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

Author Question: How can a half-life be used to tell the age of a sample? A) The half-life of an isotope is ... (Read 51 times)

bio_gurl

  • Hero Member
  • *****
  • Posts: 524
on: Jul 29, 2018
How can a half-life be used to tell the age of a sample?
 
  A) The half-life of an isotope is constant.
  B) The amount of radioactive form depends on the amount of radiation in the surroundings.
  C) The ratio between the radioactive form and the stable form depends on the archaeological record.
  D) The ratio between the radioactive form and stable form varies regularly with time.
  E) both C and D

Question 2

When a beam of light, originally traveling in air, enters a piece of glass having an index of refraction of 3/2, its wavelength
 
  A) increases by a factor of 3/2.
  B) is reduced to 2/3 its original value.
  C) is unaffected.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ApricotDream

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: D

Answer to Question 2

B


bio_gurl

  • Member
  • Posts: 524
Reply 2 on: Jul 29, 2018
:D TYSM

strudel15

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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.

season of life season of life
Sample prescriptions of antibiotics for dental infections. Sample prescriptions of antibiotics for dental infections.
Sample time management planning chart for a massage student. Sample time management planning chart for a massage student.
Still Life, House of The Stags (Cervi) Still Life, House of The Stags (Cervi)
The impact of industry and manufacturing on our life The impact of industry and manufacturing on our life
Life cycle of a typical flowering plant. Life cycle of a typical flowering plant.
Video: Primate Evolutionary Tree Animation

For a complete list of videos, visit our video library