PART - 1 CH - 6 System of Particles and Rotational Motion — Physics STD 11 Science — Question

Which is the most accurate watch?

What are the forces which make any process irreversible?

Is the Kepler's law kinematic?

Explain why does a cyclist bend inwards while riding along a curved road?

Answer the following questions based on the P-T phase diagram of carbon dioxide

1. At what temperature and pressure can the solid, liquid and vapour phases of CO₂ co-exist in equilibrium ?
2. What is the effect of decrease of pressure on the fusion and boiling point of CO₂?
3. What are the critical temperature and pressure for CO₂? What is their significance?
4. Is CO₂ solid, liquid or gas at (a) –70 °C under 1 atm, (b) –60 °C under 10 atm, 15 °C under 56 atm?

A container of area 0.02m² is filled with water. Find the pressure at the bottom of the container if a weight is placed on the piston. (as shown in the figure).

A ball is thrown in horizontal direction from the top of a tower and another ball is dropped from the top of same tower. What will be the time difference between both the balls to reach the earth?

What do you mean by a parking orbit of a satellite?

What are the factors affecting the value of G?

Write the dimensional formula corresponding to :

1. Photon.
2. Calorie.