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4/125 The power unit A of the tractor-scraper has a mass of 4 Mg with mass center at G1. The fully loaded trailer-scraper unit B has a mass of 24 Mg with mass center at G2. Positioning of the scraper is con- trolled by two hydraulic cylinders EF, one on each
4/126 An automatic window-positioning system for a greenhouse is shown in the ?gure. Window OA has a mass of 50 kg with mass center at G. A motor (not shown) drives the gear C, which in turn moves the positioning rack AB. For the window position shown, determine the motor torque M which must be supplied to the pinion C. Neglect the weight of bar AB.
Describe the origin of shot noise in a spectrophotometer.
a raindrop of mass 3.36 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance.
a frictionless piston-cylinder contains argon which is initially at 25 deg. c with a volume of 2.2m3. the system is
Water is pumped from a reservoir to a tank with a lift of 20.0 ft. The suction pipe, which connects the reservoir to the pump, has a 12in diameter and is 25ft long. The discharge pipe, which connects the pump to the tank, has a 10in diameter and is 4..
1. If the x-component of the velocity vector is constant in a plane ?ow, what is true of the y-component of the velocity vector?
The 500-kg uniform beam is subjected to the three external loads shown. Compute the reactions at the support point O. The x-y plane is vertical.
in a carnot cycle heat is supplied at 350degc and rejected at 27degc. the working fluid is water which while receiving
When a mass is attached to the end of the spring and allowed to come to rest,the vertical length of spring is 3.57 m. Calculate the elastic potential energy stored in the spring?
Determine the reliability of a system having a capacity that is lognormal with a median of 100 and s = 0.6 subject to a load that is lognormal with a median of 20 and s = 0.8.
A candy manufacturer produces four types of candy bars in a batch using 2000 g of sugar and 4000 g of chocolate. The sugar and chocolate requirements for each type of bar and the profit margin are given in the table. Determine the number of bars o..
helium is contained in a cylinder and expands frictionlessly against a piston so that pv constant. initially the
determine the expected diffraction angle for the first order reflection from the 310 set of planes for cr when
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