This topic contains a solution. Click here to go to the answer

Author Question: Which is the best indication of the usefulness of a machine, the actual mechanical advantage or the ... (Read 55 times)

chandani

  • Hero Member
  • *****
  • Posts: 541
Which is the best indication of the usefulness of a machine, the actual mechanical advantage or the theoretical mechanical advantage?

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. What is the charge on the outer surface of the shell now?
  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

bubulittle310@msn.cn

  • Sr. Member
  • ****
  • Posts: 281
Answer to Question 1

Since machines are generally used to increase the force that can be applied to a load,
the actual mechanical advantage is usually the most useful. The theoretical
mechanical advantage is sometimes useful, however, when the machine in question is
judged by how far the load is moved during its operation.

Answer to Question 2

1




chandani

  • Member
  • Posts: 541
Reply 2 on: Jul 28, 2018
:D TYSM


ebonylittles

  • Member
  • Posts: 318
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

For a complete list of videos, visit our video library