4. The weather forecaster predicts that today's high will be 70. Which temperature scale is being used? What would be the corresponding temperature on the other two scales?

5. "It was so cold yesterday that the temperature only reached 175." Which temperature scale is being used? What would be the corresponding temperature on the other two scales?



Answer :

### Conversion of 70 Degrees Fahrenheit to Celsius and Kelvin

Let's start with the first part of the question:

Step 1: Identify the given temperature scale.
- The temperature scale given is Fahrenheit.

Step 2: Convert Fahrenheit to Celsius.
- The formula to convert from Fahrenheit to Celsius is:
[tex]\[ \text{Celsius} = (\text{Fahrenheit} - 32) \times \frac{5}{9} \][/tex]
- For a temperature of 70°F:
[tex]\[ \text{Celsius} = (70 - 32) \times \frac{5}{9} \][/tex]
[tex]\[ \text{Celsius} = 38 \times \frac{5}{9} \][/tex]
[tex]\[ \text{Celsius} \approx 21.11^\circ C \][/tex]

Step 3: Convert Fahrenheit to Kelvin.
- The formula to convert from Fahrenheit to Kelvin is:
[tex]\[ \text{Kelvin} = (\text{Fahrenheit} - 32) \times \frac{5}{9} + 273.15 \][/tex]
- For a temperature of 70°F:
[tex]\[ \text{Kelvin} = (70 - 32) \times \frac{5}{9} + 273.15 \][/tex]
[tex]\[ \text{Kelvin} = 38 \times \frac{5}{9} + 273.15 \][/tex]
[tex]\[ \text{Kelvin} \approx 294.26 \, K \][/tex]

Summary:
- The given temperature is 70°F.
- The corresponding temperature in Celsius is approximately 21.11°C.
- The corresponding temperature in Kelvin is approximately 294.26 K.

### Conversion of 175 Degrees Kelvin to Celsius and Fahrenheit

Let's move on to the second part of the question:

Step 1: Identify the given temperature scale.
- The temperature scale given is Kelvin.

Step 2: Convert Kelvin to Celsius.
- The formula to convert from Kelvin to Celsius is:
[tex]\[ \text{Celsius} = \text{Kelvin} - 273.15 \][/tex]
- For a temperature of 175 K:
[tex]\[ \text{Celsius} = 175 - 273.15 \][/tex]
[tex]\[ \text{Celsius} \approx -98.15^\circ C \][/tex]

Step 3: Convert Kelvin to Fahrenheit.
- The formula to convert from Kelvin to Fahrenheit is:
[tex]\[ \text{Fahrenheit} = (\text{Kelvin} - 273.15) \times \frac{9}{5} + 32 \][/tex]
- For a temperature of 175 K:
[tex]\[ \text{Fahrenheit} = (175 - 273.15) \times \frac{9}{5} + 32 \][/tex]
[tex]\[ \text{Fahrenheit} \approx -98.15 \times \frac{9}{5} + 32 \][/tex]
[tex]\[ \text{Fahrenheit} \approx -144.67^\circ F \][/tex]

Summary:
- The given temperature is 175 K.
- The corresponding temperature in Celsius is approximately -98.15°C.
- The corresponding temperature in Fahrenheit is approximately -144.67°F.

In conclusion:
1. The high temperature of 70°F converts to approximately 21.11°C and 294.26 K.
2. The low temperature of 175 K converts to approximately -98.15°C and -144.67°F.