1.2 × 1020 electrons flow through a cross section of a 1.8-mm-diameter iron wire in 4.0 s. Part A What is the electron drift speed? Express your answer in micrometers per second. ▸ View Available Hint(s) ΕΧΕΙ ΑΣΦ VAΣ+ vd=138.95 ? s/uurl You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Provide Feedback
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- In the Bohr model of the hydrogen atom, an electron in the 3rd excited state moves at a speed of 2.43 x 105 m/s in a circular path having a radius of 4.76 x 10-10 m. What is the effective current associated with this orbiting electron? 1.30 X Your response is off by a multiple of ten. mA Submit AnswerThe electron drift speed is 1.9x10-4 m/s in a metal with a mean free time between collisions of 5.6x10-14 s. Part A What is the electric field strength? Express your answer to two significant figures and include the appropriate units. E = μα Value Submit Request Answer Units ?In the Bohr model of the hydrogen atom, an electron in the 4th excited state moves at a speed of 1.37 x 105 m/s in a circular path of radius 8.46 x 1010 m. What is the effective current associated with this orbiting electron? 4.1 Your response is off by a multiple of ten. mA
- Please help.Two 9.0-cm-diameter metal plates 1.2 cm apart are charged to +12.5 nC. They are suddenly connected together by a 0.218-mm-diameter copper wire stretched taut from the center of one plate to the center of the other. Part A What is the maximum current in the wire? Express your answer with the appropriate units. ► View Available Hint(s) Imax = 2.67 10³ A ?Part A The starter motor of a car engine draws a current of 120 A from the battery. The wire to the motor is 5.00 mm in diameter and 1.2 m long. The starter motor runs for 0.770 s until the car engine starts. copper How much charge passes through the starter motor? Express your answer with the appropriate units. 円A <. 190 C. Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Part B How far does an electron travel along the wire while the starter motor is on Express your answer with the appropriate units. HA 0.694 mm Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Tarch
- In an integrated circuit, the current density in a 2.3-um-thick x 75-um-wide gold film is 7.0x105 A/m² Part A How much charge flows through the film in 15 min? Express your answer to two significant figures and include the appropriate units. Q = μA Value Submit Request Answer Units ?A fuel-efficient car is able to convert the chemical potential energy of gasoline into translational kinetic energy at an efficiency of 78.4%. If there is 8742 kJ of chemical potential energy in one tank of gas, what is the amount of translational kinetic energy produced. How to manipulate formula eff=output/input x 100need help on c and e
- Part A An electron moves between two plates and experiences an increase in kinetic energy of 3.8x10-15 J. Calculate AV = VA - VB of the plates. AV = Express your answer with the appropriate units. Value A A Submit Request Answer VA Units ? VB BJ = An electron is moving at a constant speed of 23.7 m/s on a circle of radius 3.89 m. o Express the circumference of the circle in terms of its radius, r. Express the time interval, T, for the electron to finish one circle in terms of the circumference and the speed. Express the current in terms of the fundamental charge, e. Calculate the numerical value, in amperes, of the current. Aanswer sheet in the box on the front table. 1. A metallic conductor is carrying a current. The drift speed of the electrons in the conductor is 2.00 mm/s. The resistivity of the conductor is 2.00 x 10 .m. This conductor has 5.00 x 1028 electrons/m°. What is the magnitude of the electric field in the conductor (in V/m)?