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A helical compression spring is to be designed for infinite life when subjected to a load that fluctuates between 55 and 110 lb. Steel spring wire having Su = 180 ksi, Sus = 144 ksi, Sy = 170 ksi, Ssy = 99 ksi, and a zero-to-maximum torsional endurance limit of 80 ksi is to be used. (These values are assumed to apply to the size range and surface finish of the spring.) For a value of C = 7, determine the wire diameter theoretically required (safety factor = 1), (a) if presetting is not used and (c) if presetting is used to maximum advantage.
An ideal gas initially at 20°C and 199 kPa has a volume of 3.40 L. It undergoes a quasi-static, Find the heat added to the gas during the expansion
How the system comes to thermal equilibrium
A car of mass 960 travels at a speed of 30 along the straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.88. Take the acceleration due to gravity to be 9.80..
A 10 kg block on a table for which the coefficient of friction is 0.4 is connected to a knot K by a horizontal string. Another block of mass M hangs from point K and the string makes a 30 degree with the horizontal goes upward to a fixed wall. Wha..
An object 6 cm high is placed 30 cm from a concave mirror of focal length 10 cm, Calculate size of image
the space shuttle orbited the earth in a circular orbit with a radius of 200 miles greater than the earths radius.a
A car wheel with a moment of inertia of 7.85 kg.m^2 is accelerating from 2160 rpm to 5040 rpm in a time of 10.0s. calculate The work done in raising the rotation frequency
A block of mass 2.0 kg oscillates on a spring with spring constant k= 5 N/M. what is the period of oscillation is rad/s?, what is the new period of oscillation
A 1.80-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 2.30sin(2?t), Find the resonance angular frequency of the system
A ball with radius r1 and mass m1 is attached by a rod of length L to a second ball with radius r2 and mass m2. Where is the system's center of gravity
two charged particles are located along the x-axis 4uc at the origin 00 and -8uc at the point 2m0.a derive an equation
question a 1100 kg car is moving at a speed of 40.0 ms. a what is kinetic energy of the car? b how much work is
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