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

Author Question: A rock sample containing an isotope with a half-life of 12 million years has an initial mass of 72 ... (Read 91 times)

sheilaspns

  • Hero Member
  • *****
  • Posts: 567
on: Jul 13, 2018
A rock sample containing an isotope with a half-life of 12 million years has an initial mass of 72 grams. How much of the parent isotope will be present after three half-lives?
 A)4.5 grams
 B)9 grams
 C)18 grams
 D)54 grams
 E)63 grams

Question 2

Creep occurs only on weathered or soil-covered surfaces of moderate slope.
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Zack0mack0101@yahoo.com

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 13, 2018
Answer to Question 1

B

Answer to Question 2

False


sheilaspns

  • Member
  • Posts: 567
Reply 2 on: Jul 13, 2018
:D TYSM

cassie_ragen

  • Member
  • Posts: 347
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Bhimbetka rock painting showing man riding on horse, India Bhimbetka rock painting showing man riding on horse, India
Older adults may grieve intensely over the loss of a person or situation that has been a part of the Older adults may grieve intensely over the loss of a person or situation that has been a part of the
The declining age of menarche over the past 150 years has been measured in many European countries, The declining age of menarche over the past 150 years has been measured in many European countries,
Checklist of Developmental Skills: Birth to 5 years Cont. Checklist of Developmental Skills: Birth to 5 years Cont.
Demographic change and the effect on people social, and economic life Demographic change and the effect on people social, and economic life
Flowering plant life cycle Flowering plant life cycle
Video: Primary and secondary response to infection

For a complete list of videos, visit our video library