PART - 2 CH - 14 Waves — Physics STD 11 Science — Question

Maximum displacement of the oscillating particle on either side of its mean position is called its              .

The expansion of a gas decreases in an adiabatic process ____________.

If the number of gas molecules is doubled then the values of pressure and kinetic energy_________will change.

Mechanical waves require a mechanical medium to propagate. Properties of medium required for mechanical wave propagation is ________ and _________.

The oscillations in which the amplitude decreases gradually with passage of time are called              .

Reciprocal of bulk modulus of a material is called its ______.

The efficiency of a heat engine cannot be equal to that of a conventional engine.

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).

Fill in the blanks by suitable conversions:
1kg m²s^-2 = ______g cm²s^-2.

Time-displacement graph is a straight line parallel to the time axis. The values of velocity and acceleration will be ................ .