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 96 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
Wow, this really help

juliaf

  • Member
  • Posts: 344
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

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?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

A small sample of the great diversity of seed sizes and shapes. A small sample of the great diversity of seed sizes and shapes.
Sample Teaching Plan for Hypertension Cont. Sample Teaching Plan for Hypertension Cont.
Sample prescriptions of antibiotics for dental infections. Sample prescriptions of antibiotics for dental infections.
Sample prescriptions of drugs for oral fungal infections. Sample prescriptions of drugs for oral fungal infections.
Facing the table, place one hand on the thigh and the other on the lower leg. Gently rock the leg ... Facing the table, place one hand on the thigh and the other on the lower leg. Gently rock the leg ...
Atmospheric currents carried radioactive fallout across much of Northern Hemisphere Atmospheric currents carried radioactive fallout across much of Northern Hemisphere
Video: Type of Transport - Active and Passive Processes

For a complete list of videos, visit our video library