PART - 2 CH - 8 Mechanical Properties of Solids — Physics STD 11 Science — Question

Answer the following: An artificial satellite orbiting the earth in very thin atmosphere loses its energy gradually due to dissipation against atmospheric resistance, however small. Why then does its speed increase progressively as it comes closer and closer to the earth?

What is the phase difference between the displacement and velocity in a S.H.M.?

Commercial unit of power kWh is equal to ­________.

In M.K.S. system, what is the unit of coefficient of viscosity?

Can we define specific heat capacity at constant temperature?

Which of the following is the most precise device for measuring length: a vernier callipers with 20 divisions on the sliding scale.

Relation between phase difference and path difference.

A body of mass 2kg initially at rest moves under the action of an applied horizontal force of 7N on a table with coefficient of kinetic friction = 0.1. Compute the: Work done by the applied force in 10s.

Consider the energy density in a solenoid at its centre and that near its ends. Which of the two is greater?

Why does air bubble in a liquid rise up?