Fahrenheit to Celsius | Celsius to Fahrenheit |
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Example 9.40
Converting temperatures from fahrenheit to celsius.
A recipe calls for the oven to be set to 392 °F. What is the temperature in Celsius?
Use the formula in Table 9.3 to convert from Fahrenheit to Celsius.
C = 5 9 ( F − 32 ) C = 5 9 ( 392 − 32 ) C = 5 9 ( 360 ) C = 200 C = 5 9 ( F − 32 ) C = 5 9 ( 392 − 32 ) C = 5 9 ( 360 ) C = 200
So, 392 °F is equivalent to 200 °C.
Your Turn 9.40
Example 9.41, converting temperatures from celsius to fahrenheit.
On a sunny afternoon in May, the temperature in London was 20 °C. What was the temperature in degrees Fahrenheit?
Use the formula in Table 9.3 to convert from Celsius to Fahrenheit.
F = 9 5 C + 32 F = 9 5 ( 20 ) + 32 F = 36 + 32 F = 68 F = 9 5 C + 32 F = 9 5 ( 20 ) + 32 F = 36 + 32 F = 68
The temperature was 68 °F.
Your Turn 9.41
Example 9.42, comparing temperatures in celsius and fahrenheit.
A manufacturer requires a vaccine to be stored in a refrigerator at temperatures between 36 °F and 46 °F. The refrigerator in the local pharmacy cools to 3 °C. Can the vaccine be stored safely in the pharmacy’s refrigerator?
F = 9 5 C + 32 F = 9 5 ( 3 ) + 32 F = 5.4 + 32 F = 37.4 F = 9 5 C + 32 F = 9 5 ( 3 ) + 32 F = 5.4 + 32 F = 37.4
Then, compare the temperatures.
36 F ° < 37.4 F ° < 46 F ° 36 F ° < 37.4 F ° < 46 F °
Yes. 37.4 °F falls within the acceptable range to store the vaccine, so it can be stored safely in the pharmacy’s refrigerator.
Your Turn 9.42
Reasonable values for temperature.
While knowing the exact temperature is important in most cases, sometimes an approximation will do. When trying to assess the reasonableness of values for temperature, there is a quicker way to convert temperatures for an approximation using mental math. These simpler formulas are listed in Table 9.4.
The formulas used to estimate temperatures from Fahrenheit to Celsius or from Celsius to Fahrenheit are outlined in Table 9.4.
Fahrenheit to Celsius | Celsius to Fahrenheit |
| |
Temperature Conversion Trick
Example 9.43
Using benchmark temperatures to determine reasonable values for temperatures.
Which is the more reasonable value for the temperature of a freezer?
We know that water freezes at 0 °C. So, the more reasonable value for the temperature of a freezer is −5 °C, which is below 0 °C. At temperature of 5 °C is above freezing.
Your Turn 9.43
Example 9.44
Using estimation to determine reasonable values for temperatures.
The average body temperature is generally accepted as 98.6 °F. What is a reasonable value for the average body temperature in degrees Celsius:
- 98.6 °C,
- 64.3 °C, or
- 34.3 °C?
To estimate the average body temperature in degrees Celsius, subtract 30 from the temperature in degrees Fahrenheit, and divide the result by 2.
( 98.6 − 30 ) 2 = 68.6 2 = 34.3 ( 98.6 − 30 ) 2 = 68.6 2 = 34.3
A reasonable value for average body temperature is 34.3 °C.
Your Turn 9.44
Example 9.45
Using conversion to determine reasonable values for temperatures.
Which is a reasonable temperature for storing chocolate:
Use the formula in Table 9.3 to determine the temperature in degrees Fahrenheit.
F = 9 5 C + 32 F = 9 5 ( 28 ) + 32 = 82.4 F = 9 5 ( 18 ) + 32 = 64.4 F = 9 5 ( 2 ) + 32 = 35.6 F = 9 5 C + 32 F = 9 5 ( 28 ) + 32 = 82.4 F = 9 5 ( 18 ) + 32 = 64.4 F = 9 5 ( 2 ) + 32 = 35.6
A temperature of 82.4 °F would be too hot, causing the chocolate to melt. A temperature of 35.6 °F is very close to freezing, which would affect the look and feel of the chocolate. So, a reasonable temperature for storing chocolate is 18 °C, or 64.4 °F.
Your Turn 9.45
Solving Application Problems Involving Temperature
Whether traveling abroad or working in a clinical laboratory, knowing how to solve problems involving temperature is an important skill to have. Many food labels express sizes in both ounces and grams. Most rulers and tape measures are two-sided with one side marked in inches and feet and the other in centimeters and meters. And while many thermometers have both Fahrenheit and Celsius scales, it really isn’t practical to pull out a thermometer when cooking a recipe that uses metric units. Let’s review at few instances where knowing how to fluently use the Celsius scale helps solve problems.
