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11.1.(Heat)

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Afzal Arbab Mangi

The normal body temperature is 98.4°F. (a) This corresponds to 36.89°C on the Celsius scale. (b) The Fahrenheit and Celsius scales coincide at -40°, as this is the temperature where they have the same value.

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The normal body temperature is (a)What is this temperature on Celsius scale. (b)At what temperature do the Fahrenheit and Celsius scale coincide. Data: T = 98.4 ËšF (a) (b) C = = ? Where the ËšF and ËšC coincide ? Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved 98.4ËšF.
Solution: (a) To determine temperature on Celsius scale we have: __ 5 = ________32 9 By cross multiplication ˚C 9 x = ˚F – 32 ______ x 5 ˚C ˚F= – 32 Putting the values ˚C = ______ x 5 98.4 – 32 x 5 9 Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved 9
ËšC = 332____ 9 ËšC = 36.888 OR ËšC = 36.89 Answer. Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved ËšC = 66.4_____ 9 x 5
(b) At what temperature do the Fahrenheit and Celsius scale coincide. ˚C____ 5 = ˚F _ 32_______ 9 Consider ˚C = T and ˚F = T then : T____ 5 = T _ 32______ 9 by cross multiplication 9T = 5T – 160 Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved
9T – 5T = - 160 4T = -160 T = -160____ 4 T = - 40˚ Answer. At -40˚ Fahrenheit and Celsius scale coincides. Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved

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11.1.(Heat)

  • 1. The normal body temperature is (a)What is this temperature on Celsius scale. (b)At what temperature do the Fahrenheit and Celsius scale coincide. Data: T = 98.4 ËšF (a) (b) C = = ? Where the ËšF and ËšC coincide ? Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved 98.4ËšF.
  • 2. Solution: (a) To determine temperature on Celsius scale we have: __ 5 = ________32 9 By cross multiplication ËšC 9 x = ËšF – 32 ______ x 5 ËšC ËšF= – 32 Putting the values ËšC = ______ x 5 98.4 – 32 x 5 9 Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved 9
  • 3. ËšC = 332____ 9 ËšC = 36.888 OR ËšC = 36.89 Answer. Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved ËšC = 66.4_____ 9 x 5
  • 4. (b) At what temperature do the Fahrenheit and Celsius scale coincide. ËšC____ 5 = ËšF _ 32_______ 9 Consider ËšC = T and ËšF = T then : T____ 5 = T _ 32______ 9 by cross multiplication 9T = 5T – 160 Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved
  • 5. 9T – 5T = - 160 4T = -160 T = -160____ 4 T = - 40Ëš Answer. At -40Ëš Fahrenheit and Celsius scale coincides. Ever Shine Copyright by Arbab Mithal and Afzal Arbab. All Rights Reserved