9th Class Physics New Book 2025 Chapter 7 Numericals 7.5, 7.6 | Punjab Board pctb 2025

9th Class Physics New Book 2025 Chapter 7 Numericals 7.5, 7.6 | Punjab Board pctb 2025 00:00 MCQ'S Chapter 07 Numericals 02:43 -Q7.1 The temperature of a normal human body on Fahrenheit scale is 98.6°F. Convert it into Celsius scale and Kelvin scale. 04:28 -Q7.2 At what temperature Celsius and Fahrenheit thermometer reading would be the same? 06:09 -Q7.3 Convert 5°F to Celsius and Kelvin scale. 07:38 -Q7.4 What is equivalent temperature of 25°C on Fahrenheit and Kelvin scales? 08:54 -Q7.5 The ice and steam points on an ungraduated thermometer are found to be 192 mm apart. What temperature will be on Celsius scale if the length of mercury thread is at 67.2 mm above the ice point mark? -Q7.6 The length between the fixed point of liquid-in-glass thermometer is 20 cm. If the mercury level is 4.5 cm above the lower mark, what is the temperature on the Fahrenheit scale? MCQ'S 7.3. Temperature of a substance is: (c) degree of hotness or coldness 7.4. Heat is the: (a) total kinetic energy of the molecules 7.5. In Kelvin scale the temperature corresponding to melting point of ice is: (c) 273 7.6. The temperature which has the same value on Celsius and Fahrenheit scales is: (d) -40 7.7. Which one is a better choice for a liquid-in-glass thermometer? (d) Water-glass 7.8. One disadvantage of using alcohol in a liquid-in-glass thermometer: (b) it has low freezing point (-112°C) 7.9. Water is not used as a thermometric liquid mainly due to: (c) its non-linear expansion 7.10. A thermometer has a narrow capillary tube so that it: (a) quickly responds to temperature changes 7.11. Which thermometer is most suitable for recording rapidly varying temperature? (b) Mercury-in-glass laboratory thermometer