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What is the pressure change for water that flows through a steel pipe of diameter 0.15 m at a velocity of 2 m/s? If the flow were laminar regime what would be the pressure change? How much energy per mass is required to pump the fluid in turbulent flow? How much per laminar flow? What is the Viscous shear stress of laminar flow? What is turbulent shear stress? If sugar were added to the center flow of the pipe how much faster would the stream mix due to tubulence? What I got so far: P = (f*L*rho*V^2)/2D Re = rho*V*D/u u = 1.002*10^-3 kg/m*s rho = 998.2 kg/ m^3 Re = 2.99*10^5 for friction factor : (1/f^1/2) =-2 log (e/3.7D + 2.51/(Re(f)^1/2)) f = 0.017 P = (0.017)(998.2 kg/m^3)(2 m/s)^2/(0.15*2) = 226 Pa/m This is turbulent flow so I am not sure how to compute laminar regime pressure change. Please help with the rest
A string is wound around a metal wheel that is free to spin on a frictionless pivot. A hanging mass is connected to the other end of the string, What is the initial velocity of the hanging mass
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.620.
A Meteorite Strikes On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, leaving a dent 22 cm deep in the trunk. If the meteorite struck the car with a speed of 130 m/s , what was the magnitude of its deceleration, assuming it t..
At each corner of a cube of 25.41 cm on a side there is a point charge Q = 8.360e-6C. Take V to be zero at infinity, what is the potential at the center of the cube
A passenger train is travelling at 32 m/s when the engineer sees a freight train 384 m ahead of his train travelling in the same direction on the same track. The freight train is moving at a speed of 5.7 m/s.
Calcualte the radiation dosage (in rads) for a 67-kg person that is exposed to 6.0 seconds to a 3.0 Ci source of beta radiation.
A 30 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 14.2 m. What is the time interval between bounces
Two capacitors C1 = 5.6 ?F, C2 = 13.7 ?F are charged individually to V1 = 16.4 V, V2 = 6.1 V. Calculate the final potential difference across the plates of the capacitors once they are connected
The asteroid has a radius of about 9.70 km. Find the acceleration due to gravity at its surface
What is the net upward force on an airplane wing of area 21.9 m2 if the speed of air flow is 293 m/s across the top of the wing and 278 m/s across the bottom
A 4.0-kg object has a velocity of 4.0 m/s headed east. An explosion causes it to break up into two smaller 2.0-kg objects. what is the velocity of the other object after the explosion
1. an atom has 8 protons and 17 nucleons. if it undergoes beta - decay what are the number of protons and neutrons
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