can you help me in number 5? 2. A 1.5-m wire measuring 1.5 m3 has a resistance of 0.955-µ0 at 20 °C. Calculatethe resistance of the wire at 20 °C if the length is changed to 150-m and its areato 450-cm?.3. A 1-km cable consists of 12 identical strands of aluminum, each 3mm indiameter. What is the resistance of the cable? (Hint: the 12 strands resemble 12resistances in parallel, each resistance being the resistance of each strand).4. A conductor has a resistance of 7-0 at 0°C. At 20 °C, its temperature coefficientis 0.00333. Find its resistance at 10 °C.5. An electric heater takes 23.889 kcal in 20 minutes at 200 V. What is the currentdrawn by the heater? (Hint: 4.186 J = 1 cal)6. How many electrons pass in a given point in 40 seconds in a conductor carrying10 Amperes?

Time=20 minutes Energy=23889 Cal

Answered: 5. An electric heater takes 23.889 kcal…

5. An electric heater takes 23.889 kcal in 20 minutes at 200 V. What is the current drawn by the heater? (Hint: 4.186 J = 1 cal)

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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Concept explainers

Scalars and Vectors

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Question

can you help me in number 5?

2. A 1.5-m wire measuring 1.5 m3 has a resistance of 0.955-µ0 at 20 °C. Calculate
the resistance of the wire at 20 °C if the length is changed to 150-m and its area
to 450-cm?.
3. A 1-km cable consists of 12 identical strands of aluminum, each 3mm in
diameter. What is the resistance of the cable? (Hint: the 12 strands resemble 12
resistances in parallel, each resistance being the resistance of each strand).
4. A conductor has a resistance of 7-0 at 0°C. At 20 °C, its temperature coefficient
is 0.00333. Find its resistance at 10 °C.
5. An electric heater takes 23.889 kcal in 20 minutes at 200 V. What is the current
drawn by the heater? (Hint: 4.186 J = 1 cal)
6. How many electrons pass in a given point in 40 seconds in a conductor carrying
10 Amperes?

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