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- Engineering Mechanics-Statics-First Year- Civil Engineering EXAMPLE 2.3 Determine the required length of cord AC in Fig. (a) so that the 8-kg lamp can be suspended in the position shown. The undeformed length of spring AB is I'A 0.4 m, and the spring has a stiffness of R 300 N/m. 2 m TẠC kAB = 300 N/m 30 TAB W = 78.5 N (b) (a) SOLUTION f the force in spring AB is known, the stretch of the spring can be Dund using F = ks. From the problem geometry, it is then possible toQI A) A resistance of moving coil is 122 the moving coil has 100 turns and is 4em long and 3cm wide the flux density in the air gap is 6×10 wh/m. Find the deflection produced by 300 mV if the spring constant is 25x 10 Nm/degree.IR R. 220 2 c.1 Determine the range of values of Vi that will maintain the Zener diode in the "on" state. Refer to the figure in the right. Vz = 20 V IZM = 60 mA RL 1.2 k2 V %3D
- Using Moment area method, calculate the horizontal deflection of Joint D in the structure shown in Figure for Question 2 (a) below. I = 1290×106 mm².An Aluminum wire has a length of 200 m and a diameter of 10 mm. Find its resistance of the wire. Select the correct response. O 56.2384 milli-ohm 42.6343 milli-ohm O 72.0654 milli-ohm 32.3253 milli-ohmDetermine the resistance and conductance of 20m 20m of copper wire 2mm in diameter. P=1-72x10²
- Suppose there is a RLC circuit connected across an AC source. How does increasing the resistance affect the resonant frequency of the circuit? Increasing the resistance decreases the resonant frequency Increasing the resistance has no effect on the resonant frequency Increasing the resistance increases the resonant frequency10. What is the maximum elongation of a helical spring which is made of phosphor bronze composed of 20 turns of 20 mm diameter wire with a mean radius of 80 mm when the spring is stressed to 140 MPa, for which G = 42 GPa? a. 226 mm b. 242 mm c. 235 mm d. 250 mmFor the following equilibrium system, assuming all strings are ideal. If the mass M = 50, and the angles B and 0 are 50 ° and 30, respectively. What is the value of the magrnitude of the voltage T4? a) T = 762.3042 N b) T = 980 N c) T, = 565.8035 N d) T=639.6499 N
- A simply supported beam is shown in Figure Q2 (a). Determine the slope at point A and the deflection at mid-span of the beam by using the Macaulay's method. Take E= 200 GPa and I= 120×10“ m*A metallic cube of 30 cm side and weighing 500 N is lowered into a tank containing two fluid layers of water and mercury. Top edge of the cube is at water surface. Determine the position of block, at Water-Mercury interface when it has reached equilibrium. (30-1) Water Interface MercuryProb 3 • A 50 m tape was standardized and was found to be 0.0042m too long than the standard length at an observed temperature of 58 °C and a pull of 15kg. If the same tape was used to measure a certain distance and was recorded to be 673.92m long at an observed temperature of 68 °C and a pull of 15kg, and the coefficient of thermal expansion is 0.0000116/ °C, determine the following: 1. Standard Temperature 2. Total correction 3. True length of the line.