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The bimetallic strip material of Example 8.1 is to be used in an on-off-temperature-control device, which will operate at a nominal temperature of 200?F. Calculate the deflection at the end of a 4-in strip for deviations of ±1 and 2?F from the nominal temperature.
Example 8.1
A bimetallic strip is constructed of strips of yellow brass and Invar bonded together at 30?C. Each has a thickness of 0.3 mm. Calculate the radius of curvature when a 6.0-cm strip is subjected to a temperature of 100?C.
Assuming that the number of days until the next dry day is geometrically distributed, what is the length of consecutive wet days that has a probability of occurence of no more than 0.05
The U.S. Department of Energy (DOE) constructed a Darrieus vertical-axis wind turbine in Sandia, New Mexico. The machine is 60.0-ft tall and 30.0-ft in diameter, and swept an area of 1200 ft 2.
Why did the leg collapse? What effects or details did the designer ignore - Redesign the stillage to avoid similar incidents in future, without increasing its footprint (width, length) since space is needed around it for testing.
The magnetic declination at a certain place is 12 degree 6 minutes W.What is the magnetic bearing there (a) of true north (b) of true south and (c) of true west?
A 2.0-ft^3 object weighing 650 lb is attached to a balloon of negligible weight and released in the ocean (γ = 64 lb/ft^3). The balloon was originally inflated with 5.0 lb of air to a pressure of 20 psi.
A centrifugal water pump has an impeller with r1 = 4", r2 = 12", f1 = 160°, f2 = 170°. The impeller is 2" wide at the inlet end and ¾" at the outlet. For a speed of 1800 rpm, neglecting losses and vane thickness
Compute the design strengths of a rectangular beam with bw=15 in, d = 36 in, d'=2.5 in, fy= 60ksi, fc'=4ksi, and at the top of the beam are 4 #8 bars, the bottom has two rows of 4 #10 beams
A particle has an initial speed of 27m/s. If it experiences a deceleration of (-6t)m/s^2, where t is in seconds, determine its velocity after it has traveled 10 meters. How much time does this take
Chromium contamination is a problem at a number of hazardous-waste sites. At one site local concentrations of chromium reached 60,000 mg chro-mium/kg soil and 19,000 mg/L chromium in the water.
How much money should an environmental soil cleaning company borrow to finance a site reclamation project if it expects revenue of $140,000 in the first year increasing by 3% per year over the 5-year cleanup period? The interest rate is 8%.
Neglect the friction and mass of the small rollers.
A Bonda portable generator is powering a small travelling fridge (120V) in your RV and consumes 125 watts. The efficiency of the generator's gas motor is 23% and the electrical portion (power head) is more efficient at 91%. If white gas weighs 6.073 ..
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