Which friction is grater, statical or dynamical ?
What is the commercial unit of electrical energy ?
A burn from steam is more painful than that from boiling water. Why ?
Explain about Ultraviolet rays?
why the air temperature drops more on clear nights than on cloudy nights?
How is sound produced?
Explain the Archimedes’s Principle ?
Is their any rule in significant figures that maximum number of significant figures in a number are 5
What is white body ?
By primarily using what simple machine did galileo come to the conclusion on the existence of friction?
When water is boiled in a tin and its mouth is closed by a rubber cork, then on pouring cold water over the tin it is crushed. Why ?
What are the characteristics of dead stars?
What is meant by 4th dimension?