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The velocity distribution for the flow of crude oil at 100?F (μ=8x10-5 lbf•s/ft2) between two walls is given by u = 100y(0.1 – y) ft/s, where y is measured in feet and the space between the walls is 0.1 ft. Plot the velocity distribution and calculate the shear stress at the walls.
A 29.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 85.0 N and is directed at the angle of 30.0° above the horizontal. Find out the coefficient of kinetic friction.
An 82 kg parachutist descends through a vertical height of 350 m with constant speed. Find out the increase in entropy produced by the parachutist; assume the air temperature is 21 degrees C.
Assume that plane continues to fly with the similar velocity
When the plunger is pushed, contents of the syringe are forced throughout a hollow needle (also of circular cross-If a 4.0 N force is applied to plunger and diameters of the plunger and the needle are 1.20 cm and 2.50 mm, correspondingly, what force ..
After a tornado, a 0.55-g straw was found embedded 2.8 cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was speed of the straw when it hit the tree .
A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for the acceleration of gravity.
A 130 block on a frictionless table is firmly attached to one end of a spring with = 40. The other end of the spring is anchored to the wall. A 21 ball is thrown horizontally toward the block with a speed of 6.6.
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
As the block has raised a vertical height of 0.725, the tension in the cord is 4.66 .What is the velocity of the bullet originally.
The pilot of the spaceship measures the length of the moving ship as 30 meters. Establish its length as measured by a person on earth.
He would like a prescription for contact lenses to serve the similar purpose. What is the correct contact lens prescription, in diopters.
A 73.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the point where the beam is bolted into place .
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