# All Questions

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I have confusion related to tension in string. I know that spring force does not changes immediately.But what happened to tension T in string when we cut spring k1.Does it change or remain same.And ...
6 views

### Average speed and Average velocity

Suppose moving from my house to my school through a curved road,it takes suppose 30min and 30m then Average Speed=30m/30min Hence my average speed would be 1m/min then by taking the shortest path ...
3 views

### Two objects undergoing proper acceleration

Is there an inertial frame (x', t') in which two objects undergoing proper acceleration in the positive x-direction (e.g. starting from rest at t=0 from x=0 and x=L) where the two objects end up at ...
11 views

### Does action at distance in electromagnetism violate energy conservation?

Consider two charges A and B separated at distance D. charge B is attached on spring and can move towards and away from charge A. Now charge A is brought closer to charge B and then it is taken back ...
16 views

### Is the age of the universe 13.799±0.021 billion years OR 2.935364e+18 second(s)?

According to wikipedia (https://en.wikipedia.org/wiki/Observable_universe), The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8×10^26 ...