Question

Kareem heats a beaker of water to a boil. Then he records that the water temperature decreases from 100 degrees Celsius to 19 degrees In 5 2/5 minutes. What was the change in temperature each minute?

Answer 1

It is given that,

The temperature decreases from 100 degrees Celsius to 19 degrees in 5 2/5 minutes.

To find the change in temperature each minute:

Let us take,

`\begin{gathered} T_1=100 \\ T_2=19 \\ t=5(2)/(5) \\ =(27)/(5) \\ =5.4 \end{gathered}`

Using the formula,

`(T_1-T_2)/(t)`

We get,

`\begin{gathered} (100-19)/(5.4)=(81)/(5.4) \\ =15 \end{gathered}`

Hence, the change in temperature each minute is 15 degree celcius per minute.