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

Author Question: Given that the half-life for radium-226 is 1600 y, how long is the quarter-life (that is, the time ... (Read 105 times)

Lobcity

  • Hero Member
  • *****
  • Posts: 524
on: Jul 29, 2018
Given that the half-life for radium-226 is 1600 y, how long is the quarter-life (that is, the time for the radiation to decay to one-fourth of its initial level)?
 
  What will be an ideal response?

Question 2

A round 0.85-mm-diameter hole is illuminated by infrared light of wavelength 2.5 m What is the angle of the first dark fringe in the resulting pattern?
 
  A) 4.8  10-2 degrees B) 3.6  10-3 degrees C) 0.21 degrees D) 1.2  10-2 degrees


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 29, 2018
Answer to Question 1

3200 years

Answer to Question 2

C


Lobcity

  • Hero Member
  • *****
  • Posts: 524
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Cell division in common life cycles Cell division in common life cycles
The Many Faces of Life The Many Faces of Life
inner life of cell inner life of cell
Nursing Student life Nursing Student life
U.S. Life Expectancy by Year of Birth U.S. Life Expectancy by Year of Birth
A mother invests $9000 in a bank account at the time of her daughter's birth. The interest is ... A mother invests $9000 in a bank account at the time of her daughter's birth. The interest is ...
Video: Proteins Defined, Hierarchy & Composition of Cells

For a complete list of videos, visit our video library