In regions far from the entrance, fluid flow through a circular pipe is one-dimensional, and the velocity profile for the laminar flow is given by u(r) = umax(1 - r 2 / R2), where R is the radius of the pipe, r is the radial distance from the center of the pipe, and umax is the maximum flow velocity, which occurs at the center. Obtain:(a) the relation for the drag force applied by the fluid on a section of the pipe of length L and(b) the value of the drag force for water flow at 20C where R = 0.08 m, L = 15 m, umax= 3m/s, and μ= 0.0010 kg/ms.
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Physics, 22.06.2019 15:20
Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2
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Physics, 22.06.2019 15:20
Your science teacher brings in a speaker to talk to your class about climate change. during the session, students ask a few questions. which questions are related to the current evidence on climate change
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Physics, 22.06.2019 18:30
How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters
Answers: 2
In regions far from the entrance, fluid flow through a circular pipe is one-dimensional, and the vel...
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