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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.
compute the work the pump must do upon the water
Carbon dioxide initially at 50 kPa, 400 K, undergoes a process in a closed system until its pressure and temperatures are 2 MPa and 800 K, respectively. Assuming ideal gas behavior, find the entropy change of the carbon dioxide (Cp = 1.054 kJ/kg.K)
a dynamics student is called on to investigate a two-car collision. its known that car a struck car b. mass of car a is
Draw a force diagram and obtain a differential equation for ω. This equation is quite simple and can be solved either by inspection or by formal integration.
The block is a cube that is 300mm on each side. Assume the block is incredibly tall. At steady state, what is the velocity of the block?
A liquid/vapor H2O mixture with 9.1 lb-m and a pressure of 1000 psia is heated at constant pressure until the temp is 600ºF. What is the final total enthalpy of the water, in BTUs?
A batch of 20 tons of liquid copper is to be cooled from 2350°F to 2200°F by adding solid copper at 77°F . Assume no heat loss. What quantity of solid copper should be used?
Write code to calculate and plot (on screen) the Fourier Transform magnitude for each of the ten individual digits. Each number is signalled using two simultaneous tones. Note that the sample rate is 8kHz. Make sure your frequency axis is correctl..
a heat engine has a solar collector receiving 600 btuh per square foot inside which a transfer media is heated to 800
a refrigerant at -40degc flows inside a copper pipe inside diameter 3 cm outside diameter 3.4 cm with a convective
a chiller is providing 5 tons of cooling to an air handler by cooling water transfer between the two devices. the
a vertical hydraulic cylinder has a 125-mm diameter piston with hydraulic fluid inside the cylinder and an ambient
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