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

According to this law:”The momentum of an isolated system of two or more than two interacting bodies remains constant.”Momentum of a system depends on its mass and velocity.A system is a group of bodies within certain boundaries .An isolated system is a group of interacting bodies on which no external force is acting.
Example:

The gun recoils when a bullet is fired.
A collision of two cars or balls

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What is the time period of 2nd pendulam

Posted by Priyanshu Negi 7 years ago

CBSE > Class 11 > Physics

2 answers

Chirag Sharma 7 years ago

Time=2π√L/g 2 (3.14)√1/9.8 = 1.9999999

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Chirag Purohit 7 years ago

2seconds

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What is thermometer

Posted by Sai Ram Ram 7 years ago

CBSE > Class 11 > Physics

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Yogita Ingle 7 years ago

Temperature is measured with the help of thermometer. Mercury and Alcohol are commonly used liquids in the liquid-in-glass thermometers.

To construct a thermometer two fixed points are to be chosen as a reference points. These fixed points are known asfreezing(ice point) and boiling point(steam point). The water freezes and boils at these two points under standard pressure.

The ice and steam point in Fahrenheit Temperature scale are 32°F and 212 °F resp.It has 180 equal intervals between two reference points.
On Celsius Scale values are 0°C and 100°C for ice and steam point resp. It has 100 equal intervals between two reference points.

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Why is it hotter at the same distance over the top of the fire then in front of it?

Posted by Chirag Malviya 7 years ago

CBSE > Class 11 > Physics

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A block of wood of mass 3kg is resting on the surface of a rough inclined surface, inclined at an angle 30 as shown in the figure:a) name the forces(1,2,3),b)if the coefficient of static friction is 0.2,calculate the value of all the three forces

Posted by Waris Sharma 7 years ago

CBSE > Class 11 > Physics

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A 1500kg car is pulled by two truckes.the tension in two ropes is 2500N and a 200N friction force oppose the motion.If car starts from rest what is its speed after 5 sevonds

Posted by Nikhil Chakole 7 years ago

CBSE > Class 11 > Physics

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The blood pressure in human is greater at the feet then at brain. Why?

Posted by Harshit Tiwari 7 years ago

CBSE > Class 11 > Physics

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Derivation of bernauli`s theorem

Posted by Harsh Jindal 7 years ago

CBSE > Class 11 > Physics

1 answers

Aashir Arham ⚽?⚽ 7 years ago

It is derivation of about 1and half page ......search in book SL Arora it is breifly explained

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Bernollies principal

Posted by Adarsh Jain 7 years ago

CBSE > Class 11 > Physics

1 answers

Prashant Singh 7 years ago

according to bernoullies principal as we move along a streamline then pressure ,kinetic energy per volumeand potential energy per volume is constant.p+pv^2/2+pgh= constant.

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What is optical density

Posted by Suraj Kumar Y 7 years ago

CBSE > Class 11 > Physics

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न्यूटन का नियम

Posted by Chandrakant Rawte 7 years ago

CBSE > Class 11 > Physics

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Define the term Cr and Cv. Derive the relation between Cr and Cv

Posted by Shruti Jat 7 years ago

CBSE > Class 11 > Physics

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What is Stroke's formula and derive it

Posted by Shubham Singh 7 years ago

CBSE > Class 11 > Physics

1 answers

Macherla Indupriya 7 years ago

Its not strokes, it's stokes law:-The viscous drag force(f) on the sphere of radius(r)with velocity (v) through a fluid of viscosity(n) is f=6πnrv.

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What is Critical velocity

Posted by Shubham Singh 7 years ago

CBSE > Class 11 > Physics

1 answers

Tarang Patel 7 years ago

Velocity at which object attend its constant velocity

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Prove that cp-cv=r

Posted by Shubham Singh 7 years ago

CBSE > Class 11 > Physics

1 answers

Rohit Lohani 7 years ago

Cp - Cv =R

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What is barnoli's threom

Posted by Shubham Singh 7 years ago

CBSE > Class 11 > Physics

1 answers

Macherla Indupriya 7 years ago

Bernoulill's theorem:-The sum of pressures(P),the kinetic energy per unit volume,the potential energy per unit volume of a fluid incompressible,non-viscous and along streamline flow remains constant.

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What is lapla's correction?

Posted by Shubham Singh 7 years ago

CBSE > Class 11 > Physics

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What is dopler's effect?

Posted by Shubham Singh 7 years ago

CBSE > Class 11 > Physics

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Define the term cp and cv. Derive the relation between cp and cv

Posted by Suman Kunwar Rathore 7 years ago

CBSE > Class 11 > Physics

2 answers

Yakshi Baliyan 7 years ago

Cp is specific heat capacity (heat required to inc. temp of one mole of substance by one degree celsius) at constant pressure and Cv is specific heat capacity at constant volume. Relation between Cp and Cv is - Cp-Cv=R where R is universal gas constant and its value is fixed

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Golu Kumar 7 years ago

CP GREATER THEN CV

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SHRuti Hooda I have answers you question of how to convert ethene to propene .. I think it was the toughest question today

Posted by Sudarshan Sharma 7 years ago

CBSE > Class 11 > Physics