Part A You need to design a 1.4 A fuse that "blows" if the current exceeds 1.4 A. The fuse material in your stockroom melts at a current density of 510 A/cm?. What diameter wire of this material will do the job? Express your answer to two significant figures and include the appropriate units. HA ? D= 6.2 • 10¯2 cm Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Review your calculations and make sure you round to 2 significant figures in the last step. Provide Feedback

Part A You need to design a 1.4 A fuse that "blows" if the current exceeds 1.4 A. The fuse material in your stockroom melts at a current density of 510 A/cm?. What diameter wire of this material will do the job? Express your answer to two significant figures and include the appropriate units. HA ? D= 6.2 • 10¯2 cm Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Review your calculations and make sure you round to 2 significant figures in the last step. Provide Feedback

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Part A A length of aluminum wire is connected to a precision 10.00-V power supply, and a current of 0.4192 A is precisely measured at 23.5 °C. The wire is placed in a new environment of unknown temperature where the measured current is 0.3698 A . The temperature coefficient of resistivity of aluminum is 0.00429 (°C)-1 What is the unknown temperature? Express your answer using three significant figures. να ΑΣφ ? T = °C Submit Request Answer Provide Feedback
The current in a 100 watt lightbulb is 0.790 A. The filament inside the bulb is 0.260 mm in diameter. You may want to review (Pages 750-752). Part A What is the current density in the filament? Express your answer to three significant figures and include the appropriate units. Value Submit HÅ Part B → Units Request Answer P Pearson ? What is the electron current in the filament? Express your answer using three significant figures. IVE ΑΣΦΑ ? electrons second
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A material is formed into a long rod with a square cross-section 0.50 cm on each side. When a 112 VV voltage is applied across a 20-mm length of the rod, a 4.0 AA current is carried. Part A What is the resistivity of the material? Express your answer using two significant figures.
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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
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Probler It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm; the calculation is similar. A person's leg meas-ures 40 cm between the knee and the hip, with an average leg diameter (ignoring bone and other poorly conducting tissue) of 12 cm A potential difference of 0.78 V causes a current of 1.6 mA. Part A What are the fractions of muscle and fat in the leg? Express your answer using two significant figures separated by a comma. fm, ff = 91,9