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Harshit Maurya 7 years, 2 months ago

(kx²)/2

ANSWER

Define different type of stress and strain.

Posted by Bhupendra Soni 5 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Rishita Shishir ?✏ 7 years, 2 months ago

a. Longitudinal stress and strain b. Normal stress and strain c. Shearing stress and strain

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Theory Weightage required to pass in kvs 11th Mau

Posted by Shubham Sharma 5 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

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Sir what is radius of gyration?

Posted by Raju Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 7 years, 2 months ago

The formula of moment inertia in terms of the radius of gyration is given as follows:

I = mk2 (1)

where I is the moment of inertia and m is the mass of the body

Accordingly, the radius of gyration is given as follows

k=√I/m (2)

The unit of radius of gyration is mm. By knowing the radius of gyration, one can find the moment of inertia of any complex body equation (1) without any hassle.

Consider a body having n number of particles each having a mass of m. Let the perpendicular distance from the axis of rotation be given by r1, r2, r3,…,rn. We know that the moment of inertia in terms of radius of gyration is given by the equation (1). Substituting the values in the equation, we get the moment of inertia of the body as follows

………… (3)

If all the particles have the same mass then equation (3) becomes

We can write mn as M which signifies the total mass of the body. Now the equation becomes

………… (4)

From equation (4), we get

From the above equation, we can infer that the radius of gyration can also be defined as the root mean square distance of various particle of the body from the axis of rotation.

ANSWER

Show that the time period of a planet is proportional to the 3/2 power of the radius of its orbit.

Posted by Abhinav Bhardwaj 7 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Limitations of first law of thermodynamics ???? ??

Posted by Aaditya Rathore??? 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Aaditya Rathore??? 7 years, 2 months ago

Thanks Ayushi

3Thank You

Ayushi Ayushi 7 years, 2 months ago

The limitations of the first law of thermodynamics are: (i) There is no indication available as regards the direction in which the change takes place. (¡¡) first law of thermodynamics does not provide a clear idea about the direction of absorption or evolution of heat. (iii) It does not give any idea about the extent to which the change takes place.

ANSWER

What is resonance ? What do solders go out of step while crossing a bridge

Posted by Ravi Yadav 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Veena Singh☺️? 7 years, 2 months ago

The phenomenon in which two or more structures can be written fir a compoundb, but none of them represents it accurately, is reffered to aa resonance. More the resonating structure, more the stability of compound

ANSWER

Pressure of an ideal gas? plz give ans fast

Posted by Preet Radadiya 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Mayank Singh 7 years, 2 months ago

1 atm

😜Arnav Arya🙃 7 years, 2 months ago

1 atm??

5Thank You

ANSWER

If both apple and earth attract each other with the same force why does Apple fall on earth and not earth in the apple ?

Posted by Rahul Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Tushar Aggarwal 7 years, 2 months ago

Yes,the force is there from body side. But that is negligible and not same to gravitational force. A Fact.... If all the creatures on the earth jump above at a single time then the earth can be displaced from its position by 1 cm above.

😜Arnav Arya🙃 7 years, 2 months ago

There is an error in the question apple and earth both can't attract each other with same force only Earth attract anything which is on its surface.

ANSWER

Water rises in a capillary tube but mercury falls in the same tube. Why?

Posted by Ayu Sharma 7 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Yuvraj Yadav 7 years, 2 months ago

Also height is inversely proportional to density and mercury is denser than water

Yuvraj Yadav 7 years, 2 months ago

Because of large cohesive force of mercury which is greater than adhesive force between mercury and tube,

😜Arnav Arya🙃 7 years, 2 months ago

Due to the heavy weight of Mercury and it is more viscous than Water

ANSWER

A man can swim with a speed of 4.0km/h in still water. How long does he take to cross a river 1.0km wide if the river flows steadily at 3.0km/h and he makes his strokes normal to the river current? How far down the river does he go when he reaches the other bank?

Posted by Rishita Shishir ?✏ 7 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Relationship between poise and decapoise

Posted by 😜Arnav Arya🙃 7 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Veena Singh☺️? 7 years, 2 months ago

1 decapoise = 10 poise

Aaditya Rathore??? 7 years, 2 months ago

1Decapoise=10 poise

Anmol Singh 7 years, 2 months ago

1Decapoise =10 poise

ANSWER

What is r.m.s. in kinetic theory of gases????

