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

Stokes' law. the law that the force that retards a sphere moving through a viscous fluid is directly proportional to the velocity of the sphere, the radius of the sphere, and the viscosity of the fluid. the law that the frequency of luminescence induced by radiation is usually less than the frequency of the radiation.

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what do you meant by strain

Posted by Ningthoujam Jamson 8 years ago

CBSE > Class 11 > Physics

1 answers

Shivam Srivastava 8 years ago

It is ratio of change in dimensions to original dimensions

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what domy you meantmy by strain

Posted by Ningthoujam Jamson 8 years ago

CBSE > Class 11 > Physics

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if the resistance R of a wire of lenght L be 16ohm .if we cut the wire into 4equal parts and stretch each of the wire equal to its original length .then what is the resistance of the wire?

Posted by Debjyoti Das 8 years ago

CBSE > Class 11 > Physics

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Formula and its derivation of automobile hydraulic lift

Posted by Aditya Bhattacharya 8 years ago

CBSE > Class 11 > Physics

1 answers

Jitendra Nayak 8 years ago

F/A=f/a on both sides of lift

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Which is more elastic rubber or steel

Posted by Ashish Kumar 8 years ago

CBSE > Class 11 > Physics

2 answers

Vishakha Mishra 8 years ago

Rubber

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Sourbh Sourbh 8 years ago

Rubber

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Chapter 10 mechanical properties of fluid can u give me more competition type questions with answers..

Posted by Rajnandani Verma 8 years ago

CBSE > Class 11 > Physics

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Vduu

Posted by Shivam Khandelwal 8 years ago

CBSE > Class 11 > Physics

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Why shear modulus is less than Young's modulus?

Posted by Haider Ali 8 years ago

CBSE > Class 11 > Physics

0 answers

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What is buoyancy force

Posted by Sujeet Yadav 8 years ago

CBSE > Class 11 > Physics

1 answers

Manoj Vashisth Tiwari 8 years ago

When we dip a container in a liquid, our hands feel a force in the vertical direction, that force is perpendicular to the force applied by our hands on the liquid and is called buoyant force.

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Filament of bulb is made by which Metal

Posted by Anmol Dwivedi 8 years ago

CBSE > Class 11 > Physics

1 answers

Amit Singh 8 years ago

Mostly Tungsten, as it has high melting point

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Calculate the velocity with which a body projected from the surface of the moon may escape from its gravitational pull

Posted by Kunal Hivarkar 8 years ago

CBSE > Class 11 > Physics

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Why we have to take is directly proportional to mlg in dimensional analysis

Posted by Shray Sharma 8 years ago

CBSE > Class 11 > Physics

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Two open pipes 80 -81cm long are found to give 26beats in 10sec , when each is sounding with its fundamental frequency. The velocity of sound in air is

Posted by Mahesh M 8 years ago

CBSE > Class 11 > Physics

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What is modulus of elasticity

Posted by Shivam Mishra 8 years ago

CBSE > Class 11 > Physics

1 answers

Rajnandani Verma 8 years ago

The modulus of elasticity of steel is many times higher than that of rubber. By definition, a stiffer material has a higher modulus of elasticity. The modulus of elasticity of a material is a measure of its stiffness. It is equal to the stress applied to it divided by the resulting elastic strain.

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centre of cyclone is dangerously powerful. why

Posted by Dhilna Nv 8 years ago

CBSE > Class 11 > Physics

1 answers

Amit Singh 8 years ago

Centre of cyclone or eye has mostly calm weather. It is rough circular area with diameter of 30 to 40 km. It has lower pressure as compared to outer parts of cyclone. The pressure is 15% less then outer areas. Has pressure is less the speed of wind is more fast then at outer parts. It is also surrounded by thunderstroms too, which is also dangerous.

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Type of elasticity in liquid and gas

Posted by Vinay Wadhwa 8 years ago

CBSE > Class 11 > Physics

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Why All circular motion r called periodic?

Posted by Arud S Karemmanavar Arud 8 years ago

CBSE > Class 11 > Physics

1 answers

Jaat Jaat 8 years ago

Circular motion is where the object travels in a path which is circular -can be a full circle, can be a part of the circle. Periodic motion is where the object repeats its motion after a particular time. Therefore when an object is uniformly moving in a circle and it completes360 degrees, it repeats itself.

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Geostationary satellite

Posted by Atharva Shukla 8 years ago

CBSE > Class 11 > Physics

1 answers

Jaat Jaat 8 years ago

geostationary satellite is an earth-orbiting satellite, placed at an altitude of approximately 35,800 km directly over the equator, that revolves in the same direction the earth rotates (west to east).

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Is it ok to prefer only ncert for science students in 12th

Posted by Stu Dent 8 years ago

CBSE > Class 11 > Physics

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2 necessary condition for a reversible process

Posted by Aleena Zafar 8 years ago

CBSE > Class 11 > Physics

1 answers

Amit Singh 8 years ago

Adiabatic and isothermal processes

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Bernoulli's

Posted by Raja Srivastav 8 years ago

CBSE > Class 11 > Physics

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Antiseptic should have low surface tension. Why

Posted by Abhin Unni 8 years ago

CBSE > Class 11 > Physics

1 answers

Jaat Jaat 8 years ago

Due to lower surface tension the antiseptic can spread easily on body surface.

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Roofs of huts are blown up in a storm. Why

Posted by Abhin Unni 8 years ago

CBSE > Class 11 > Physics

1 answers

Jaat Jaat 8 years ago

Because when storm comes pressure below the roof is higher as compared to top of roof which push the roof upward.

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Determime the volume contraction of a solid copper cube 20cm on an edge when subjected to a hydraulic pressurea of 7.0×10^5 pa.

Posted by Parveen Kaur 8 years ago

CBSE > Class 11 > Physics

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earth is continously pulling moon towards its center . why does not moon fall on the eartg

Posted by Karan Deep 8 years ago

CBSE > Class 11 > Physics

2 answers

Mohammed Mohasin 8 years ago

As moon exerts two types of forces, centrifugal force and centripetal force just like electrons revolve around nucleus of an atom...and also according to newton's third law every action has equal and opposite reaction to counter.. Therefore moon does not fall on the earth.

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Himanshu Sudhakar 8 years ago

Because Earth has greater attracting capacity than moon.

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