Physics, 14.01.2020 18:31 21smartness21
At a fabrication plant, a hot metal forging has a mass of 75kg and a specific heat capacity of 430 j/(kg. c°). toharden it, the forging is immersed in 710 kg of oil that has atemperature of 32 °c and a specific heat capacity of 2700j/(kg. c°). the final temperature of the oil and forgingat thermal equilibrium is 47 °c. assuming that heat flowsonly between the forging and the oil, determine the initialtemperature of the forging.
Answers: 3
Physics, 22.06.2019 16:30
In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.
Answers: 3
Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
Physics, 22.06.2019 21:00
Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion
Answers: 3
At a fabrication plant, a hot metal forging has a mass of 75kg and a specific heat capacity of 430 j...
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