Mechanical Engineering Answers

Two parallel rectangular surfaces 1m ×2m are opposite to each other at

a distance of 4m, The surfaces are black and at 100°C and 200°C.

Calculate the heat exchange by radiation between the two surfaces

explain the importance of using a range of accurate design reference materials when developing design proposals

In a crank and slotted lever quick return mechanism, as shown in Figure, the driving crank length

is 75 mm. The distance between the fixed centers is 200 mm and the length of the slotted lever is

500 mm.

PET has a Young's, Modulus of 3.5 GPa and PLGA 1.2 GPa. A polymer blend is prepared with 45:55 mixture (PET:PlGA) . What is the Young's, Modulus of this blend (use mixture rule). Calculate the percent load borne by PET when the blend is subjected to a load. If after 10 days, entire PET had degraded, what is the Young's Modulus of this blend.

The shaft of a steam turbine produces 600 Nm torque at 50rev/s. Calculate the work transfer rate from the steam

The viscosity of a fluid is to be measured by a viscometer constructed of two 3m long concentric cylinders. the inner diameter of the outer cylinder is 35cm, and the gab between the two cylinders is 0.14m.the outer cylinder is rotated at 250rpm and the torque is measured to be 1.8N determine the viscosity of fluid

The viscosity of a fluid is to be measured by a viscometer constructed of two 3m long concentric cylinders. the inner diameter of the outer cylinder is 35cm, and the gab between the two cylinders is 0.14m.the outer cylinder is rotated at 250rpm and the torque is measured to be 1.8N determine the viscosity of fluid

Polyester has a Young's, Modulus of 3.5 GPa and PLGA 1.2 GPa. A polymer blend is prepared with 45:55 mixture (PET:PlGA) . What is the Young's, Modulus of this blend (use mixture rule)

A 20degC water flows to 50cmx60cm flat plate with velocity of 6.5m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent?

Fluid A with specific enthalphy 2260 kj/kg flows steadily into a mixing tank at a rate of 0.75kg/s.A second fluid B with a specific enthalphy of 160 kj/kgalsoo flows into the tank at steady rate. during mixing heat is lost to the surrounding s at 1260JK/min.If specific enthalphy of the fluid mixture flowing from the tank is 1040KJ/kj. Calculate the rate of flow of fluid B.