![subject](/tpl/images/cats/fizika.png)
Physics, 09.09.2021 14:50 mackdoolittle1
Question 3: [08] You have an electrical hot water kettle with a power rating of 1750 Watts filled with 2.0 L of water at room temperature. Calculate for how many minutes you must have the kettle switched on to make the water boil (ignore heat losses, use mean heat capacity!). Question 4: [15] You have two identical pieces of copper, each weighing 200 g, in contact with each other, the temperature of the one being 900°C, that of the other 75°C. Heat transfer should only be between the two metal pieces, but not with the surroundings 4.1 What will happen to the temperature of the copper pieces? (5) 4.2 Is what is happening reversible or irreversible (spontaneous)? (5) 4.3 Calculate the change of entropy that occurs (use mean heat capacity value for copper)​
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 20:30
Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground
Answers: 1
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 09:30
The necleus of an atom is made up of what subatomic particles?
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 00:50
Which of the following examples illustrates static friction? a box sits stationary on a ramp. a ball rolling on the lawn eventually comes to rest. a car rounds a curve on a road. a fish swims upstream.
Answers: 1
You know the right answer?
Question 3: [08] You have an electrical hot water kettle with a power rating of 1750 Watts filled wi...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 28.06.2019 08:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/en.png)
English, 28.06.2019 08:30
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 28.06.2019 08:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 28.06.2019 08:30
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.06.2019 08:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.06.2019 08:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.06.2019 08:30