Module 2 Pretest Homework Packet
Answers
Part G Temperature
Conversion 5 points
The general formula
for the conversion of temperatures on scale X to temperatures on scale Y is:
oY
= Y units/ x units ( oX - RPx) + RPy
1.Write the formula
for the conversion of Fahrenheit to Celsius:
oC =
5 C units/ 9 F units [ oC – (-40)]
+ (-40)
or
oC =
5 C units/ 9 F units (oC +40) - 40
2. Write the formula for the conversion
of Kelvin to Celsius:
oC = K - 273
3. convert
-196oC to oF
oF = 9 F units/ 5 C units [ oC + 40)] - 40
oF =
9/5 (-196 + 40) – 40 = 9/5 (-156) – 40 = -
280.5 -40 = -320.5 oF
4. convert
-196oC to K
K = oC + 273
K = oC + 273 = -196 + 273
= 77 K
5. The Rankin scale uses a Fahrenheit
unit, but assumes zero to be absolute zero.
If absolute zero on the Kelvin scale is zero and on Celsius scale is
-273oC, calculate
absolute zero on the Fahrenheit scale, then estimate the Freezing point of
water on the Rankin scale.
(The BP water = 212 oF = 100
oC
= 373K)
oF = 9 Funits/ 5 Cunits [ oC
+ 40)] - 40
oF = 9/5 (-273 + 40) – 40 = 9/5 (-233) – 40 = - 419.4 -40
= -459.4 oF
absolute
zero on Rankin = 0 R equates to -459.6 oF therefore:
oR = 1 Runits/ 1 Funits [ oF
– (-459.4)] + 0
oR = 1 / 1 [ 32oF – (-459.4)] + 0
= 32 + 459.4 = 491.4 oF
Additional Homework (not required) for your practice:
Corwin 7th edition:
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