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Under certain conditions, wind blowing past a rectangular speed limit sign can cause the sign to oscillate with a frequency ω. (See Fig. P7.19 and Video V9.9.) Assume that ω is a function of the sign width, b, sign height, h, wind velocity, V, air density, ρ, and an elastic constant, k, for the supporting pole. The constant, k, has dimensions of FL. Develop a suitable set of pi terms for this problem.
starting from the general form of the heat equation in cylindrical coordinates for a system write an equation for the
The cord is attached to the pin at C and passes over the two pulleys at A and D. The pulley at A is attached to the smooth collar that travels along the vertical rod. Determine the velocity and acceleration of the end of the cord at B if at the ins..
Thin walled box beam with end load at an angle. A box beam made from an extruded aluminium ally having 5 414 mm wall thickness is loaded by an inclined force P=100 N
Water flows though a 20mm diameter pipe at 3L/min and static pressure of 100mmHG. What is the wall stress of the pipe. The pipe is 1.5mm thick.
a 2 phase liquid-vapor mixture of 2 kg of water is contained in a rigid insulated tank initially with a pressure of 1
a sample of wet silty clay soil has a mass of 126 kg. the following data were obtained from laboratory tests on the
The amplitude of the mass is found to reduce to 10 mm after 100 cycles of vibration. Assuming a spring rate of 200 N/m for the helical spring, find the value of the hysteretis-damping coefficient (h) of the spring
Classify these devices into long-range (up to several meters), intermediate range (up to 1 m), and short-range (up to a fraction of a meter) detection.
a 0.3 kg softball has a velocity of 15 ms at an angle of 35deg below the horizontal just before making contact with the
The catapult is used to launch a ball such that it strikes the wall of the building at the maximum height of its trajectory. If it takes 1.5 s to travel from A to B, determine the velocity vA at which it was launched, the angle of release q, and t..
With this information, Justin calculated the total standard time required to be within the 320 hours available. Is he correct? Calculate the time required and check the accuracy of his calculation.
problem 1heat is being generated uniformly throughout a sphere at volumetric rate 4. the radius of the sphere is r and
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