Its wintertime and you are in need of portable electrical heater for your room and you are comparing two different products. The first heater has metal grills made of aluminum and has dimensions of 0.75 [m] x 0.05 [m] x 0.01 [m] while the second heater has metal grills made of iron and has dimensions of 1.00 [m] x 0.03 [m] x 0.01 [m]. You wish to heat your room from 10 degrees Celsius to a nice toasty 28 degrees Celsius and your wall outlet provides 120 [V]. A)What is the resistance of the aluminum and iron heater at 28 degrees Celsius? B)What is the current for the aluminum and iron heater operating at 28 degrees Celsius? C)If you wish to operate your heater for 4 hours and the cost of electricity is $0.12 per kilowatt-hour, which heater has cheaper operational costs?
Viscosity
The measure of the resistance of a fluid to flow is known as viscosity. Most fluids have some resistance to motion, the resistance provided by the fluid is called viscosity. This resistance is created by the force of attraction between the fluid molecules. If you pour water through a funnel, it flows easily and quickly, because it has very little resistance. But if you pour honey through a funnel, it may take a little time longer, as the density of honey is high.
Poiseuille's Law
The law of Poiseuille or Poiseuille's equation states that the pressure drop of an incompressible fluid especially a liquid in a laminar flow that passes through a cylindrical tube of length L, radius r, pressure gradient ΔP, and mainly depends on the viscosity of the fluid is nothing but the pressure difference of the layers of fluids. ΔP=P1-P2
Drag Forces
Forces that occur due to the movement of fluid are known as fluid mechanics. Following are the fluids present:
Its wintertime and you are in need of portable electrical heater for your room and you are comparing two different products. The first heater has metal grills made of aluminum and has dimensions of 0.75 [m] x 0.05 [m] x 0.01 [m] while the second heater has metal grills made of iron and has dimensions of 1.00 [m] x 0.03 [m] x 0.01 [m]. You wish to heat your room from 10 degrees Celsius to a nice toasty 28 degrees Celsius and your wall outlet provides 120 [V].
A)What is the resistance of the aluminum and iron heater at 28 degrees Celsius?
B)What is the current for the aluminum and iron heater operating at 28 degrees Celsius?
C)If you wish to operate your heater for 4 hours and the cost of electricity is $0.12 per kilowatt-hour, which heater has cheaper operational costs?
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