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A bucket of mass 2.0kg is whirled in a vertical circle of radius 1.1m. At the lowest point of its motion the tension in the rope supporting the bucket is 25N. (a) Find the speed of the bucket (b) How fast must the bucket move at the top of the circle so that the rope does not go slack?
Calculation of percentage heat reduction, Water at 90 C flows through a 50mm bore steel pipe of wall thickness 8 mm. Ambient temperature is 18 C. Calculate the heat loss per metre length of pipe
Roll out a sheet of blu-tack, punch out a disk with your specified radius, assemble a flywheel for testing on an electric drill and determine the approximate critical rotation speed in rpm - SEM212 T1 2014
Determine (a) the velocity of the air at the duct inlet and (b) the temperature of the air at the exit.
the gate in the is hinged at H.the gate is 2 m wide and normal to the palne of the diagram.calculate the force required to hold the gate closed.
A fireclay brick cube, 10 cm in length is removed from a furnace where it was maintained at a temperature of 500 degrees C. The brick cube is then placed in ambient temperature conditions.
locate the initial and final states on a sketch of the T-v digram. determine the mass of vapor present at the initial and final state, each in kg.
The diffusion constant (Do) and activation energy (Q) of C in BCC Fe is 0.01 cm2/sec and 80kJ/mol respectively. In FCC Fe, the values are 0.21 cm2/sec and 148kJ/mol. At exactly 910oC these two phases can co-exist.
Assuming that within metal crystals, the atoms can be considered as hard spheres in contact, sketch arrangement of atoms in a (100) plane, a (110) plane and a (111) plane of face-centered cubic structure. Determine the number of atoms contained wi..
A. When the two torques are applied to the composite shaft, determine: the maximum shear stress magnitude in aluminium tube (1), the rotation angle of joint B and c.
A thin electric heater is wrapped around a rod of diameter 3 cm. The heater dissipates energy uniformly at a rate of 1300 W/m. Air at 20°C flows normal to the rod with a velocity of 15.6 m/s. Determine the steady state surface temperature of the h..
(a) Draw and label a schematic of the system. (b) Determine the mass flow rate (kg/s) of water vapor neededand (c) the rate of exergy destruction (kW)
this is concerned a little more into aerodynamics, what are the uses of wind tunnels including the importance of geometric and dynamic similarity and wind tunnel interference?
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