Physics
Physics, 03.07.2019 02:20, Brandonjr12

Jin knows that the initial internal energy of a closed system is 78 j and the final internal energy is 180 j. he also knows that 64 j of energy are used to do work. to find the heat added to the system, jin completes the steps below. 1. add the initial internal energy plus the final internal energy to find the change in internal energy. 2. add the change in internal energy to the energy used to do work. 3. write the answer in joules. which best describes jin's error? for step 1, he should have used 180 j as the change in internal energy. for step 1, he should have subtracted 78 j from 180 j to find the change in internal energy. for step 2, he should have subtracted the change in internal energy from the energy used to do work. for step 2, he should have subtracted the energy used to do work from the change in internal energy.

answer
Answers: 3

Other questions on the subject: Physics

image
Physics, 22.06.2019 05:20, lea5261
Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.
Answers: 2
image
Physics, 22.06.2019 11:50, morenodonaldo762
The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e
Answers: 1
image
Physics, 22.06.2019 20:10, kerarucker12pe384k
Atruck with 34-in.-diameter wheels is traveling at 55 mi/h. find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes:
Answers: 2
image
Physics, 23.06.2019 01:30, martinezkimberly706
Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class
Answers: 3
Do you know the correct answer?
Jin knows that the initial internal energy of a closed system is 78 j and the final internal energy...

Questions in other subjects: