(a) Compute the vertical deflection of joint D produced by the 30-kip load in Figure P8.13. For all bars, area = 2 in. 2 , and E = 9000 kips/in. 2 . (b) Assume that the truss is not loaded. If bar AE is fabricated 8/5 in. too long, how far to the right must the roller at B be displaced horizontally so that no vertical deflection occurs at joint D?
You might also like to view...
A gas, initially at T=500 K, undergoes a Joule-Thompson (constant enthalpy) expansion from P=10 atm to P=1 atm.
A) Prove that (dT/dP)H is equal to: (1/Cp)[T(dV/dT)P – V] (You may assume this expression is valid for parts B and C, even if you are unable to prove it.) B) Find an expression for (dV/dT)P for this gas, in terms of P, T and known constants, assuming it follows the equation of state: V = (RT/P) + aT2P2 For full credit your answer should be an algebraic equation—all derivatives should be evaluated. C) Assuming the heat capacity of the gas is constant at Cp=5R, and that ‘a’ is constant at 2x10-7 L mol-1K-2atm-2, find the final temperature of the gas.
A(n) ________ is a power tool specially engineered to do one job: drive screws, which it does faster and easier than any other tool.
a. pistol grip drill b. cordless drill c. impact driver d. right-angle drill
Which of the following statements is not correct?
A. The condenser is normally mounted in front of the radiator. B. The receiver/dryer is a storage tank for liquid refrigerant from the condenser. C. The evaporator is in the passenger compartment. D. All answers are correct
Rounded stone should be represented using the _____ pattern from AutoCAD.
A. GRAVEL B. AR-SAND C. BRICK D. BRSTONE