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Derive from first principles the Poiseuille equation for pressure drop generated by the steady flow of a Newtonian fluid through a straight tube of circular cross-section. If the flow is laminar, what is the form of the velocity profile with in the tube? Show that the mean velocity is half the peak in such circumstances.
A room with walls that pass heat at a rate of B(T outside – T inside) is cooled with an air conditioner that has half the efficiency of an ideal Carnot machine. It is powered with a 1-kW electric motor that is 90 percent efficient in converting elect..
Light with some unknown wavelength is incident on a piece of copper. The most energetic electrons emitted from the copper have 2.7eV of kinetic energy. If the copper is replaced by apiece s0odium, what will be the maximum possible kinetic energy K of..
If, on other hand, she first kicks it to player 2, who then kicks it into the net, the ball undergoes two successive displacements, y and x. What are the magnitude and direction of x and y.
A laser used in a holography experiment has an average output power of 4.93 mW. Calculate the energy (in joules) radiated with each pulse
In inertial frame S, a red light and a blue light are separated by a distance ?x = 2.45 km, with the red light at the larger value of x. What is the distance between the two flashes
A charged cloud system produces an electric field in the air near Earth's surface. A particle of charge -1.7 x 10-9 C is acted on by a downward electrostatic force of 3.0 x 10-6 N when placed in this field. What is the gravitational force on the pr..
light of wavelength 5.00 x 102 nm passes through a slit of width 0.210 mm.a find the width of the central maximum on a
Determine how much energy is transported across a 1.35 cm2 area per hour by an EM wave whose E field has an rms strength of 40.0 mV/m
An astronaut is connected to her spacecraft by a 25 meter long tether cord as she and the spacecraft orbit Earth in a circular path at a speed of 3.0 x 10^3 m/s. Find the magnitude of the vertical component of Earth's field at this location
The horse on a carousel is 3.8 meter from the central axis. If the carousel rotates at 9.0×10-2rev/s, Compute how fast is a child on the horse going
the electric field just above the surface of the charged drum of a photocopying machine has a magnitude e of 2.3 times
Find the elastic energy of a cylindrical volume of radius a and length l in which the stress varies directly as the distance from its axis, being zero at the axis and q0 at the outer surface. Justify your answer by commenting on the influence of a ..
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