Work, Energy, and Power — Physics STD 11 Science — Question

Why do stationary waves not transport energy?

In a simple linear elastic collision, if a particle collides with a particle of same mass then what is the relationship between the velocities of the particles after the collision?

How the gravitational field at a point inside a solid sphere vary with distance x from its centre, if x <R and x > R (R-radius)?

Define second on the basis of vibrations of cesium-133.

A system goes from P to Q by two different paths in the P-V diagram as shown in Fig. Heat given to the system in path 1 is 1000J. The work done by the system along path 1 is more than path 2 by 100J. What is the heat exchanged by the system in path 2?

Figure (a) shows a spring of force constant k clamped rigidly at one end and a mass m attached to its free end. A force F applied at the free end stretches the spring. Figure (b) shows the same spring with both ends free and attached to a mass m at either end. Each end of the spring in Fig. (b) is stretched by the same force F.

What is the maximum extension of the spring in the two cases?

In an elastic collision, relative velocity of approach between two bodies is always ______to relative velocity of separation.

Write Poisson's formula for the rate of fluid flow in a capillary.

A jeweller put a diamond weighing 5.42g in a box weighing 1.2kg. Find the total weight of the box and the diamond to correct number of significant figures.

Water flows through a tube shown in The areas of cross-section at A and B are 1cm² and 0.5cm² respectively. The height difference between A and B is 5cm. If the speed of water at A is 10cm/s find.

1. The speed at B.
   
2. The difference in pressures at A and B.