Question

Branch of physics that deals with the study of fluids in motion is called:
A.Dynamics
B.Hydrostatics
C.Hydrodynamics
D.Thermometry

Answer 1

Hint: Hydrodynamics is the study of the motion of water or any other kind of fluids. So this is the branch of physics that deals with the study of any kind of fluid in motion.

Complete answer:
To understand which of the options is correct, let us go through what each of the terms given in the option means-
Dynamics- It is the branch of physics that deals with the study of forces and the effects they have on the motion of bodies. The term dynamics is mostly related to Newton’s second law of motion. A few common examples of study of dynamics involve aerodynamics, thermodynamics, fluid dynamics, etc.
Hydrostatics- This is the specific branch of physics that studies the concept of fluids at rest. It also includes the study of the conditions under which the fluids are at rest or in stable equilibrium and the pressure exerted by a fluid on an immersed body.
Hydrodynamics- hydrodynamics, a part of fluid dynamics, is the branch of physics which includes the study of flow of fluids, which are liquids and gasses. Bernoulli’s equation is significant in the study of hydrodynamics.
Thermometry- It is the process which involves the measuring of temperature, and various calculations regarding the conversion of temperature from one scale to another.

Note:
Hydrodynamics have a huge range of applications for example in calculating forces and moments on an aircraft, in calculating the mass flow rate of petroleum through the pipelines, predicting weather patterns and also in understanding nebulae in interstellar space.