Teaching RPSC School Lecturer Mock Test Series 2024 Physics Thermal Properties of Matter Newton’s law of cooling
The temperature difference between a block of copper and surroundings decays exponentially with time. Its initial temperature at start is 40°C above surrounding, 2 min later it is 20°C above surroundings. The time in minutes from the start when temperature falls to 2.5°C above surroundings is
1
4 min
2
8 min
3
16 min
4
32 min
5
Question Not Attempted