Pleasesomeone help
1.Lucas has been challenged to increase the efficiency of a device he is redesigning. His goal is 90 percent efficiency. The work input of the device is fixed at 10 joules, so Lucas is trying to improve work output. How many joules of work output should Lucas aim for to attain his goal of 90 percent efficiency? Include the correct units with your answer.
2.Work output of a large machine in a factory is 89,000 joules, and its input is 102,000 joules. Workoutput of a similar machine is 92,000 joules, and its work input is 104,000 joules. Which machine has greater efficiency?

Question

Pleasesomeone help
1.Lucas has been challenged to increase the efficiency of a device he is redesigning. His goal is 90 percent efficiency. The work input of the device is fixed at 10 joules, so Lucas is trying to improve work output. How many joules of work output should Lucas aim for to attain his goal of 90 percent efficiency? Include the correct units with your answer.
2.Work output of a large machine in a factory is 89,000 joules, and its input is 102,000 joules. Workoutput of a similar machine is 92,000 joules, and its work input is 104,000 joules. Which machine has greater efficiency?

anonymous · Answer

can someone please halp me ANYONE!!!

anonymous · Answer

Answer to question 1 is 9joules

anonymous · Answer

Answer 2: The 2nd machine has more efficiency , which is 88.46%