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Question: Air flows at a velocity of 90 m/s down a 20 cm diameter pipe. The air is at a pressure of 120 kPa and a temperature of 30°C. A valve at the end of the pipe is suddenly closed. This valve is held in place by eight mild steel bolts each with a diameter of 12 mm. Will the bolts hold the valve without yielding? Assume that the pipe is discharging the air to the atmosphere and that the ambient pressure is 101 kPa. It will be necessary to look up the yield strength of the steel to answer this question.
When charges qa, qb, and qc are placed respectively at corners a, b, and c of a right triangle. What is the potential at the midpoint if only the charge qc is removed from the array of charges?
A particle with mass 1.65e-12 kilogram and electric charge -8.22e-8 C moves perpendicularly to a uniform magnetic field of strength 5.45e-3 T. Evaluate the radius of the circular orbit
When ultraviolet light of wavelength 2.54*10-5 cm and intensity 0.5 mW/cm2 form a mercury arc falls upon a clean copper surface, the stopping potential necessary to stop the emission of the photo-electrons is 0.59 V.
What is the potential difference between two parallel plates if a 42.2 μC charge gains 3.7 x 10-4 J of electric potential energy when moved from one plate to the other?
A 30.0kg - goldfinch lands on a slender branch, where it oscillates up and down with simple harmonic motion of amplitude 3.50×10?2m and period 1.60s.b, What is the maximum acceleration of the finch
A 1.70mcylindrical rod of diameter 0.550cmis connected to a power supply that maintains a constant potential difference of 13.0Vacross its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0C) the amm..
A horizontal force of magnitude 31.2 N pushes a block of mass4.42 kg across a floor where the coefficient of kinetic friction is0.631. What is the increase in the kinetic energy of the block
A ball is thrown so that its initial vertical and horizontal components of velocity are 50 m/s and 15 m/s, Estimate the maximum height the ball reaches
A 4.0g mass is attatched to a wire of diameter 0.64mmwith a full stretched of 0.60mm which is 1/5000 of the originallength. Determine the tensile stress and strain
The electric field at the point x = 5.00 cm and y = 0 points in the positive x direction with a magnitude of 5.00 N/C. Find the location of the point charge
You are standing on the ground beside a railroad track. Two posts separated from each other by a distance of 125 m are fastened to the ground. What is the length of the train according to an observer traveling in the train
A pendulum is formed by pivoting a long thin rod about a point on the road. In a series of experiments, the period is measured as a function of the distance x among the pivot point and the rod's center.
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