Numerical problem from electrostatics

Numerical problem from electrostatics

A charge of 5 * 10-5c has been distributed between two spheres such that they repeal each other with a force 1N when their centers are 2m apart . Find the charge distribution Asked Rahul Answer Let the total charge be q. If the charge on one sphere is q1 then the charge on the other will be (q-q1) Substitute in Coulomb’s law and get the value of q1 and q-q1

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Space Time Curvature and the TRampoline analogy

Space Time Curvature and the TRampoline analogy

In the trampoline demonstration representing space-time and gravity, it is obviously the friction between the trampoline and the ball that determines the path of the ball. Friction is a physical interaction, so space-time has to physically interact with matter for this demonstration to be a plausible description of what is happening actually. My question is, what is or what causes that physical interaction or “friction” between space-time and matter when space-time is curved?? Thank you Asked Jason Omahne   Answer: The trampoline is just an analogy to understand the phenomenon….

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Calculate momentum

Calculate momentum

What is the momentum of a 2,000kg car traveling with a speed of 25 m/s? Asked Ami Answer Momentum is the product of mass and velocity. Magnitude of momentum may be calculated by multiplying mass and speed. So, the magnitude of momentum of the car = 2000×25=50000 kg m/s

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Conservation of momentum – problem

Conservation of momentum – problem

A ring of radius ‘R’ and mass ‘M’ lies on its side on a frictionless table. A bug of mass ‘m’ rests on the ring. Bug starts walking on the ring with constant speed ‘v’ relative to the ring. Describe the motion of ring relative to ground frame. (In some questions ring being pivoted, but here not, ring is free to move any way horizontally). Thanks. Asked Nitin (The pivoted ring problem is solved here)  

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A Question from Inertia and Motion

A Question from Inertia and Motion

A person is standing on the floor of a train moving with constant speed and continues to do so then if that person jumps for 2-3 seconds then will he land on same spot or behind that spot Asked Parth Mahajan  

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Question from image formation by a plane mirror

Question from image formation by a plane mirror

if a ball is located 4 meters in front of a mirror, what distance separates the object from the image? please Use your diagram to aid your answer. Asked Sumena

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