Comparison with Alternative Expressions

Oct 13, 2025 by miodeya.com 6 views

Introduction

Temperature fluctuations are a common occurrence in our daily lives, and understanding how to calculate changes in temperature is essential for various applications, including weather forecasting, climate modeling, and even cooking. In this article, we will delve into a mathematical problem that involves calculating the change in temperature per hour, given a specific temperature range and time interval.

The Problem

The temperature falls from 0 degrees to $-12 \frac{1}{4}$ degrees in $3 \frac{1}{2}$ hours. We need to find the expression that represents the change in temperature per hour.

Step 1: Convert Mixed Numbers to Improper Fractions

To solve this problem, we first need to convert the mixed numbers to improper fractions. The temperature range is from 0 degrees to $-12 \frac{1}{4}$ degrees, which can be written as:

0 = \frac{0}{1}

-12 \frac{1}{4} = -\frac{49}{4}

The time interval is $3 \frac{1}{2}$ hours, which can be written as:

3 \frac{1}{2} = \frac{7}{2}

Step 2: Calculate the Change in Temperature

Now that we have the temperature range and time interval in improper fractions, we can calculate the change in temperature. The change in temperature is the difference between the final temperature and the initial temperature:

\Delta T = T_f - T_i

\Delta T = -\frac{49}{4} - \frac{0}{1}

\Delta T = -\frac{49}{4}

Step 3: Calculate the Change in Temperature per Hour

To find the change in temperature per hour, we need to divide the change in temperature by the time interval:

\frac{\Delta T}{\Delta t} = \frac{-\frac{49}{4}}{\frac{7}{2}}

\frac{\Delta T}{\Delta t} = -\frac{49}{4} \times \frac{2}{7}

\frac{\Delta T}{\Delta t} = -\frac{49}{14}

\frac{\Delta T}{\Delta t} = -\frac{7}{2}

Conclusion

In conclusion, the expression that finds the change in temperature per hour is $-\frac{7}{2}$ . This result makes sense, as the temperature is decreasing at a constant rate of $-\frac{7}{2}$ degrees per hour.

Comparison with Alternative Expressions

Let's compare our result with the alternative expressions provided:

A. $-\frac{7}{2} + \frac{49}{4}$

B. $-\frac{7}{2} \times \frac{2}{7}$

Expression A is incorrect, as it adds the change in temperature to the time interval, rather than dividing the change in temperature by the time interval. Expression B is also incorrect, as it multiplies the change in temperature by the time interval, rather than dividing the change in temperature by the time interval.

Final Answer

Introduction

In our previous article, we explored the problem of calculating the change in temperature per hour, given a specific temperature range and time interval. We arrived at the expression $-\frac{7}{2}$ as the solution. In this article, we will delve into a Q&A session to clarify any doubts and provide further insights into the problem.

Q: What is the significance of converting mixed numbers to improper fractions?

A: Converting mixed numbers to improper fractions is essential in this problem because it allows us to perform arithmetic operations easily. By converting the mixed numbers to improper fractions, we can simplify the calculations and arrive at the correct solution.

Q: Why do we need to calculate the change in temperature per hour?

A: Calculating the change in temperature per hour is crucial in understanding the rate at which the temperature is changing. This information can be used in various applications, such as weather forecasting, climate modeling, and even cooking.

Q: How do we calculate the change in temperature per hour?

A: To calculate the change in temperature per hour, we need to divide the change in temperature by the time interval. In this problem, we divided the change in temperature ( $-\frac{49}{4}$ ) by the time interval ( $\frac{7}{2}$ ) to arrive at the expression $-\frac{7}{2}$ .

Q: What is the difference between the change in temperature and the change in temperature per hour?

A: The change in temperature is the difference between the final temperature and the initial temperature, whereas the change in temperature per hour is the rate at which the temperature is changing per hour.

Q: Can we use the expression $-\frac{7}{2}$ to calculate the temperature at any given hour?

A: No, the expression $-\frac{7}{2}$ only represents the rate at which the temperature is changing per hour. To calculate the temperature at any given hour, we need to use the initial temperature, the change in temperature, and the time interval.

Q: How can we apply the concept of change in temperature per hour in real-life scenarios?

A: The concept of change in temperature per hour can be applied in various real-life scenarios, such as:

Weather forecasting: By understanding the rate at which the temperature is changing, we can predict the weather patterns and make informed decisions.
Climate modeling: By analyzing the change in temperature per hour, we can understand the impact of climate change and develop strategies to mitigate its effects.
Cooking: By understanding the rate at which the temperature is changing, we can adjust the cooking time and temperature to achieve the desired results.

Q: What are some common mistakes to avoid when calculating the change in temperature per hour?

A: Some common mistakes to avoid when calculating the change in temperature per hour include:

Not converting mixed numbers to improper fractions
Not dividing the change in temperature by the time interval
Not considering the initial temperature and time interval

Conclusion

In conclusion, the concept of change in temperature per hour is a crucial aspect of understanding temperature fluctuations. By applying the expression $-\frac{7}{2}$ , we can calculate the rate at which the temperature is changing per hour. We hope that this Q&A session has provided further insights into the problem and clarified any doubts.