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 107 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?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

two-host life cycles of plasmodium two-host life cycles of plasmodium
Time Line of Human History From Upper Paleolithic Period to the Present Time Line of Human History From Upper Paleolithic Period to the Present
If you want to show differences between items at the same time, a bar graph is more effective than a If you want to show differences between items at the same time, a bar graph is more effective than a
Sterilization Time Requirements Sterilization Time Requirements
How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay? How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?
The three domains of life The three domains of life
Video: Hershey Chase Experiments

For a complete list of videos, visit our video library