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

Author Question: A glass container holds equal numbers of atoms of phosphorus 30 with a half-life of 2.5 minutes and ... (Read 64 times)

laurencescou

  • Hero Member
  • *****
  • Posts: 593
on: Aug 10, 2020

Question 1

44 g of petrified wood was found in a petrified forest. A sample showed a 14C activity of 100 decays/minute. How long has the tree been dead (in years)? (The half-life of carbon-14 is 5730 years and freshly cut wood contains 6.5 × 1010 atoms of 14C per gram.)

◦
12300

◦
15600

◦
8500

◦
4700

◦
2400


Question 2

A glass container holds equal numbers of atoms of phosphorus 30 with a half-life of 2.5 minutes and of nitrogen 13 with a half-life of 10 minutes. After 20 minutes the ratio of the number of nitrogen atoms remaining to the number of phosphorus atoms remaining is

◦
.

◦
.

◦
.

◦
64.

◦
256.
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by laurencescou on Aug 10, 2020

Natalie4ever

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Aug 10, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly


laurencescou

  • Member
  • Posts: 593
Reply 2 on: Aug 10, 2020
Wow, this really help

AISCAMPING

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

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?

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?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Sources of ring atoms Sources of ring atoms
Life cycle of Ascaris: Adult worms (1) live in the lumen of the small intestine. A female may ... Life cycle of Ascaris: Adult worms (1) live in the lumen of the small intestine. A female may ...
This red gasoline container holds about 30 gallons of gasoline and is used to fill vehicles used ... This red gasoline container holds about 30 gallons of gasoline and is used to fill vehicles used ...
Pregnancy Life Pregnancy Life
In the Florida lottery, the numbers (between 1 and 49) are generated randomly with the ... In the Florida lottery, the numbers (between 1 and 49) are generated randomly with the ...
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ... Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ...
Video: A timeline of the teeth (Explained - No Audio)

For a complete list of videos, visit our video library