Example 9.46
Using subtraction to solve temperature problems.
The temperature in the refrigerator is 4 °C. The temperature in the freezer is 21 °C lower. What is the temperature in the freezer?
Use subtraction to find the difference.
4 − 21 = − 17 4 − 21 = − 17
So, the temperature in the freezer is −17 °C.
Your Turn 9.46
Example 9.47, using addition to solve temperature problems.
A scientist was using a liquid that was 35 °C. They needed to heat the liquid to raise the temperature by 6 °C. What was the temperature after the scientist heated it?
Use addition to find the new temperature.
35 + 6 = 41 35 + 6 = 41
The temperature of the liquid was 41 °C after the scientist heated it.
Your Turn 9.47
Example 9.48, solving complex temperature problems.
The optimum temperature for a chemical compound to develop its unique properties is 392 °F. When the heating process begins, the temperature of the compound is 20 °C. For safety purposes the compound can only be heated 9 °C every 15 minutes. How long until the compound reaches its optimum temperature?
Step 1: Determine the optimum temperature in degrees Celsius using the formula in Table 9.3.
Step 2: Subtract the starting temperature.
200 C ° − 20 C ° = 180 C ° 200 C ° − 20 C ° = 180 C °
Step 3: Determine the number of 15-minute cycles needed to heat the compound to its optimum temperature.
180 ÷ 9 = 20 180 ÷ 9 = 20
Step 4: Multiply the number of cycles needed by 15 minutes and convert the product to hours and minutes.
15 minutes × 9 = 135 minutes 135 minutes = 2 hours 15 minutes 15 minutes × 9 = 135 minutes 135 minutes = 2 hours 15 minutes
So, it will take 2 hours and 15 minutes for the compound to reach its optimum temperature.
Your Turn 9.48
Learn the Metric System in 5 Minutes
Check Your Understanding
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COMMENTS
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Therefore, first convert them into grams or kilograms and then continue to solve the problem. Here, we converted 3 kg to 3000 g. ... Problem (1): The temperature of a sample of water increases from 20°C to 46.6°C as it absorbs 5650 calories of heat. What is the mass of the sample?
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Temperature Worksheets. Thermometers are tools used to measure how hot or cold something is. The temperature worksheets are sure to provide 1st grade through 8th grade students with adequate practice in reading thermometers, shading them, comparing temperatures, ordering them from the warmest to the coldest and vice versa, converting between ...
So, we want to get to 20 degrees celsius, so we could write 20 is equal to 7.5 times cosine of 2 pi over 365 times the days, plus 21.5 Now, we could subtract 21.5 from both sides and we get -1.5 is equal to- and I'll just copy and paste all of this- is going to be equal to that. So, copy and paste.
Converting Fahrenheit to Celsius Practice Problems It's time to sharpen those temperature conversion skills! For this activity, we'll focus on how to convert temperatures from Fahrenheit to Celsius. Enjoy! Here's the Fahrenheit to Celsius conversion formula for your reference. Problem 1: Convert 77 degrees Fahrenheit to Celsius. Problem 2: Convert - 32.8° F to °C....
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Solving Application Problems Involving Temperature Whether traveling abroad or working in a clinical laboratory, knowing how to solve problems involving temperature is an important skill to have. Many food labels express sizes in both ounces and grams.
This module was designed and written to help you gain an understanding of the concepts and skills needed to solve routine and non-routine problems involving temperature in real-life situations. Have fun and enjoy because you will learn a lot in this module. At the end of this module, you are expected to be able to:
Problem Set GL6: Combined Gas Law. Solve a two-state problem involving pressure, volume, and temperature changes. Includes 6 problems. Problem Set GL7: Ideal Gas Law 1. Use the ideal gas law to relate the pressure volume, temperature and the number of moles. Includes 6 problems. Problem Set GL8: Ideal Gas Law 2.
This video is all about solving routine and non-routine problems involving a temperature in real-life situations.
School subject: Math (1061955) Main content: Temperature Word Problems (1240676)
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In this video you will learn to apply knowledge of temperature in mathematical problems and real-life situations.Its all about Mathematics and gaming videos ...
Download. FERNANDO SAPAD. 934 Views. 3rd - 5th Grade. Mathematics. This lesson helps the students to learn how to solve word problems involving temperature in real-life situations. Learning Objectives Tools.
Hi everyone meron na naman tayong bagong lesson. This is Quarter 4 Grade 5 Math Module 4 Lesson 2: Solve Routine and Non-Routine Problem Involving Temperatur...
the concepts and skills needed to solve routine and non-routine problems involving temperature in real-life situations. Have fun and enjoy because you will learn a lot in this module. At the end of this module, you are expected to be able to: solve routine and non-routine problems involving temperature in real life situations.
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math 5 quarter 4 week 5 || reading and measuring temperature with problem solvingweek 4 - routine and non-routine problems involving volume of a cube and a ...