« previous next »

Author Question: The half-life of radon-222 is 3.83 d. If a sample of radon initially contains 6.00 108 radon atoms, ... (Read 115 times)

lidoalex

  • Hero Member
  • *****
  • Posts: 538
on: Jul 29, 2018
The half-life of radon-222 is 3.83 d. If a sample of radon initially contains 6.00  108 radon atoms, how many of them are left after 10.0 d?
 
  A) 9.82  107
  B) 7.67  107
  C) 8.34  108
  D) 7.29  108
  E) 8.56  108

Question 2

The speed of sound varies with
 
  A) loudness.
  B) frequency.
  C) wavelength.
  D) all of the above
  E) none of the above


Ahnyah

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

Answer: E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

There are more bacteria in your mouth than there are people in the world.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

How to solve all of life's problems How to solve all of life's problems
Major Findings of the High Scope Preschool Study High Scope participants showed better academic per Major Findings of the High Scope Preschool Study High Scope participants showed better academic per
In 1891 William Dean Howells championed the poetry of Emily Dickinson: “This poetry is as characteri In 1891 William Dean Howells championed the poetry of Emily Dickinson: “This poetry is as characteri
To cleanse an open wound, begin close to the wound and work outward in full or half circles. To cleanse an open wound, begin close to the wound and work outward in full or half circles.
As their numbers grow and their resources and health improve, the elderly will enjoy life more and ... As their numbers grow and their resources and health improve, the elderly will enjoy life more and ...
Half-life explained Half-life explained
Video: How to make cDNA Animation

For a complete list of videos, visit our video library