PART - 2 CH - 9 Mechanical Properties of Fluids — Physics STD 11 Science — Question

Person sitting in a moving bus in uniform motion fall forward when sudden break is applied. It is due to ________.

Why should the difference between the frequencies be less than ten to produce beats?

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?

A planet revolves around a massive star in a highly elliptical orbit. Is its angular momentum conserved over the entire orbit?

A particle executes simple harmonic motion. Let P be a point near the mean position and Q be a point near an extreme. The speed of the particle at P is larger than the speed at Q. Still the particle crosses P and Q equal number of times in a given time interval. Does it make you unhappy?

One flask contains glycerine and the other flask contains water. Both are spun rapidly and placed on the table. The liquid in which flask will come to rest first and why?

Which curve has the steepest slope of the P-V diagrams for isothermal and antithermal processes?

Give two uses of polar satellites.

It is true that the triple-point in a singular point of matter, uses modern thermodynamics. How?

At the same temperature and pressure, the densities of two diatomic gases are d, and d. What is the ratio of the speeds of sound in these gases?