Chapter 19.3, Problem 25R

To determine

To create: a graph of data.

Answer to Problem 25R

The temperature after 5 minute is $21°\text{C}$.

Explanation of Solution

Given:

Initial temperature is $26°\text{C}$ .

Final temperature is $0°\text{C}$ .

Decrease of temperature per minute is $2°\text{C}$ .

Formula used:

The formula for time is given by,

  $t=\frac{\text{difference}\text{in}\text{temperature}}{\text{change}\text{of}\text{temperature}}$.... (1)

Calculation:

Temperature and time are tabulated below:

Time (min)	temperature
0	$26°\text{C}$
2	$24°\text{C}$
4	$22°\text{C}$
6	$20°\text{C}$
8	$18°\text{C}$

The graph is shown below:

From the above graph, at 5 minute, temperature is at $21°\text{C}$.

Conclusion:

Hence, the temperature after 5 minute is $21°\text{C}$.