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 91 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
Excellent

AmberC1996

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Water potentials decrease (become more negative) as one moves from soil to plant to atmosphere Water potentials decrease (become more negative) as one moves from soil to plant to atmosphere
Establishing a caring and trusting relationship helps the client come to terms with a terminal illne Establishing a caring and trusting relationship helps the client come to terms with a terminal illne
Flow data for a healthy donor (top panel) and a HIV positive patient. CD3 is a T-cell marker, CD4 is ... Flow data for a healthy donor (top panel) and a HIV positive patient. CD3 is a T-cell marker, CD4 is ...
How to combine like-terms in expressions containing multi-brackets How to combine like-terms in expressions containing multi-brackets
Suppressing Negative Emotions Suppressing Negative Emotions
expiremntal psychology and its terms expiremntal psychology and its terms
Video: Adolescent Diabetes

For a complete list of videos, visit our video library