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A variable mesh screen produces a linear and axisymmetric velocity profile as indicated in Fig. P5.70 in the airflow through a 2-ft-diameter circular cross-sectional duct. The static pressures upstream and downstream of the screen are 0.2 and 0.15 psi and are uniformly distributed over the flow cross-sectional area. Neglecting the force exerted by the duct wall on the flowing air, calculate the screen drag force.
If the girl has to run 48 m down the hill from where it first was pushed to get to where her sled stopped, find the elapsed time for the journey.
A car starts a race on a circular track and completes the first three laps in a counterclockwise direction in 618 s, Obtain the car average angular velocity for first three laps
A playground is on the flat roof of a city school, 5 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, Find the speed at which the ball was launched
A bowling ball encounters a 0.760-m vertical rise on the way back to the ball rack, as the drawing illustrates. Find the translational speed at the top
A harvest mouse can detect sounds as quiet as -10 . Suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby at the entrance to its nest. How far is the harvest mouse from the leaf
An oil droplet with 15.0 excess electrons is observed between two parallel electrodes spaced 14.0mm apart. What is the radius of the droplet
An asteroid of mass 59,000 kg carrying a negative charge of 12.0 μC is 170 m from a second asteroid of mass 58,000 kg carrying a negative charge of 15.0 μC
q1. a 35.0-kg child swings in a swing supported by two chains each 2.90 m long. the tension in each chain at the lowest
How frequently do extreme precipitation events occur? In other words, is the location frequently subject to large storms? Use the storm data provided to calculate a simple recurrence interval to support your answer. Be sure to explain how you arri..
A steel cable with a total length of 25.6 m and total mass of 95 kg is connected to two poles. Calculate the wavelength of the resulting wave on the cable
A woma stands on a scale in a moving elevator. her mass is 60.0k, and the combined mass of the elevator and the scale is an additional 815kg. starting from rest, the accelerates upward. during the acceleration, the hoisting cable applies a force of 9..
Two charged, parallel, flat conducting surfaces are spacedd=2.00cm apart, What is the initial speed of the electron if it stops just at the second surface
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