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

Author Question: How long would it take 4.00 1020 atoms to decay to 1.00 1019 atoms if their half-life was 14.7 ... (Read 97 times)

dakota nelson

  • Hero Member
  • *****
  • Posts: 604
on: Jul 29, 2018
How long would it take 4.00  1020 atoms to decay to 1.00  1019 atoms if their half-life was 14.7 years?
 
  A) 58.8 years B) 78.2 years C) 147 years D) 29.4 years

Question 2

The image of a plant is 4.0 cm from a concave spherical mirror having a radius of curvature of 10 cm. Where is the plant relative to the mirror?
 
  A) 4.4 cm in front of the mirror
  B) 9.0 cm in front of the mirror
  C) 1.0 cm in front of the mirror
  D) 2.2 cm in front of the mirror
  E) 20 cm in front of the mirror


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

todom5090

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

D


dakota nelson

  • Hero Member
  • *****
  • Posts: 604
Reply #2 on: Jul 29, 2018
Thanks


todom5090

  • Sr. Member
  • ****
  • Posts: 328
Reply #3 on: Jul 29, 2018
Welcome :)


« previous next »
 

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Life of a Medical School Student Life of a Medical School Student
Solution (Polynomial Long Division) Solution (Polynomial Long Division)
Grace Ndiritu, Still Life: White Textiles. Grace Ndiritu, Still Life: White Textiles.
Sticky foods such as dried fruits can adhere to teeth and promote decay Sticky foods such as dried fruits can adhere to teeth and promote decay
Life Expectancy in Developed Countries Life Expectancy in Developed Countries
Half-life explained Half-life explained
Video: Role of complement proteins

For a complete list of videos, visit our video library