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

Author Question: A rock sample contains 1/4 micrograms of the parent radioactive isotope K-40 and 3/4 micrograms of ... (Read 85 times)

OSWALD

  • Hero Member
  • *****
  • Posts: 580
on: Jul 27, 2018
A rock sample contains 1/4 micrograms of the parent radioactive isotope K-40 and 3/4 micrograms of its daughter isotope Ar-40. If the half-life of this decay is 1.25 billion years, how old is this rock?
 
  A) 5.00 billion years
  B) 3.75 billion years
  C) 1.25 billion years
  D) 2.50 billion years

Question 2

Starting from rest, a proton falls through a potential difference of 1.2 kV. What speed does it acquire?
 
  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

kardosa007

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

4.8  105 m/s


OSWALD

  • Member
  • Posts: 580
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

nanny

  • Member
  • Posts: 313
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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?

Your heart beats over 36 million times a year.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Wave Rock Formation Wave Rock Formation
Population genetics sample question Population genetics sample question
Sample prescriptions of antibiotics for dental infections. Sample prescriptions of antibiotics for dental infections.
Similar Rock Outcrops on Mars and Earth Similar Rock Outcrops on Mars and Earth
How reciprocal functions compare to the parent function How reciprocal functions compare to the parent function
Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ... Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ...
Video: Ventilation - phases and driving forces

For a complete list of videos, visit our video library