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Masses P and Q are attached by a massless rigid rod to form a dumbbell, as shown in Figure 6.34. The dumbbell is tossed in the presence of gravity so that the masses may spin about the center of mass G. Show that the trajectory of the center of mass is a parabola.
When a material is subjected to a cyclic stress, large cracks grow more slowly than small cracks. The concept of a critical stress for crack propagation is only applicable to brittle materials. Materials will not break if the applied stress is kept b..
A closed rigid tank contains water in equilibrium at a temperature of 225 °C and a quality of 0.35 (35%). The mass of the liquid water present is 0.25 kg. What phases are present in the system? (Give justification) What is the mass of vapor that is p..
Consider a pressure vessel made by welding together two hemispheres of radius 20 ft and wall thickness 1.5 inches. If the allowed normal stress is 90 ksi, calculate the maximum allowed pressure within the spherical vessel.
at an amusement park there are 200kg bumper cars a b and c. that have riders with masses of 40kg 60kg 35kg
a pipe 10 feet long has an outside diameter of 2 inches and a 1 mm thick wall. the yield stress of the wall material is
The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the engine compressor without any work or heat interactions. Calculate the velocity at the exit of a diffuser when air at 100kPa and 14C enters it with a velo..
a 20-cm-long cylindrical graphite pure carbon rod is inserted into an oxidizing atmosphere at 1145 k and 1.013105 pa
A cylindrical barrel has a narrow tube fixed to the top, as shown with dimensions in below figure. The vessel is filled with water to the top of the tube. Calculate the ratio of the hydrostatic force exerted on the bottom of the barrel to the weight ..
by itself the 2500-kg pickup truck executes a 0-100 kmh acceleration run in 10 s along a level road. what would be the
Why don't lawn mowers require a battery? Explain how the spark is generated to ignite the air-fuel mixture. What is the purpose of the carburettor? Explain how it works. How is the Venturi Effect utilized?
Obtain a Fourier series expansion for it.
for certain liquid mu 6 times 10-5 lb.sft2 at 50 degree f and mu 1.5 times 10-5lb.sft2 at 180 degree f. make use of
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