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Answered on 23 Oct CBSE/Class 11/Science/Physics

Anil Kumar Singh

Teacher

we know that young modulus =Stress/strain and A rigid body is defined as one manifesting zero strain regardless of applied stress so Y=stress/0 Y= infinite (because any number devived by zero is infinite, 1/0= infinite)
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Answered on 06 Oct CBSE/Class 11/Science/Physics

Yashank Singh

Tutor

No, aa for euclidean space, the displacement is always greater than or equal to the distance travelled as goes by it's definition that it is the shortes way possible to reach from point A to point B. And hence in euclidean geometry, turns out to be the straight line or the vector connecting the points... read more

No, aa for euclidean space, the displacement is always greater than or equal to the distance travelled as goes by it's definition that it is the shortes way possible to reach from point A to point B. And hence in euclidean geometry, turns out to be the straight line or the vector connecting the points A and B.

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Answered on 08 Oct CBSE/Class 11/Science/Physics

What is a reason for the falling down of fruits from a tree, when its branches are shaken?

N.s. Private Tutions

When fruits ripen,they tend to loosen the bonding with the branch, when we shake the same, it falls due to gravity pull.
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Answered on 14 Oct CBSE/Class 11/Science/Physics

Express whether the gravitational force is conservative or non-conservative.

Moumita D.

Tutor

A conservative force is a force with the property that the work done in moving a particle between two points is independent of the taken path. A conservative force is dependent only on the position of the object. To put it another way, the work done depends only on the initial and final position of... read more

A conservative force is a force with the property that the work done in moving a particle between two points is independent of the taken path. A conservative force is dependent only on the position of the object.

To put it another way, the work done depends only on the initial and final position of the particle.

Suppose we throw a object of mass ‘m’ upward suppose it goes up to a height h.

then the work done in throwing object in upward direction w1 = -mgh (use ‘-g’ sign convention )

and the work done while returning to the same path w2 = mgh

total work done W = w1 + w2 = -mgh+mgh = 0

Hence, total energy loss will also be zero in this case.Hence the total workdone in travelling a certain height and falling back to tha same place is zero. This is the property of coservative force as the total workdone depends only on the initial and final positions of the objects. So, Gravitational Force is Conservative Force.

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Answered on 05 Oct CBSE/Class 11/Science/Physics

If a boat is floating in a small pond and it carries a large number of big sized stones. If stones are... read more
If a boat is floating in a small pond and it carries a large number of big sized stones. If stones are unloaded into water in the pond, will there be an observable change in level of water in the pond? read less

Abhay

Tutor

No change
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Answered on 20 Oct CBSE/Class 11/Science/Physics

If area (A), velocity (v) and density (p) are the base units, then write the dimensional
formula of force.

Rohit Kumar

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Answered on 12 Oct CBSE/Class 11/Science/Physics

Draw a graph and explain variation of temperture during change of state of water.

Santanu Singha

Concept of physics

Variation of change of state of water with temp. is given in the pic.
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Answered on 29 Sep CBSE/Class 11/Science/Physics

Explain whether it is possible that the brakes of a car are so perfect that the car stops instantaneously. If not, why?

Ashish Kumar Nanda

Tutor

Yes, in ideal conditions but ideal conditions don't exit in real world .
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Answered on 08 Oct CBSE/Class 11/Science/Physics

Saurabh Jain

Tutor

Because these all three are fundamental quantities....All other physical quantities are derived from these quantities
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