PART - 2 CH - 11 Thermodynamics — Physics STD 11 Science — Question

A simple pendulum of a length l and having a bob of mass M is suspended in a car. The car is moving on a circular track of radius R with a uniform speed v. If the pendulum makes small oscillations in a radial direction about its equilibrium position, what will be its time period?

A tuning fork of frequency 256Hz produces 4 beats per second with a wire of length 25cm vibrating in its fundamental mode. The beat frequency decreases when the length is slightly shortened. What could be the minimum length by which the wire be shortened so that it produces no beats with the tuning fork?

A block is supported by a cord C from a rigid support, and another cord D is attached to the bottom of the block. If you give a sudden jerk to D, it will break. But if you pull on D steadily, C will break. Why?

Give two properties of Carnot's engine as compared to other engines. (Carnot's theorem).

Suppose the acceleration due to gravity at a place is 10m/s². Find its value in cm/(minute)².

Figure. shows a cylindrical tube of cross-sectional area A fitted with two frictionless pistons. The pistons are connected to each other by a metallic wire. Initially, the temperature of the gas is T₀ and its pressure is P, which equals the atmospheric pressure. (a) What is the tension in the wire? (b) What will be the tension if the temperature is increased to 2T₀?

In the Atwood's machine (figure), the system starts from rest. What is the speed and distance moved by each mass at t = 3s?

Water is escaping from a vessel through a horizontal capillary tube 20cm long 0.2mm radius at a point 100cm below the free surface of water in the vessel. Calculate the rate of flow if coefficient of viscosity of water be 1 × 10^-3 Pa-s.

Gas thermometers are more sensitive than mercury thermometers. Why?