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

Author Question: A radioactive substance containing 4.0 1016 unstable atoms has a half-life of 2.0 days. What is its ... (Read 108 times)

Pineapplelove6

  • Hero Member
  • *****
  • Posts: 560
on: Jul 29, 2018
A radioactive substance containing 4.0  1016 unstable atoms has a half-life of 2.0 days. What is its activity (in curies, Ci) after 1.0 day? (1 Ci = 3.70  1010 Bq)
 
  What will be an ideal response?

Question 2

An object of mass 8.0 kg is attached to an ideal massless spring and allowed to hang in the Earth's gravitational field. The spring stretches 3.6 cm before it reaches its equilibrium position.
 
  If this system is allowed to oscillate, what will be its frequency?
  A) 0.0045 Hz B) 0.67 Hz C) 2.6 Hz D) 2.1 Hz


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 29, 2018
Answer to Question 1

4.3 Ci

Answer to Question 2

C


Pineapplelove6

  • Hero Member
  • *****
  • Posts: 560
Reply #2 on: Jul 29, 2018
Thank you!


rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Jul 29, 2018
Always glad to help...


« previous next »
 

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

The web of life The web of life
Substance Abuse : Biological, Psychological and Sociocultural Levels Substance Abuse : Biological, Psychological and Sociocultural Levels
In pretend play, toy figures and animals “come to life” and interact with each other. In pretend play, toy figures and animals “come to life” and interact with each other.
Should We Prolong Life at all Costs? Should We Prolong Life at all Costs?
Apply the substance to the abdomen in a clockwise motion. Apply the substance to the abdomen in a clockwise motion.
Life cycle of Obelia, a hydrazoan that has alternating medusa (left) and polyp generations Life cycle of Obelia, a hydrazoan that has alternating medusa (left) and polyp generations
Video: EpiPen Animation (Part 2)

For a complete list of videos, visit our video library