Видео

Zenith angle and azimuthal angles are required for the derivation of solid angle. For surface emission Zenith angle varies from 0 to 90 degree Azimuthal angle varies from 0 to 360 degrees For volume emission Zenith angle varies from 0 to 180 degree Azimuthal angle varies from 0 to 360 degrees Solid Angle video link: ruclips.net/video/VmnkkWLwVsc/видео.html

When the dimensions of a object are very large in comparison with the mean free path for collision of phonons or gas molecules, we can perform an energy balance on an “infinitesimal volume".

Dimensional Analysis involves reducing the variables in a governing equation and grouping them in dimensionless form. The most popular and simplest method to generate the nondimensional parameters is the method of repeating variables known as Buckingham Pi theorem, popularized by Edgar Buckingham.

In physical terms, the divergence of a vector field indicates the extent to which the vector field flux behaves like a source or sink at a given point. Mathematically, the divergence is represented by the symbol del.

This video shows the derivation of the formula for solid angle. Solid Angle video link: ruclips.net/video/VmnkkWLwVsc/видео.html

Dry bulb temperature is the surrounding temperature that is measured by a thermometer. Wet bulb temperature is the temperature that is measured by a thermometer by keeping its bulb covered. This temperature tells us whether the surrounding air humid or not. Feels like temperature is that temperature which our body feels due to the combination of surrounding temperature, humidity and wind speed....

Pressure is mathematically written as Force divided area. SI unit of Pressure is Pascal or Newton per meter square. At absolute vacuum, the pressure is 0. The pressure of the atmosphere above absolute vacuum is known as atmospheric pressure. The pressure from absolute vacuum to a pressure above atmospheric pressure is known as absolute pressure. If we subtract atmospheric pressure from absolute...

Boiling occurs when vapor pressure of a liquid is equal to atmospheric pressure. When we apply heat to the cooking vessel, this heat gets transferred to the water molecules close to the bottom due to which the intermolecular bonds between the liquid molecules breaks and they gain high amounts of kinetic energy and covert to gaseous phase. Now since gas molecules move fast, these water molecules...

Siphoning is used to pump a fluid from one place which is at a higher elevation to another without any external equipment. Initially the fluid flows to a higher elevation from the beaker or reservoir containing the fluid and then flows downward. Atmospheric pressure and gravity both are necessary for siphoning to work. Although siphoning also works in vacuum for fluids that have strong cohesive...

In fluid mechanics, it is usually more convenient to work with control volumes, but most of its principles are derived from the time rate of change of extensive properties for systems. The relationship between the time rates of change of an extensive property for a system and for a control volume is expressed by the Reynolds transport theorem (RTT). Chapters: 0:00 System & Control Volume 1:52 D...

Viscosity is a fluid property that represents the internal resistance of a fluid to motion. The viscosity of a fluid is a measure of its “resistance to deformation.” Viscosity is due to the internal frictional force that develops between different layers of fluids as they are forced to move relative to each other. Chapters: 0:00 Example from daily life 0:57 Physics behind viscosity 3:56 Newton'...

Entropy is a fascinating concept used in thermodynamics. Entropy at a microscopic level can be viewed as a measure of molecular disorder or randomness. If you view microscopically any isolated system such as closed box filled with air that appears to be in a state of equilibrium, it may exhibit high number of molecular configurations or randomly changing positions of molecules knowns as microst...

Why ice floats on liquid water? Why volume of water increases on freezing?

Understanding the concept of Solid Angle

WORKING OF A PITOT TUBE

Transport Equation or Conservation Equation

Tensors

Why ink fades away from ATM and Supermarket slips? - Thermal Printer

Understanding Transient Heat Conduction in Semi-Infinite Solid

Difference between Absorption and Adsorption

Understanding Lumped System Analysis in Transient Conduction: Zero Dimensional Heat Transfer

Understanding the working of reflecting telescope

Thermal Radiation: Astronaut Helmet Visor

WHAT IS A BLACK BODY

Understanding Thermal Conductivity in Solids