## Ex: Related Rates – Volume of a Melting Snowball

– A SPHERICAL SNOWBALL IS MELTING IN SUCH A WAY THAT ITS DIAMETER IS DECREASING AT A RATE OF 0.3 CENTIMETERS PER MINUTE, AT WHAT RATE IS THE VOLUME OF THE SNOWBALL DECREASING WHEN THE DIAMETER IS 9 CENTIMETERS? THE FIRST THING WE NEED TO REMEMBER IS THE VOLUME FORMULA FOR A SPHERE IS V=4/3 […]

## Effect of WTC and Cooling rate in welding

So, dear students this the second lecture on the heat flow in welding. In this lecture we will be taking up the effect of the weld thermal cycle on the different metal systems, which are commonly used in for variety of engineering applications. Thereafter, we will take up the cooling rate related things during the […]