« previous next »

Author Question: A pair of parallel plates, forming a capacitor, are charged. The plates are pulled apart to triple ... (Read 59 times)

Lisaclaire

  • Hero Member
  • *****
  • Posts: 569
on: Jul 28, 2018
A pair of parallel plates, forming a capacitor, are charged. The plates are pulled apart to triple the original separation, the charges on the plates remaining the same. What is the ratio of the final energy stored to the original energy stored?
 a. 1/9
  c. 1/3
  b. 1.5
  d. 3

Question 2

A bucket of water with total mass 23 kg is attached to a rope, which in turn is wound around a 0.050-m radius cylinder at the top of a well. The bucket is raised to the top of the well and released. The bucket is moving with a speed of 6.0 m/s upon hitting the water surface in the well. What is the angular speed of the cylinder at this instant?
 a. 39 rad/s
  c. 120 rad/s
  b. 79 rad/s
  d. 160 rad/s


bblaney

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Acromegaly in one individual from a pair of identical twins. Acromegaly in one individual from a pair of identical twins.
To examine a child’s ear, the pinna should be pulled back and up for children over 3 years; the pinn To examine a child’s ear, the pinna should be pulled back and up for children over 3 years; the pinn
Vasectomy. (a) Vas deferens is located within the spermatic cord on both sides. (b) A small incision Vasectomy. (a) Vas deferens is located within the spermatic cord on both sides. (b) A small incision
Necator americanus. The cutting plates around the mouth are used to tear open blood vessels of the ... Necator americanus. The cutting plates around the mouth are used to tear open blood vessels of the ...
Meiosis involves two complete divisional operations forming four potential sex cells. Meiosis involves two complete divisional operations forming four potential sex cells.
Small Plates Small Plates
Video: Audiology

For a complete list of videos, visit our video library