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A steel alloy (Su = 150 ksi, Sy = 100 ksi, Sn = 70 ksi) is used to make a five-leaf (each leaf is 0.1 in. * 1.8 in.) semielliptic leaf spring. Kf (which is due to stress con- centration at the clips and the center hole) is 1.2. Use the simplified "triangular plate" model.
(a) What total spring length is needed to give a spring rate of 80 lb/in. (i.e., 80 lb applied at the center causes a 1-in. deflection at the center)?
(b) In service, the spring will carry a static load (applied to the center) of P, plus a superimposed dynamic load that varies from +P to -P. What is the highest value of P that will give infinite life, with a safety factor of 1.5?
Helium gas with a volume of 2.55L , under a pressure of 1.26atm and at a temperature of 44.0?C, How many grams of helium are there? The molar mass of helium is 4.00g/mol
A reservoir has an area of 45000 sq.ft and a uniform thickness of 10 meters. Determine the pore volume of the reservoir
At this output power, how long would it take an 81kg cyclist (including the mass of his bike) to climb the famed 1100-m-high Alpe d'Huez mountain stage? Neglect any friction
Determine the length of time, in s, the force is applied and the amount of energy transfer by work, in kJ.
A ladder is leaning against a vertical wall. Determine the maximum angle with the vertical the ladder can make without falling on the ground
A tetrahedron contains a point charge Q = 65 nC. Find the electric flux through the surface of the tetrahedrom. Find the flux through each face of the tetrahedron
the escape speed starting from the surface of the earth is 11.2 km/s(neglecting any effects of the earth's orbital motion, what would be the escape speed from that planet
A wrench is thrown at a speed of 69 mph at a wall that is 70 ft away. How much force does the wall exert on the wrench and in what direction
q1. light of wavelength 443 nm in air enters a fishbowl filled with water then exits through the crown glass wall of
Three point charges are placed on the x-axis. A charge of +2.0 μC is placed at the origin, -2.0 μC to the right at x = 50 cm, and +4.0 μC at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at ..
What mass of granola, which has a usable energy content of 2,000 cal/g, would be equivalent to the change in gravitational potential energy of a 60.0 kg man who ascends from sea level to the top of Mt. Everest, at elevation 8.848 km? Assume the a..
The angular momentum of the electron as it moves around the center of the circle is 1.40 × 10-25J•s.Find the radius of the circular path.
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