Electric Field and Potential — Physics STD 11 Science — Question

From a capillary tube of insufficient length water does not spread outside, why?

For what condition, an object could be considered as a point object? Describe in brief.

A piece of an alloy of mass 96gm is composed of two metals whose specific gravities are 11.4 and 7.4. If the weight of the alloy is 86gm in water, find the mass of each metal in the alloy.

A man stands before a large wall at a distance of 50.0m and claps his hands at regular intervals. Initially, the interval is large. He gradually reduces the interval and fixes it at a value when the echo of a clap merges with the next clap. If he has to clap 10 times during every 3 seconds, find the velocity of sound in air.

The atmospheric temperature in the cities on sea-coast change very little. Explain.

Choose the correct alternative:
If the zero of potential energy is at infinity, the total energy of an orbiting satellite is negative of its kinetic/ potential energy.

Find the average force needed to accelerate a car weighing 500kg from rest to 72km/h in a distance of 25m.

What is the technique used for measuring large time intervals?

What is the law of pressure or Gay- Lussac's law?