Arod loaded in tension with an axial force of p- 1200 n and circular cross-sectional area of a undergoes a nominal stress ofo p/a pia. 1(a)-using a design factor of 3.0 and a material strength of 120 kpa, determine the minimum diameter of a solid circular rod. 1b)-using a proper table, select a preferred diameter and determine the rod's factor of safety 1(c) -the following variations are assumed: the rod's diameter is manufactured within ± 3% ofits nominal dimension, the load is known within± 4% ofthe nominal load, and the material strength is known within 6% of the nominal strength value. if the designer is using nominal values and a stress equation, determine what design factor should be used so that the stress does not exceed the strength. the load application would be considered dynamic (a sudden increase from a zero value) while eccentricity is not considered here. note: the positive and negative values are the maximum and minimum values allowed in the manufacturing, respectively
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Physics, 21.06.2019 21:00
While listening to operatic solos, musicians process the lyrics and the tunes in separate brain areas. this most clearly illustrates the functioning of different
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Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.
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Physics, 22.06.2019 14:30
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Arod loaded in tension with an axial force of p- 1200 n and circular cross-sectional area of a under...
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