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Tutor profile: Rahul G.

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Rahul G.
Student at BITS Pilani
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Questions

Subject: Physics (Newtonian Mechanics)

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Question:

If we have have to objects one which can slides without friction and one which can roll perfectly, now both of these are allowed to roll/ slide freely on a planked surface from same height . At the bottom which one of them have the more velocity.

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Rahul G.
Answer:

According to the question bth of then are allowed to roll/slip from same height then there initial energy is equal now for the body which rolls down will have rotational plus linear kinetic energy but the one which is sliding have only liner kinetic energy. As we know velocity higher the kinetic energy higher will be the velocity. So as both of then had same initial energy so they will have same final energy so rolling body have less linear kinetic energy as some of its initial energy get converted into rotational kinetic energy. So sliping body have more kinetic energy and velocity

Subject: Physical Chemistry

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Question:

Why does hot water freezes instantly when thrown in air in area where temp is less then 0 while cold water doesn't?

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Rahul G.
Answer:

As we increases the temperature of water the distance between the particle increases or we can say air starts to take the gap between the particles as we throw this water in air the surface area of water increases and it starts freezing immediately while the cold water doesn't have that much surface area so it won't freezes in that short interval.

Subject: Civil Engineering

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Question:

How is number of voids affect the permeability of the soil?

Inactive
Rahul G.
Answer:

As we know number of voids will suggest how much the loose the and makes it easier for water to flow through it and if the connectivity of the voids is good then water will flow more easily.

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