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Solved: A heater coil connected to a 240-Vrms ac line has

Physics for Scientists & Engineers with Modern Physics | 4th Edition | ISBN: 9780131495081 | Authors: Douglas C. Giancoli ISBN: 9780131495081 132

Solution for problem 25.55 Chapter 25

Physics for Scientists & Engineers with Modern Physics | 4th Edition

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Physics for Scientists & Engineers with Modern Physics | 4th Edition | ISBN: 9780131495081 | Authors: Douglas C. Giancoli

Physics for Scientists & Engineers with Modern Physics | 4th Edition

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Problem 25.55

A heater coil connected to a 240-Vrms ac line has a resistanceof 44 O. (a) What is the average power used? (b) What arethe maximum and minimum values of the instantaneous power?

Step-by-Step Solution:
Step 1 of 3

Lectures 1 2 and 3 Average Speed & Average Velocity vavgdistancetime=dt *speed is a scalar (magnitude with no direction vavgdisplacementtime= rt * velocity is a vector (has direction) → UNITS: ms vavg and r point in direction of motion vx= xf-x0t → xf=x0+t(vx) *with constant velocity  Negative slope = negative velocity  Steeper slope = faster speed Acceleration aavgvt *rate of change of velocity (slowing, speeding, changing direction) aavgv - n+1 n → UNITS: ms 2 → If v and a are point in the same direction, the object is speeding up afree fall0 ms2 → 1 dimensional acceleration down a slope: as= g(sin) Ki

Step 2 of 3

Chapter 25, Problem 25.55 is Solved
Step 3 of 3

Textbook: Physics for Scientists & Engineers with Modern Physics
Edition: 4
Author: Douglas C. Giancoli
ISBN: 9780131495081

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Solved: A heater coil connected to a 240-Vrms ac line has