Which of the following assumptions is not considered while arriving at Stoke’s law?
Stoke’s law is valid if there is no slip between the body and the fluid layer is in contact with... View Article
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The minimum pressure require to force the blood of density 1.04 g cm-3 from the heart to the top of the head (vertical distance = 60 cm) is:
According to Bernoulli’s theorem P1– P2 = r g (h2-h1) + ½ r (v22– v12) If v2 = v1, then P1– P2 = r g (h2-h1) ... View Article
A straight or curved path, such that tangent to it at any point gives the direction of flow of liquid at that point is known as
A straight or curved path, such that tangent to it at any point gives the direction of flow of liquid... View Article
Flow of water in hilly area is an example of streamline flow.
Flow of water in hilly area is an example of turbulent flow.
The pressure measured by a gauge is
The pressure measured by a gauge is the difference of actual pressure and the atmospheric pressure.
Which fuel is used in trains?
There are three main types of fuels that have been used in rail transport throughout history. Following are the fuels:... View Article
Evaporation takes place at/in _____. (1) boiling point (2) freezing point (3) between the freezing point and boiling point (4) all temperatures
Answer: (4) all temperatures Evaporation takes place at all temperatures. The air molecules that strike the surface impart some energy... View Article
What is Polarization?
Polarization is defined as the property of electromagnetic radiations where the relationship between the direction and magnitude of the vibrating... View Article
The sum of moments of masses of all the particles in a system about the centre of mass is always:
The sum of moments of masses of all the particles in a system about the centre of mass is always... View Article
Escape velocity does not depend on ________
Escape velocity does not depend on the mass of the body as well as the direction of projection of the... View Article
The viscosity of liquids _________ with increase in temperature.
Answer: The viscosity of liquids decreases with increase in temperature. What is Viscosity? Viscosity is defined as the measure of... View Article
Work done in motion of the body over a closed loop for conservative forces is
Work done in motion of the body over a closed loop for conservative force is zero.
Pressure inside the constricted artery is
The speed of flow of blood through constricted artery is raised which lowers the pressure inside and the artery may... View Article
Venturimeter is a device used to measure the__________
Answer: Venturimeter is a device used to measure the rate of flow of fluid flowing through a pipe. Venturimeter is a... View Article
A force is conservative if
A force is conservative if the work done over a closed path is zero, as it depends only on the... View Article
The rate of flow of liquid through an orifice at the bottom of a tank does not depend on
The rate of flow of liquid through an orifice at the bottom of a tank does not depend on the... View Article
Of the two lubricants A and B for a machine, A has co-efficient of viscocity slightly greater than that of B. Which would you prefer in summer and winter?
In summers, co-efficient of viscocity of liquid decreases with rise in temperature and in winters, co-efficient of viscocity of liquid... View Article
Two light balls are suspended with light strings very close to each other. What happens when we blow air between the balls:
According to Bernoulli’s theorem, when velocity of flow increases, the pressure decreases hence the higher-pressure pushes the balls together.
The dynamic lift due to spinning is called:
The dynamic lift due to spinning is called the Magnus effect. Dynamic lift is defined as the normal force acting... View Article
According to which theorem/principle the sum of pressure head, velocity head and gravity head is constant:
Bernoulli’s theorem states that for the streamline flow of an ideal liquid, the total energy (the sum of the pressure... View Article
