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Author Question: The length of a certain wire is doubled while its radius is kept constant. What is the new ... (Read 65 times)

rmenurse

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on: Jul 29, 2018
The length of a certain wire is doubled while its radius is kept constant. What is the new resistance of this wire?
 
  A) It stays the same.
  B) It is 2 times as large.
  C) It is 3 times as large.
  D) It is 4 times as large.
  E) It is 1/2 as large.

Question 2

A lab student drops a 400.0-g piece of metal at 120.0C into a cup containing 450.0 g of water at 15.0C. After waiting for a few minutes, the student measures that the final temperature of the system is 40.0C.
 
  What is the specific heat of the metal, assuming that no significant heat is exchanged with the surroundings or the cup? The specific heat of water is 4186 J/kg  K. A) 1470 J/kg  K
  B) 2830 J/kg  K
  C) 3420 J/kg  K
  D) 3780 J/kg  K
  E) 4280 J/kg  K
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xthemafja

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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rmenurse

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Reply 2 on: Jul 29, 2018
Gracias!

Joy Chen

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Reply 3 on: Yesterday
:D TYSM

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