Your window thermometer shows that the temperature outdoors is 89.3°f. how should you report this temperature to your friend in israel (i. e., on the celsius scale) and to your si-enthusiastic physicist neighbor (i. e., on the kelvin scale)?

A) Conversion from Fahrenheit to Celsius:
The relationship between the two scales is the following

where
is the temperature in Fahrenheit
is the temperature in Celsius

Re-arranging the formula, we find the inverse relationship:

and we can use this equation to convert  into Celsius:


(b) Conversion to Kelvin scale:
The conversion between Celsius scale and Kelvin scale is easier:

where  is the temperature in Kelvin. Using , we find

An atom that has fewer electrons that protons is called a positive ion.

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