NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 1: Number System - Problems and SolutionsQuestion 129
Class 7 - Mathematics - Unit 1: Number System - Problems and Solutions
Question. 129
129. Convert the freezing points (°F) to the nearest integral values in °C using \(C=\tfrac{5}{9}(F−32)\) and complete the table.
| Gas | Freezing Point (°F) | Freezing Point (°C) |
|---|---|---|
| Hydrogen | −435 | — |
| Krypton | −251 | — |
| Oxygen | −369 | — |
| Helium | −458 | — |
| Argon | −309 | — |
Answer:
| Gas | Freezing Point (°F) | Freezing Point (°C) |
|---|---|---|
| Hydrogen | −435 | −259° C |
| Krypton | −251 | −157° C |
| Oxygen | −369 | −223° C |
| Helium | −458 | −272° C |
| Argon | −309 | −189° C |
Detailed Answer with Explanation:
Apply \(C=\dfrac{5}{9}(F−32)\) to each entry and round to the nearest integer.