question 5 In the Bohr model of hydrogen atom an electron in the have energy sta
ID: 1431220 • Letter: Q
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question 5
In the Bohr model of hydrogen atom an electron in the have energy state moves At speed of 2.19 times 10^6 m/s circular path having a radius of 5.29 times 10^11 m (the -Bohr radius"). What is the effective current associated with this orbiting electron? This a standard problem that happens to be # 3 in your textbook. So many of you are wimps! The maximum charge that our class room Van de Graaff generator could hold on its dome was about 5 muC. Assume that when you get shocked by lit generator, all of the charge passes through you in just one-hundredth of a second (1.00 TIMES 10_2 s) Calculate the associated current tor Retting shocked by the Van de Graaff generator, and express your answer in units of mA Now, let's say you an- feeling bold and opt to lick n 9 V battery. The resistance for wet akin is al>out 2000 ohm Calculate the associated current through your tongue when you place it across the terminals of a 9 V battery, and express your answer in the same unit of mA. A power line carries a current of 1.25 times 10^3 A over a distance of 1.00 times 10^3 km. The line B made of copper and has diameter of 2.00 cm. How long does it take an individual electron to travel the entire length of the power line? Clear! A defibrillator uses a 150 muF capacitor charged to a potential difference of 1000 V. If all the charge on the capacitor B delivered to the capacitor is delivered to the patient during a time interval of 5.0 times 10_2 determine the resistance associated through the patient 'a chest. Clouseau is at it again. This time, he has found a small piece of metal at the' crime scene where the Pink Panther was stolen. The metal is rectangular, with a length of 40C m and square cross section of area equal to 2.50 times 10 _5m^2. He attach the TWO square ends to a 1.5 V and uses an ammeter to measure the resulting current through the metal, finding it to be 3-82times 10^4 A. Based on the implied resistivity, what is the identity that mysterious material? Those cute little flash light frequently are powered by 3 AAA lotteries connected in series so net voltage is 4.5 V. The batter alkaline batteries provide a life time of about 1. 20 Ah. if the net resistance of the bulb assembly in the flashlight is 1.50 times 10^2 ohm, how long can be turned on before requiring now batteries? A Tungsten filament for a light bulb, is found to have a resistance of 0 25 ohm when measured at a temperature of'20 degree C When the light bulb has been on for a substantial period of time, the filament has heated up and the resistance I found to be 3.50 ohm. What is the temperature of the heated filament? Tungsten's temperature coefficient of resistivity is 4.5 times 10^3 per degree C, and not consider thermal expansion of the filament.Explanation / Answer
5.
V = I R
1.5 = 3.82 x 10^4 R
R = 3.9267 x 10^-5 ohm
and resistance, R = resistivity x Length / A
3.9267 x 10^-5 = rho x 0.04 / (2.50 x 10^-5)
rho = 2.454 x 10^-8 ohm m
this is the resistivity of Gold.
so metal was gold.
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