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

Author Question: The first to be credited for assigning the terms positive and negative to electricity was A) ... (Read 88 times)

mynx

  • Hero Member
  • *****
  • Posts: 555
on: Jul 29, 2018
The first to be credited for assigning the terms positive and negative to electricity was
 
  A) William Crookes.
  B) J.J. Thomson.
  C) Robert Millikan.
  D) Benjamin Franklin.
  E) none of the above

Question 2

Three boxes in contact rest side-by-side on a smooth, horizontal floor.
 
  Their masses are 5.0-kg, 3.0-kg, and 2.0-kg, with the 3.0-kg box in the center. A force of 50 N pushes on the 5.0-kg box, which pushes against the other two boxes.
  (a) Draw the free-body diagrams for each of the boxes.
  (b) What magnitude force does the 3.0-kg box exert on the 5.0-kg box?
  (c) What magnitude force does the 3.0-kg box exert on the 2.0-kg box?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

annierak

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: D

Answer to Question 2

(a) The following forces act on the 5.0-kg box: the force due to gravity, normal force, contact force between 5.0-kg mass and 3.0-kg mass, the force of 50 N pushing on the box. The following forces act on the 3.0-kg box: the force due to gravity, normal force, contact force between the 5.0-kg box and the 3.0-kg box, the contact force between the 3.0-kg box and the 2.0-kg box. The following forces act on the 2.0-kg box: the force due to gravity, normal force, contact force between the 3.0-kg box and the 2.0-kg box.
(b) 25 N
(c) 10 N


mynx

  • Member
  • Posts: 555
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

sarah_brady415

  • Member
  • Posts: 328
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Negative control of a repressible set of genes: function of the trp repressor and corepressor in reg Negative control of a repressible set of genes: function of the trp repressor and corepressor in reg
Gram Positive Testing Gram Positive Testing
Anatomical terms for location and direction. Anatomical terms for location and direction.
How to evaluate algebraic expressions with given terms How to evaluate algebraic expressions with given terms
Control of Homeostasis: Positive Feedback Control of Homeostasis: Positive Feedback
Write equilibrium constant expressions for the following reactions in terms of concentration: Write equilibrium constant expressions for the following reactions in terms of concentration:
Video: Wound Cultures

For a complete list of videos, visit our video library