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Author Question: Carbon has a negative temperature coefficient of resistance of 0.5 103 (C)-1 . What temperature ... (Read 154 times)

tfester

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on: Jul 28, 2018
Carbon has a negative temperature coefficient of resistance of 0.5  103 (C)-1 . What temperature increase would result in a resistance decrease of 3 for a carbon resistor?
 a. 60C
  c. 20C
  b. 100C
  d. 40C

Question 2

A 15,000-N car on a hydraulic lift rests on a cylinder with a piston of radius 0.20 m. If a connecting cylinder with a piston of 0.050-m radius is driven by compressed air, what force must be applied to this smaller piston in order to lift the car?
 a. 600 N
  c. 3000 N
  b. 940 N
  d. 15,000 N


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mirabriestensky

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Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

B


tfester

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Reply #2 on: Jul 28, 2018
Thank you!


mirabriestensky

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Reply #3 on: Jul 28, 2018
Always glad to help...


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