Q.Let us take a fixed amount of gas in a chamber. So, each molecule of this gas must have the velocity equal to r.m.s. velocity.Whether this is true or false?
A. No, it is not true. Each molecule may have velocity greater, equal or less than R.M.S. velocity of the gas. You will study about it in this concept.
Brownian Motion is due to the unequal bombardment of the suspended particles by the molecules of the surrounding medium. It is the continuous random motion of the partilce of microscopic size suspended in air or liquid.
In this chapter, you have completed:
Few doubts, important facts, points to remember, etc.
More than 100 number of Questions and Examples with Solutions.
In this chapter, firstly you read about the concepts of properties of solids, then moved to concepts of properties of liquid and finally, you read about the concepts of thermal properties of matter and heat transfer and its...
Mechanical energy can be converted into heat. This important physical observation is known as the mechanical equivalent of heat. So, mechanical equivalent of heat states that motion(Work) and heat are mutually interchangeable and that in every case, a given amount of work would generate the same amount of heat, provided the work done is totally converted to heat energy.
it is because, only the top layer of the lake or river freezes. And as we know that the density of ice is lower than the water, so it comes at the top surface. As the thermal conductivity of ice is very less so the heat is not conducted by the lower water (in which fish is living). So it makes fish to survive even in icy water because heat does not flow from water to the atmosphere and the...
Strain is a measurable quantity means it can be measured with the help of some mechanical equipment like Extensometer.
But stress is not measured, it is calculated with the help of strain and the related formula or Law like Hooke's law.
Equation of continuity is based on the principle of conservation of mass.
According to the Continuity Equation, if no fluid is added or removed from the pipe in any length then the mass passing across different sections shall be the same
Because the Buoyant force depends upon the density of the displaced fluid and the density of seawater is more than freshwater.
So the Buoyant force on a fully submerged body is more in seawater than in freshwater.
Mercury is commonly used in barometers because of its high density means the height of the column can be a reasonable size to measure atmospheric pressure. And another reason is that Mercury does not evaporate easily.