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QUESTION 1 A 200-m-long aluminum rail is struck by a hammer at one end. How long...
1. Consider a bar under tension. The bar has length L, rectangular cross-section of sides b and h, Young's modulus E, density p, and applied tensile force P. a) If all parameters are fixed except for h, find the value of h that minimizes the mass of the bar under stress, elongation, and stiffness constraints. Assume safety factors oo, Os, and Ok and failure values o*, 8*, and k* b) Also find the minimum mass of the bar m under...
1. The speed of sound in an alcohol at a temperature of 20°C is 1260 m/s. The density of the alcohol at that temperature is 650 kg/m^3. At a temperature of 20°C, find the bulk modulus of the alcohol. 1030 MPa 1080 MPa 1140 MPa 1190 MPa 1240 MPa 2. During a thunderstorm, you hear the sound 4 s after you see the lightning flash. How far did it fall? Assume the temperature outside is approximately 20 1.324 km 1.372...
A) 1.92 diopters B) 2.75 diopters C) 0.4 diopters D) 0.96 diopters E) 5.052632 diopters -80 cm, what would be his prescription's lens power diopters 2. A reaistor is connected what factor does the power dissipated in the circuit change to a battery. If you replace the resistor with one t A) 4 B) 8 C) 2 D) 1/2 E)14 change? 3. Three resiators connected in parallel have individual values ot 4.0, 6.0 and 10.0 G respectively. It this combination...