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In the Hartnell governor shown in Fig. 2.71, the stiffness of the spring is N/m and the weight of each ball is 25 N. The length of the ball arm is 20 cm, and that of the sleeve arm is 12 cm. The distance between the axis of rotation and the pivot of the bell crank lever is 16 cm. The spring is compressed by 1 cm when the ball arm is vertical. Find
(a) the speed of the governor at which the ball arm remains vertical and
(b) the natural frequency of vibration for small displacements about the vertical position of the ball arms.
a round casting is 0. 2 m in diameter and 1 m in length. another casting of the same metal is elliptical in cross
The internal diameter is 0.75 times the outer diameter. If the yield stress is 300 MPa and a safety factor of 1.5 is required, determine the minimum inner and outer diameters required according to the Maximum Shear Stress theory (Tresca).
simple cubic structure assume that a metal exists having a simple cubic crystal structure that is atoms located at the
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assuming that a silver-gold alloy is a random mixture of gold and silver atoms calculate the increase in entropy when
The design of a river model is to be based on Froude number similarity, where the Froude number, Fr = V/(gy)1/2 is a function of the water velocity, V, the water depth, y, and the acceleration of gravity, g. If the river depth is 3 m and the m..
What do you understand by ‘scalability'? Discuss the differences between ‘scaling up' and ‘scaling out' and explain when these different approaches to scalability may be used.
NES/Famicom Super Mario Brothers scaling. Small Mario (figure a) has a height hM = 1.5 m, and while he is underwater runs along the ground with a speed VM = 0.5 m/s. Super Mario (figure b) is twice the height of Small Mario. How fast must Super Mario..
how much does the company have to pay the bond holders?
We wish to design an automatic speed control for an automobile. Assuming that pure integral control (that is, no proportional term) is advantageous; select the feedback gain so that the roots have critical damping (? = 1).
Determine the velocity of the block just after the projectile emerges. How long does the block slide on the rough surface, after the projectile emerges, before it comes to rest again? The coefficient of kinetic friction between the surface and the..
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