by induction

Posted by Ram. Rc 5 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Speed of light in air?

Posted by Binod Bhattar 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Aditya Verma 5 years, 8 months ago

3×10^8 m/s in all medium.

ANSWER

Class11physics final exam question paper year 2018 with solution

Posted by Nandita Gopal 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Class11physics year2018 final exam question paper

Posted by Nandita Gopal 5 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

Sid Siddharth 5 years, 8 months ago

Plz check on google

ANSWER

Cbse 2013. 14 solutions sample paper

Posted by Pradum Dubey 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Convert 37 degree in sconds

Posted by Sahil Ali 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

which of the following remains constant in simple harmonic motion (a)restoring force(b)amplitude (c)kinetic energy (d)time period

Posted by Santosh Yadav 5 years, 8 months ago

CBSE > Class 11 > Physics

3 answers

Ekta E 5 years, 8 months ago

(b) option

V Gupta 5 years, 8 months ago

Amplitude

Omanshi Singh 5 years, 8 months ago

Amplitude remain constant

ANSWER

Marking scheme of finale paper of physics

Posted by Brij Kishor Goud 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Sachin Sundriyal 5 years, 8 months ago

Wahhhh?

Jeetu Jorwaal 5 years, 8 months ago

Marking scheme of final paper physics

ANSWER

Show that in the absence of external force , velocity remain constant

Posted by Taruntannu Rajput 5 years, 8 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is conservative force?

Posted by Najma Khatoon 5 years, 8 months ago

CBSE > Class 11 > Physics

4 answers

Aditya Verma 5 years, 8 months ago

It depend upon initial and final position, not path followed by body. Eg. Gravitational force.

Samarth Bhalerao 5 years, 8 months ago

Work done by force in a complete cycle is 0,then it is conservative force.

Ekta E 5 years, 8 months ago

Force which is independent of path followed by body

Sid Siddharth 5 years, 8 months ago

It is indepemdent on path

ANSWER

Page 145 of 557

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App