« previous next »

Author Question: An isolated air-filled parallel-plate capacitor that is no longer connected to anything has been ... (Read 113 times)

waynest

  • Hero Member
  • *****
  • Posts: 553
on: Jul 29, 2018
An isolated air-filled parallel-plate capacitor that is no longer connected to anything has been charged up to Q = 2.9 nC.
 
  The separation between the plates initially is 1.20 mm, and for this separation the capacitance is 31 pF. Calculate the work that must be done to pull the plates apart until their separation becomes 5.30 mm, if the charge on the plates remains constant.
  (0 = 8.85  10-12 C2/N  m2)

Question 2

If 2.0 g of water at 0.00C is to be vaporized, how much heat must be added to it? The specific heat of water is 1.0 cal/gK, its heat of fusion is 80 cal/g, and its heat of vaporization is 539 cal/g.
 
  A) 1100 kcal B) 1200 cal C) 1500 cal D) 1100 cal E) 1300 cal


lkoler

  • Sr. Member
  • ****
  • Posts: 358
Reply #1 on: Jul 29, 2018
Answer to Question 1

0.46 J

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

waynest

  • Hero Member
  • *****
  • Posts: 553
Reply #2 on: Jul 29, 2018
Thanks


lkoler

  • Sr. Member
  • ****
  • Posts: 358
Reply #3 on: Jul 29, 2018
Welcome :)


« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Epiphyseal Plate in Long Bone Adolescent bone growth takes place along the epiphyseal plate Epiphyseal Plate in Long Bone Adolescent bone growth takes place along the epiphyseal plate
Directions and Rates of Plate Motions Directions and Rates of Plate Motions
A 23 kg mass is connected to a nail on a frictionless table by a massless string 1.3 m long. ... A 23 kg mass is connected to a nail on a frictionless table by a massless string 1.3 m long. ...
Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ... Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ...
A 230.0-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning ... A 230.0-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning ...
Artist’s depiction of the view inside the uterus, showing a fetus connected by an umbilical cord ... Artist’s depiction of the view inside the uterus, showing a fetus connected by an umbilical cord ...
Video: Embryonic development - Week 4

For a complete list of videos, visit our video library