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)
Answers: 3
Physics, 21.06.2019 23:30
Aquarterback pedals 3.3meters southward and then run 5.7meters northward. whats the distance ? and whats the displacement?
Answers: 2
Physics, 22.06.2019 06:30
The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.
Answers: 3
Physics, 22.06.2019 08:00
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
Answers: 2
Question 3: [08] You have an electrical hot water kettle with a power rating of 1750 Watts filled wi...
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