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

Author Question: A capacitor is attached across a battery and charged. Then the battery is removed leaving the ... (Read 94 times)

dejastew

  • Hero Member
  • *****
  • Posts: 562
on: Jul 28, 2018
A capacitor is attached across a battery and charged. Then the battery is removed leaving the capacitor charged. The positive lead of the capacitor is then connected to one lead of a previously uncharged identical capacitor, and then the other lead of the charged capacitor is connected to the other lead of the second capacitor. How does the energy E0 stored in the originally charged capacitor compare to the energy Ef stored in the connected capacitors?
 a. E0 = 2Ef
  c. E0 = 4Ef
  b. E0 < Ef
  d. E0 = Ef

Question 2

A rod of length L is pivoted about its left end and has a force F applied perpendicular to the other end. The force F is now removed and another force F is applied at the midpoint of the rod. If F is at an angle of 30o with respect to the rod, what is its magnitude if the resulting torque is the same as when F was applied?
 a. F
  c. 3F
  b. 2F
  d. 4F


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

maaaaaaaaaa

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


dejastew

  • Member
  • Posts: 562
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

okolip

  • Member
  • Posts: 362
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

An Oral, Battery-Operated Thermometer An Oral, Battery-Operated Thermometer
This bike actually flies—thanks to six horizontal propellers and a battery-powered motor. Changing ... This bike actually flies—thanks to six horizontal propellers and a battery-powered motor. Changing ...
The schematic of a variable valve timing control circuit, showing that battery power (+) is being ... The schematic of a variable valve timing control circuit, showing that battery power (+) is being ...
Denture sore mouth in a patient who never removed partial dentures at night. Denture sore mouth in a patient who never removed partial dentures at night.
Capacitors in parallel and an equivalent capacitor Capacitors in parallel and an equivalent capacitor
In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ... In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ...
Video: Polymerase chain reaction PCR - Animation

For a complete list of videos, visit our video library