NO STIRRING STIRRING NO STIRRING STIRRING Time/s 0.0 60.0 120.0 180.0 240.0 300.0 240.0 300.0 120.0 180.0 240.0 300.0 60.0 120.0 180.0 60.0 0.0 60.0 300.0 0.0 120.0 240.0 180.0 0.0 Bottom Thermometer 23 26 27 28 22 खर्च 23 28 29 20 21 22 24 26 27 21 23 255 26.3 2711 24 2524 26 Thermocouple 21 S 26 27 28 19 २५ 20 22 23 21 22 23 21 22 २२ 23 199 24 24 19100 Top Thermometer 20.5 24.5 22-25 26.5 27,5 285 235 27 23 28 २१८ ر 36 31.5 25 26.5 28 २१ 30 31 24 2401 रा 26 27 Thermocouple 23 49 24 25 26 2227 23 28 X 26 24 27 28 29 सन् 23 Insulated 24 25 26 28. 2व २० य २२ 23 2014 Uninsulated 23



We plot the graph in excel ...
On y axis: Measured temperature using thermometer
On x-axis: measured temperature using thermocouple
1. Uninsulated with no stirring
Uninsulated (unstirred case) | ||||
Bottom temperature | Top temperature | |||
Time (s) | Thermometer | Thermocouple | Thermometer | Thermocouple |
0 | 23 | 21 | 23.5 | 23 |
60 | 26 | 24 | 24.5 | 24 |
120 | 27 | 25 | 25 | 25 |
180 | 28 | 26 | 26.5 | 26 |
240 | 29 | 27 | 27.5 | 27 |
300 | 30 | 28 | 28.5 | 28 |
Bottom temperature: The equation of the line is y = x-2
This is of the form y = mx+c
/
m= slope and c = y-intercept
Now slope=1, and c = -2. This means that the rate at which the temperature readings of the thermometer and the thermocouple change are the same, but the thermocouple’s readings are 2 C lower than that of the thermometer readings
Top temperature: Equation of the line is y = 0.9748x+0.2357
This means the rate at which the thermocouple readings change is 0.97 times than the rate at which the temperature readings of the thermometer changes
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