« previous next »

Author Question: The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is the ... (Read 104 times)

codyclark

  • Hero Member
  • *****
  • Posts: 538
on: Jul 29, 2018
The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is the mean life (time constant) of this sample?
 
  What will be an ideal response?

Question 2

When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4. What is the wavelength of the light?
 
  A) 336 nm B) 752 nm C) 633 nm D) 452 nm E) 363 nm


frankwu0507

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 29, 2018
Answer to Question 1

6.91 s

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

codyclark

  • Hero Member
  • *****
  • Posts: 538
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


frankwu0507

  • Sr. Member
  • ****
  • Posts: 322
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Atmospheric pressure decreases as altitude increases. Atmospheric pressure decreases as altitude increases.
Sample Stress Management Program Sample Stress Management Program
Sample equipment maintenance log. Sample equipment maintenance log.
Sample Menu: Carb Choices Sample Menu: Carb Choices
Ice sheet growth and decay is complex Ice sheet growth and decay is complex
For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ... For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ...
Video: Lipid catabolism ( ketogenesis and oxidation of glycerol) and Lipid anabolism (lipogenesis)

For a complete list of videos, visit our video library