An Aluminum wire has a ler the wire. Select the correct responsE O 56.2384 milli-ohm O42.6343 milli-ohm 72.0654 milli-ohm 32.3253 milli-ohm
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- The aluminum tube AB of cross section has a fixed support on the base and is supported by a pin at the top of a horizontal beam supporting a load Q = 200 kN. Determine the required thickness t of the tube if its outside diameter for 100 mm and the necessary safety factor in relation to Euler buckling for n = 3.0 (assuming A = 72 GPa). I know the answer, but I cannot understand the critical charge formula. I don't know why to use the constant 2.046 in the formula, can you please show me?PROBLEM 4 For the figure shown, determine the stresses of the wires and the elongation when the temperature change is 45°. Aluminum 800 mm2 Steel 600 mm2 200GPA 11.7 micro m/m°C Area E 70GPA Coefficient of Linear 23 micro m/mC Expansion stel AL zm Im 20 kymA high-density polyethylene [E = 135 ksi and a = 69 x 10-6/°F) block (1) is positioned in a fixture. The block is 2.1 in, by 2.2 in. by 36 in. long. At room temperature, a gap of 0.1 in. exists between the block and the rigid support at B. Assume L₁- 36 in and A = 0.1 in. Determine: (a) the normal stressa in block (1) caused by a temperature increase of 70°F. (b) the normal strain e in block (1) at the increased temperature. Answers: (a) a = (b) = i B 277.05 A LA psi. pc.
- A 1.0 meter long A36 steel rod with a diameter of 40mm is lightly attached at both end of the rod, end A and end B. A collar is located in the center of the rod. The initial temp is 60 degrees C. The final temperature is 35 degrees C. Determine the force that must be applied to the collar so that the reaction at B is zero.Given:Delta T=25 degrees CE for A36 steel: 200 GPaCoeff of thermal expansion: 12(10^-6)/degree CExample 5 118 slug-143 T 0.5 ft 1 ft G 2 ft 0.25 ft 10 PROB 106-107 Can Education All Rights Reserved 1 ft F=ma Muscs=Slug Determine the moment of inertia of the assembly about an axis that is perpendicular to the screen and passes through the center of mass G. The material has a specific - 32.212² weight of y = 90factor of safety is 3
- An annealed copper wire has a resistance of 2.670 at 27°C. Find the resistance at 60°C. Select the correct response: 4 ohms 3 ohms 2.5 ohms O2 ohmsA uniform beam of weight Wis supported by the two rods, the lower ends of which are at the same level just before the beam is supported, as shown in figure. The ratio of the areas Aluminium (E = 70 GPa) 2 m 1.5 m W 3 m 3m Aaluminium Asteel Steel (E = 200 GPa) 0.5 m of the rods so that the beam will be horizontal after it is attached to the rods isA steel measuring tape used by a civil engineer is 50 m long and calibrated at 20oC.The tape measures a distance of 35.694m at 35oC. What is the actual distance measured? D = D L L T ( )( )( ) a Coefficient of linear expansion of steel a = 1.2 x 10-5oC-1
- 3. A certain copper wire has a resistance of 25 ohms at 10°C. Take the temperature coefficient at 10°C to be 0.00409 deg/C. What must be the maximum operating temperature of the wire if its resistance is to increase by at most 20%?The nutural frequancy for the system is equal to Ek rigid uniform bar of mass (m) P b 1 3kb²+PL 2n mL² the Answer is 1 3kb2 –3PL mL²The heater of the automatic defroster in a refrigerator is a resistance wire.The heater uses 110 volts and draws 4.8 amperes of current. Find in ohmsthe resistance.