Concrete is pumped from a cement mixer to the place it is being laid, instead of being carried in wheelbarrows. The flow rate is
200 L/min through a 50.0-m-long, 8.00-cm-diameter hose, and the pressure at the pump is
8.00×106N/m2.
(a) Calculate the resistance of the hose. (b) What is the viscosity of the concrete, assuming the flow is laminar? (c) How much power is being supplied, assuming the point of use is at the same level as the pump? You may neglect the power supplied to increase the concrete's velocity.
8.00×106N/m2.
(a) Calculate the resistance of the hose. (b) What is the viscosity of the concrete, assuming the flow is laminar? (c) How much power is being supplied, assuming the point of use is at the same level as the pump? You may neglect the power supplied to increase the concrete's velocity.
1 answer:
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Answer:
the thermal energy generated in the loop =
Explanation:
Given that;
The length of the copper wire L = 0.614 m
Radius of the loop r =
r =
r = 0.0977 m
However , the area of the loop is :
Change in the magnetic field is
Then the induced emf e =
e =
e = 2.74 × 10⁻³ V
resistivity of the copper wire Ω m
diameter of the wire = 1.08 mm
radius of the wire = 0.54 mm = 0.54 × 10⁻³ m
Thus, the resistance of the wire R =
R =
R = 1.13× 10⁻² Ω
Finally, the thermal energy generated in the loop (i.e the power) =
=
=