Alternating Current — Physics STD 11 Science — Question

Is Newton's law of motion applicable for material waves? Is this applicable for electromagnetic waves?

A tunning frok produce resonance in a closed tube, but it can't produce resonance in an open tube of the same length. why?

If instead of fresh water, sea water is filled in the tank, would the velocity of water coming out of the hole change?

What is the number of degree of freedom of a bee flying in a room?

Two blocks A and B of mass m_A and m_B respectively are kept in contact on a frictionless table. The experimenter pushes the block A from behind so that the blocks accelerate. If the block A exerts a force F on the block B, what is the force exerted by the experimenter on A?

A ball is moved on a horizontal table with some velocity. The ball stops after moving some distance. Which external force is responsible for the change in the momentum of the ball?

Answer carefully, with reasons:
In an elastic collision of two billiard balls, is the total kinetic energy conserved during the short time of collision of the balls (i.e. when they are in contact)?

The number of significant figures in the numbers 4.8000 × 10⁴ and 48000.50 are respectively:

1. 5 and 6
2. 5 and 7
3. 2 and 7
4. 2 and 6

In a tank filled with fresh water there is a hole in the wall through which water is coming out. If the size of hole becomes little larger, would the velocity of water coming out change? Would the volume of water coming out per second change?

What is the position vector of inst. velocity and inst. acceleration of particle moving in a circular path with a constant speed?