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

A truck and a car with the same kinetic energy are brought to rest by the application of brakes which provide equal retarding forces. Which of them will come to rest in a shorter distance?

Which of the following examples represent periodic motion?
An arrow released from a bow.

A block of mass 100g slides on a rough horizontal surface. If the speed of the block decreases from 10ms^-1 to 5ms^-1, find the thermal energy developed in the process.

A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been already determined very precisely using a laser as a source of light. A laser light beamed at the Moon takes 2.56s to return after reflection at the Moon’s surface. How much is the radius of the lunar orbit around the Earth?

How will the time period of a simple pendulum change when its length is doubled?

The number of molecules in a container is doubled, what will be the effect on the rms speed of molecules?

Calculate the time required to heat 20kg of water from 10°C to 35°C using an immersion heater rated 1000W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000J kg^-1 K^-1.

At what factor between the two particles gravitational force does not depend?

For an ideal gas, what is the volume and mass of the container? Write the equation of pressure in terms of velocity.