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

Author Question: The current in an electron beam in a cathode-ray tube is measured to be 280 A. How many electrons ... (Read 257 times)

daltonest1984

  • Hero Member
  • *****
  • Posts: 536
on: Jul 28, 2018
The current in an electron beam in a cathode-ray tube is measured to be 280 A. How many electrons hit the screen in 50 s? (e = 1.6  10-19 C)
 a. 2.2  1011 electrons
  c. 8.8  1015 electrons
  b. 8.8  1016 electrons
  d. 2.2  1015 electrons

Question 2

According to Newton's second law, the angular acceleration experienced by an object is directly proportional to:
 a. its moment of inertia. b. the net applied torque.
  c. the object's size.
  d. choices a and b above which are both valid.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jackie

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

B


daltonest1984

  • Hero Member
  • *****
  • Posts: 536
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


jackie

  • Sr. Member
  • ****
  • Posts: 324
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

electron microscope image of a pyralidae moth electron microscope image of a pyralidae moth
Scorpions, Spiders and Sharks: Electron-Microscope Images Scorpions, Spiders and Sharks: Electron-Microscope Images
Eustachian tube Eustachian tube
Electron micrograph of lysosomes. Electron micrograph of lysosomes.
Concentric double-pipe heat exchanger for co-current flow Concentric double-pipe heat exchanger for co-current flow
Current FDA Pregnancy Category Ratings with Examples Current FDA Pregnancy Category Ratings with Examples
Video: Contraction and Relaxation Animation

For a complete list of videos, visit our video library