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Understanding Celsius and Fahrenheit Scales Video Lecture | Science Class 7 (Old NCERT)
FAQs on Understanding Celsius and Fahrenheit Scales Video Lecture - Science Class 7 (Old NCERT)
| 1. What is the difference between Celsius and Fahrenheit scales? |  |
Ans.The Celsius scale is based on the freezing point of water at 0 degrees and the boiling point at 100 degrees, while the Fahrenheit scale sets the freezing point at 32 degrees and the boiling point at 212 degrees. This means that the two scales use different reference points and increments, leading to different temperature readings for the same physical temperature.
| 2. How do you convert Celsius to Fahrenheit? | |
Ans.To convert Celsius to Fahrenheit, you can use the formula: \( F = \frac{9}{5}C + 32 \), where F is the temperature in Fahrenheit and C is the temperature in Celsius. For example, to convert 25 degrees Celsius to Fahrenheit, you would calculate \( F = \frac{9}{5} \times 25 + 32 \), which equals 77 degrees Fahrenheit.
| 3. How do you convert Fahrenheit to Celsius? | |
Ans.To convert Fahrenheit to Celsius, you can use the formula: \( C = \frac{5}{9}(F - 32) \), where C is the temperature in Celsius and F is the temperature in Fahrenheit. For instance, to convert 68 degrees Fahrenheit to Celsius, you would calculate \( C = \frac{5}{9}(68 - 32) \), resulting in approximately 20 degrees Celsius.
| 4. What are the common uses of Celsius and Fahrenheit scales? | |
Ans.The Celsius scale is commonly used in most countries around the world for everyday temperature measurements, especially in scientific contexts. The Fahrenheit scale is primarily used in the United States for weather forecasts, cooking, and other temperature-related applications. Each scale's usage is often dictated by geographical and cultural norms.
| 5. At what temperature do the Celsius and Fahrenheit scales intersect? | |
Ans.The Celsius and Fahrenheit scales intersect at -40 degrees, meaning that -40°C is equal to -40°F. This unique point occurs because the two scales have different zero points and increments, but they do overlap at this specific temperature.
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