Mechanical Engineering

Solution Library


Change of Angle of Boat Firing Torpedo

Question A torpedo boat with a displacement of 60 long tons is moving at 18 knots when it fires at 300-lb torpedo horizontally with the launch tube at the 30° angle shown. If the torpedo bas a velocity relative to the boat of 20 ft/sec as it leaves the tube, determine the momentary reduction â ... Read More

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Calculate the Magnitude of Marble Being Thrown at a Horizontal Plane

Question The small marble is projected with a velocity of 3 m/s in a direction 15° from the horizontal y-direction on the smooth inclined plane. Calculate the magnitude v of its velocity after 2 seconds.    Summary The question belongs to Mechanical Engineering and the question is ... Read More

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Questions on Cube Filled with Fluid

Question Given: A cube whose sides are length L. The cube is open at the top (exposed to an atmospheric pressure, PO), but all of the side and bottom faces are solid material. The cube is completely filled with a fluid. There is no motion in the cube.A: Prove that the force exerted on any side face ... Read More

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Questions on Fluid System

Question Given the following fluid system, where both the top and bottom tanks are open to the atmosphere and there are two piping paths from the top to the bottom tank path A and path B, that join at point C prior to discharge into the bottom tank at point D.  ·    Know ... Read More

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Calculate the Pressure of Water at 10°C

Question What is the height, in m, of a column of water at 10°C equivalent to a pressure of two atm? Summary The question belongs to Mechanical Engineering and it deals with water at 10°C with given pressure. The height of the water column has to be calculated. The solution contains the d ... Read More

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Calculate the Pressure of a Column Filled with Ethyl Alcohol

Question What is the pressure, in kPa, at the bottom of a column of ethyl alcohol (density = 785 kg/m3) that is 20m tall?Summary The question belongs to Mechanical Engineering and it deals with ethyl alcohol at given pressure. The pressure at the bottom of the column has to be calculated. The solu ... Read More

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Find the Thermal Conductivity of an Infinitely Long Horizontal Plate

Question A plate of thickness t is subjected to the imposed surface flux q," on its top surface with a pitch of 2L as shown in the figure. The plate is infinitely long in the horizontal direction. The in-depth width of the plate is w. The thermal conductivity of the plate is k. The unheated area on ... Read More

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Calculate the Distance Covered by a Body with Change in Time

Question The following data of the velocity of a body is given as a function of time.  Time (s)              4      7    10     15       Velocity (m/s)     ... Read More

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Calculate the Rate of Flow and Reynolds Number for Oil Flowing in Pipes

Question A process uses an oil of density 800 kg.m-3 and viscosity 80 mPa.s at a rate of 0.72 m3.h-1. The feed pipe splits into two smaller pipes and both discharge freely into the process. One pipe has an inner diameter of 5.0 cm and length of 20 m while the other has an inner diameter of 2.5 cm a ... Read More

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Calculate the Heat Load of a Building with Appliances

Question Calculate the heat load for this building which consists of 3 floors, each floor has 2 apartments, and located at Jeddah city the total volume is 2100 m3 the total area is 700 m2 suppose there are 25 people, 6 computers, 6 refrigerators, 6 ovens, 6 TVs, 42 windows in the building.Summary ... Read More

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Verify and Estimate the Couette Flow and Pressure

Question A steady, full-developed Couette flow in the x-direction (fully-developed means that the velocity does not evolve as a function of distance of x). The velocity profile for the Couette flow is given by v = (ay, 0,0) where a is a constant. All properties have zero gradients in the z-directio ... Read More

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Simplify Continuity and Momentum Equations for a Flowing Compressible Fluid

Question A 1D steady, compressible flow is prescribed by the velocity profile: u = u(x), v = w = 0. The flow is inviscid (negligible viscous forces). Also, you may neglect gravity and other body forces.1.    Simplify the form of the continuity equation by removing zero terms and show ... Read More

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