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

Author Question: Fermium-253 has a half-life of 3.00 d. A sample of fermium contains 7.37 107 nuclei. How long will ... (Read 22 times)

SAVANNAHHOOPER23

  • Hero Member
  • *****
  • Posts: 542
on: Jul 29, 2018
Fermium-253 has a half-life of 3.00 d. A sample of fermium contains 7.37  107 nuclei. How long will it take for there to be only 3.36  106 fermium nuclei in this sample?
 
  A) 2.75 d
  B) 9.80 d
  C) 13.4 d
  D) 15.7 d
  E) 58.6 d

Question 2

A person's hyperopic (farsighted) eye can focus on objects that are 75 cm away and farther. What power and what focal length contact lenses should be prescribed so this person can see objects 25 cm and farther from the eye?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

akpaschal

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

2.7 diopters, 38 cm


SAVANNAHHOOPER23

  • Member
  • Posts: 542
Reply 2 on: Jul 29, 2018
Excellent

bbburns21

  • Member
  • Posts: 336
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Life cycle of Obelia, a colonial cnidarian. Life cycle of Obelia, a colonial cnidarian.
Parenting Styles Reported by a Representative Sample of American Adolescents Parenting Styles Reported by a Representative Sample of American Adolescents
Endochondral ossification of long bone. Endochondral ossification of long bone.
Long-term Potentiation in the granule cell layer of the rat hippocampal dentate gyrus. (Traces ... Long-term Potentiation in the granule cell layer of the rat hippocampal dentate gyrus. (Traces ...
The energy cycle of life The energy cycle of life
Marine Life Zones "الحياة في أعماق البحار" Marine Life Zones "الحياة في أعماق البحار"
Video: Bond in biological molecules (Ionic, Covalent and Hydrogen bonds)/ How atoms bond?

For a complete list of videos, visit our video library