Posted by Jahnvi Singh 7 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Akanksha Kumari? 7 years, 2 months ago

Root mean square velocity

Faizan Ayyub 7 years, 2 months ago

Root 3RT/M

Soummyadip Roy 7 years, 2 months ago

√sq of observation / total no.

ANSWER

Dimension formula of frequency??

Posted by Aman Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Priya Dharshini ? 7 years, 2 months ago

F= 1/t hence dimensional formula is T^-1

Jahnvi Singh 7 years, 2 months ago

Dimension formula for frequency is T ^-1

ANSWER

Magnitude of force is equal to the magnitude of mass when the acceleration is equal to???????

Posted by Anand Mutnale Mutnale 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Jahnvi Singh 7 years, 2 months ago

As we know F= MA, if M=F then then F/M=A and A is 1 ms^-2.....

ANSWER

A geyser heats water flowing at a rate of 3.0 litres per minute from 27°c to 77°c. If the geyser operateson a gas burner. What is the rate of consumption of the fuel ifits heat of combustion is 4.0×10^4 j/g!?

Posted by Yashas Bm 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

?????Geetanjali???? ? 7 years, 2 months ago

Volume of water heated = 3.0 litre min^-1 Mass of water heated = 3000 g min^-1 Rise in temperature, deltaT = 77-27= 50'C Specific heat of water, c= 4.2 Jg^-1 Heat absorbed by water, Q= mc deltaT = 3000×4.2×50 = 63×10^4 J min^-1 Heat of combustion = 4.0×10^4 Jg^-1 Rate of combustion of fuel = 63×10^4 J min^-1/4.0×10^4 J g^-1 = 15.75 g min^-1 .

3Thank You

ANSWER

Derive Newton's law of gravitation from Kepler's third law of planetary motion

Posted by Madhav Chib 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Hi Bju 7 years, 2 months ago

F=mv^2/r But orbital vel is v=circumference/time=2πr/T By putting value of v in first eqn we get F=m/r*(2πr/T)^2=4π^2mr/T^2 Now by putting Kepler's law T^2=kr^3in above eqn we get F=4π^2mr/kr^3 As the force b/w the sun and the planets is mutual,it should also be proportional to the mass M of the sun. 4π^2/k is proportional to M so, 4π^2/k=GM So F=GMm/r^2

ANSWER

Does the work done is moving a body depend upon how fast a body move

Posted by Rajeev Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Yakshi Baliyan 7 years, 2 months ago

Nope work done does not depend on velocity( means how fast is obj moving) ......it depends upon change in velocity i.e. acceleration ......because work done= F×d.....and F= m×a .....therefore if acceleration will inc. then F will inc. similarly W will inc.....hope its clear .....well ye mere papa ka name h???

ANSWER

How much work is done by mass m moving once around the horizontal circle of radius

Posted by Rajeev Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Ravi Raj 7 years, 2 months ago

So multiply it as Work done - force × displacement

Ravi Raj 7 years, 2 months ago

Perimeter of circle - distance and force - MA

ANSWER

one end of uniform wire of length l and of W is attached rigidly to a point in the roof and a weight pw is suspended from its lower end. If S is area of cross-section of wire ,find the stress the wire of height 3l/4from its lower end.

Posted by Rohan Ajudia 7 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Relation between "g" & "G" factors influencing "g" escape velocity

Posted by Narottam Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What do you mean by conservative force ? Give an example for conservative force.

Posted by Anuj Rohan 7 years, 2 months ago

CBSE > Class 11 > Physics

2 answers

Vinay Gautam 7 years, 2 months ago

It depends on the initial and the final positions. It doesnt deprnds on the path followed by the object

3Thank You

Lavanya ❤️? 7 years, 2 months ago

A conservative force is a force with the property that the total work done in moving a particle between two points is independent of the taken path. Example :-the force of gravity and the spring force are conservative forces

ANSWER

A aeroplane takes off at an angle of 30 degree to the horizontal is 250km/hr.what is the actual velocity? Also find the vertical component of the velocity

Posted by Anuj Rohan 7 years, 2 months ago

CBSE > Class 11 > Physics

1 answers

Lavanya ❤️? 7 years, 2 months ago

Let the velocity of the plane be V horizontal component of velocity = V cos 30°= 200 v x √3/2 = 200 v = 400/√3 =231 km/hr vertical component of velocity is V sin 30 = v/2=115.47 km/h