Formulas in Temperature Conversions
Changing the Subject of a
Formula
Dr Frost
Motivation
The formula to calculate a
temperature in Fahrenheit if we
have the temperature in Celsius:
But what if we had say the
temperature in Fahrenheit, and
wanted to know it in Celsius?
Motivation
If we have some value of F, we
can now more easily substitute it
in to give us a value for C.
C is now the
subject of the formula
.
Learning Objectives
•
Be able to make a term the subject of a
formula, possibly involving brackets, squared
terms and square roots.
‘Solving’ an equation
•
Solving an equation means that we make a
given variable the subject of the formula.
x = ?
Questions
•
STP9A - Page 188
–
Exercise 9D: Q1, 3, 5.
–
Exercise 9E: Odd questions.
Frost Conundrum
At what temperature do we get the same reading
regardless of whether we use Fahrenheit or Celsius?
Recap
•
Make x the subject.
Questions
•
Rayner – page 176
–
Exercise 4
–
Exercise 5
Learn how to change the subject of a formula, solve equations, and tackle temperature conversion challenges between Fahrenheit and Celsius. Dive into exercises and concepts to make terms the subject of a formula with ease.
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Presentation Transcript
Changing the Subject of a Formula Dr Frost
Motivation The formula to calculate a temperature in Fahrenheit if we have the temperature in Celsius: But what if we had say the temperature in Fahrenheit, and wanted to know it in Celsius?
Motivation C is now the subject of the formula. If we have some value of F, we can now more easily substitute it in to give us a value for C.
Learning Objectives Be able to make a term the subject of a formula, possibly involving brackets, squared terms and square roots.
Solving an equation Solving an equation means that we make a given variable the subject of the formula. x = ?
Questions STP9A - Page 188 Exercise 9D: Q1, 3, 5. Exercise 9E: Odd questions.
Frost Conundrum At what temperature do we get the same reading regardless of whether we use Fahrenheit or Celsius?
Recap Make x the subject.
Questions Rayner page 176 Exercise 4 Exercise 5
