For spring mass system, Mass (m)= 5 kg Time period (T)= 1.2 sec Horizontal displacement =10 mm=0.01 m Assumption: No friction is present Step 2: calculation of frequency and force required a> www time period = f1 T = 27 1.2 = 27 √ 1/2 m k m 2 TT ں) initial position. T= 1.2 Sec = TS ³X 5 10mm 2 TI 23 = 41- 137 0778 N/m • stiffnen of spring k = +

For spring mass system, Mass (m)= 5 kg Time period (T)= 1.2 sec Horizontal displacement =10 mm=0.01 m Assumption: No friction is present Step 2: calculation of frequency and force required a> www time period = f1 T = 27 1.2 = 27 √ 1/2 m k m 2 TT ں) initial position. T= 1.2 Sec = TS ³X 5 10mm 2 TI 23 = 41- 137 0778 N/m • stiffnen of spring k = +

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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High Voltage Technique For the most puncture-related arrangement of a concentric spherical electrode system with a voltage of 100 kV to be applied between the electrodes and with Ed=80 kV/cm (insulator puncture strength), Emax = 0.6. Ed a) Inner and outer sphere radii, b) Maximum and minimum field strengths, c) Equivalent electrode opening and utilization factor, d) Its capacity (Ɛ0=8,854x10-12 F/m, Ɛr=1) and insulator volume, e) By keeping the outer sphere radius constant, calculate the inner sphere radius value range that can be used in the system without discharge. ANSWERS: a) r1=4.16 cm, r2=8.32 cm b) Emax=48 kV/cm, Emin=12 kV/cm c) α=2.08 cm, η=0.5 d) C=9.257 pF, Vinsulator=2110 cm3 e)1.53<r1<6.8 cm
Consider the head (the distance between the waterfalls) of the Run-of-River Hydro Power Plant is 5 meters, as indicated in Figure 2 . The design used a multi-jet Pelton wheel which has the parameters and operating conditions as below: o Flow rate, p = 4 m3/so Nozzle velocity coefficient, K = 0.98o Wheel diameter, D = 1.47o Mechanical efficiency, fl = 88%1) Calculate the highest possible power output of the turbine. 2)Estimate the electricity generation of the above hydropower plant if the river's water flow rate suddenly drops to half.
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Electrical transmission towers are stationed at 350 m intervals and a conducting cable 2cm in diameter is strung between them. How many wires should each tower carry toensure structural integrity during a tropical storm? The towers are designed to withstandup to 180 kN of transverse force and during a cyclone, wind can blow up to 200 km/h.Assume there is no interference between the wires and take air density as 1.2 kg/m3and viscosity as 1.7×10-5 Nsm-2 . If the smooth insulation on the wires is mechanicallyroughened up before application what effect it will have on the design? Also, establishwhether the wires are likely to be subjected to self-induced vibrations and if so what the frequency would be. The frequency of such forced vibration, sometimes called self-induced vibration, may be calculated from an empirical formula due to Vincent Strouhal: fd⁄Uo = 0.198(1 − 19.7⁄Re) 250 < Re < 105
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Consider the head (the distance between the waterfalls) of the Run-of-River Hydro Power Plant is 5 meters. The design used a multi-jet Pelton wheel which has the parameters and operating conditions as below: o Flow rate, p = 4 m3/so Nozzle velocity coefficient, K = 0.98o Wheel diameter, D = 1.47o Mechanical efficiency, fl = 88%1) Calculate the highest possible power output of the turbine. 2)Estimate the electricity generation of the above hydropower plant if the river's water flow rate suddenly drops to half.