What is viscosity?
Viscosity is a measure of a fluid's resistance to flow. It describes the internal friction of a moving fluid. A fluid with large viscosity resists motion because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its molecular makeup results in very little friction when it is in motion.
Gases also have viscosity, although it is a little harder to notice it in ordinary circumstances.
JN
Related Physics A Level answers
All answers ▸If one proton is travelling through space at 0.3c, what is it's kinetic energy in MeV?
The flow of water in a pipe is turbulent. Define turbulent flow.
Explain why gas bubbles rise faster through magma as they start to expand. (3)
Using Newton's law of universal gravitation, show that T^2 is proportional to r^3 (where T is the orbital period of a planet around a star, and r is the distance between them).