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What is a material that loses its resistance to electrical flow at very low temperatures?
A material that loses its resistance to electrical flow at very low temperatures is called a superconductor. This phenomenon is known as superconductivity, where the material exhibits zero electrical resistance below a critical temperature.
What is critical flow in fluids?
Critical flow in fluids refers to the condition where the flow velocity in a fluid reaches the speed of sound. This is the point at which the flow transitions from subsonic to supersonic and is associated with significant changes in flow properties. Critical flow is important in various fluid dynamics applications, such as in nozzles and Venturi tubes.
Is the opposition posed by a material to the flow of current?
Yes, resistance is the opposition posed by a material to the flow of current. It is measured in ohms and is influenced by factors such as material composition, length, and cross-sectional area of the material.
What term describes how easily a fluid can pass through solid material?
You may be thinking of the term permeability, which is used when measuring a porous material's ability to allow fluids to pass through it.Hydraulic conductivity describes the ease with which water will flow through pores and fractures, and is influenced by the permeability of the material.
What controls the flow of current with an electric field?
The flow of current in a material is controlled by its conductivity, which is influenced by the presence of an electric field. When an electric field is applied, it can cause charged particles in the material to move, resulting in the flow of current. The conductivity of the material determines how easily current can flow in response to the electric field.
What is flow stress?
flow stress is yield stress of material during plastic deformation
Do solids like ice flow?
Any material can flow under stress.
What causes plastic flow to occur?
High pressure
What is a material that loses its resistance to electrical flow at very low temperatures?
A material that loses its resistance to electrical flow at very low temperatures is called a superconductor. This phenomenon is known as superconductivity, where the material exhibits zero electrical resistance below a critical temperature.
Critical flow factor?
The critical flow factor is a dimensionless parameter used in fluid mechanics to determine the flow rate of a fluid through a section. It is calculated by dividing the actual flow rate by the theoretical maximum flow rate. The critical flow factor helps in understanding the conditions under which flow becomes critical in pipes and channels.
What is critical flow in fluids?
Critical flow in fluids refers to the condition where the flow velocity in a fluid reaches the speed of sound. This is the point at which the flow transitions from subsonic to supersonic and is associated with significant changes in flow properties. Critical flow is important in various fluid dynamics applications, such as in nozzles and Venturi tubes.
What is critical pressure in nozzle?
Critical pressure in a nozzle is the pressure at which the flow of material through the nozzle reaches its maximum. Beyond which any increase in pressure will not result in an increase in flow. The point at which the velocity of a fluid in the throat of the nozzle reaches the local speed of sound, creating a sonic wave, or a sonic choke.
What flows indefinitely in a superconductor?
A current of electricity can flow at the same strength for an indefinitely long time in a superconductor but only for as long as the superconductor is held below its critical temperature. If its temperature were allowed to rise to its critical temperature - or higher - the material would no longer behave as a superconductor: it would acquire resistivity which would restrict the flow of current.
What is the relation between viscosity and flow ability of a material?
The higher the viscosity, the lower the flow-ability of a material.(Viscosity=internal resistance to flow)
What is critical velocity in fluid flow?
The flow of a liquid remains steady or orderly only so long as its velocity does not exceed a certain limiting value for it, called critical velocity.
What is critical flow and sub critical flow of fluids?
Critical flow is the special case where the froude number (dimensionless) is equal to 1. i.e. The velocity divided by the square root of (gravitational constant multiplied by the depth) =1. Sub critical flow i has a froude number less than 1, and is therefore characterised by slow moving deep water. Supercritical flow is defined as having a froude number greater than 1 and is therefore characterised by shallow fast moving flows.
Any material that can flow is a?
liquid
