Waves — Physics STD 11 Science — Question

Hooke's law literally define ____________

Limiting value of velocity of streamline flow, beyond which flow becomes turbulent is known as ________________.

Elastic behaviour of a body is due to 9. Materials which do not obey Hook's law but can be stretched elastically to large values of strain are called ________.

Dimensional formulae of universal gravitational constant (G) is ______.

A student goes from his house to his friend's house with speed v₁. Finding the door of his friend's closed, returns back to his own house with the speed v₂. Then the average speed of the student is ______.

With increase in temperature, its viscosity of liquid is ____________but viscosity of gases is ____________

The engine of a train passes an electric pole with a velocity u and the last compartment of the train crosses the same pole with a velocity v. Then the velocity with which the mid-point of the train passes the pole is ______.

Fill in the blanks using the word (s) from the list appended with statement:
For a fluid in steady flow, the increases inflow speed at a constriction follows from…… while the decrease of pressure there follows from….....(conservation of mass/ Bernoulli’s principle).

According to ­­_________________ it is impossible to construct self perpetual machine that transfer heat from a body at lower temperature to another at higher temperature.

Relation between pressure P and average kinetic energy E per unit volume of gas is              .