00:01
Assuming that all the heat goes to the water, then we can say that q from the blades, the negative q, will be equal to q of the water.
00:15
The heat lost by the blades will equal the heat gained by the water.
00:20
We don't want the water to boil, so its maximum temperature would be 100 degrees celsius.
00:28
Q of the blades is going to be the heat capacity of the blades, which they tell us is 900 joules per kilogram degrees celsius, which will multiply by the mass of the blades, 273 kilograms, and its change in temperature.
00:55
We need to cool them from 300 degrees celsius to 50 degrees celsius.
01:00
So the final temperature is 50, the initial temperature is 300.
01:06
That then will be equal to q of water, which will be the specific heat of water, 4 ,180 joules per kilogram degrees celsius, multiplied by the mass of water, which we need to calculate, and it's changed in temperature...