![subject](/tpl/images/cats/fizika.png)
Physics, 13.03.2020 17:15 ErrorNameTaken505
160 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 25° C (the heat capacity of aluminum is 0.9 J/gram/K).
(a) After a short time, what is the temperature of the water?
Tfinal = ° C (b) What simplifying assumptions did you have to make?
The thermal energy of the water doesn't change.
Energy transfer between the system (water plus pan) and the surroundings was negligible during this time.
The thermal energy of the aluminum doesn't change.
The heat capacities for both water and aluminum hardly change with temperature in this temperature range.
(c) Next you place the pan on a hot electric stove. While the stove is heating the pan, you use a beater to stir the water, doing 30721 J of work, and the temperature of the water and pan increases to 85.8° C. How much energy transfer due to a temperature difference was there from the stove into the system consisting of the water plus the pan?
Q = ? J
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 09:40
Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 17:00
Explain what will happen if decomposers were apsent from a forest ecoysystem.
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 19:00
The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 19:30
Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical
Answers: 1
You know the right answer?
160 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an alumi...
Questions
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 17.02.2020 22:28
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2020 22:28
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 17.02.2020 22:29
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2020 22:29
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 17.02.2020 22:29
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2020 22:29
![question](/tpl/images/cats/ekonomika.png)