This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Define efficiency. Give an example. ... (Read 47 times)

neverstopbelieb

  • Hero Member
  • *****
  • Posts: 534
on: Jul 28, 2018
Define efficiency. Give an example.

Question 2

A large, metallic, spherical shell has no net charge. It is supported on an insulating stand and has a small hole at the top. A small tack with charge Q is lowered on a silk thread through the hole into the interior of the shell. The tack is now allowed to touch the interior surface of the shell. After this contact, what is the charge on the tack?
  1.Q
  2.Q/2
  3.0
  4.-Q/2
  5.-Q


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

akemokai

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 28, 2018
Answer to Question 1

Efficiency is the ratio of the work output to the work input. Example: The work input
to a machine is 50 N m  and the work output is 40 N m  . The efficiency is 40 50 , or
80 percent.

Answer to Question 2

3


neverstopbelieb

  • Member
  • Posts: 534
Reply 2 on: Jul 28, 2018
Wow, this really help

kthug

  • Member
  • Posts: 332
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

There are more bacteria in your mouth than there are people in the world.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Here are images of live zebrafish that were studied for genetics and head size to give insight into Here are images of live zebrafish that were studied for genetics and head size to give insight into
How to give a Lovenox injection How to give a Lovenox injection
How do men who work in traditionally feminine nurturng jobs and women who work in jobs that give ... How do men who work in traditionally feminine nurturng jobs and women who work in jobs that give ...
Fortified foods can give your diet a vitamin boost Fortified foods can give your diet a vitamin boost
Ecosystem Energy Flow and Efficiency Ecosystem Energy Flow and Efficiency
Give the world a reason to remember your name Give the world a reason to remember your name
Video: Carbohydrate Metabolism: Introduction to renal processes and filtrate formation and composition

For a complete list of videos, visit our video library