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In the figure shown, the coefficient of static friction between the 160-lb crate and the floor is 0.35. Calculate the value of the force P and the distance h that will cause the crate to tip and slide simultaneously.
Suppose noise levels of a tape recorder are stated as -55 dB, while another figure is given as -60 dB "A-weighted." Explain the two statements. Why would one specification be preferred over the other?
A heat engine operates between two temperature limits of 1200 K and 300 K. It receives 1 MJ of heat while producing 450 kJ of useful work.
a large pipe carries steam as a two-phase liquid-vapor miture at 1.0 mpa. a small quantity is withdrawn through a
For the pitot-static pressure arrangement of Fig. P6.136, the manometer fluid is (colored) water at 20°C.
Simplify the form of the continuity equation by removing zero terms and show that one of the following statements is valid: ∂u/∂x + ∂v/∂y + ∂w/∂z = 0
A layer of water seperates two smooth surfaces a distance of 2r. Derive an experssion for the force needed to pul the two surfaces apart. Consider the bottom surface fixed. What is the force needed to seperate the top surface?
Compute the response by numerical simulation to see if the constraint is satisfied - If the constraint is not satisfied, find the smallest value of damping that will keep the deflection less than 0.008 m.
consider a 1000-w iron whose base plate is made of 0.5-cm-thick aluminium alloy 2024-t6 p2771 kgm3 and cp 875 jkg c.
If the probe surface has an emissivity of 0.8 and the probe does not receive radiation from other surfaces, as, for example, from the sun, what is its surface temperature?
Determine the polar moment of inertia IP of an isosceles triangle of base b and altitude h with respect to its apex (see Case 5, Appendix D).
The wide-flange beam section shown in the figure has a total height of 250 mm and a constant thickness of 15 mm.Determine the flange width b if it is required that the centroidal moments of inertia Ix and Iy be in the ratio 3 to 1, respectively.
a centrifugal pump with backward-curved blades has the following measured performance when tested with water at 20degcq
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