1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bogdan [553]
3 years ago
11

Suppose you find a rock originally made of potassium-40, half of which decays into argon-40 every 1.25 billion years. You open t

he rock and find 31 atoms of argon-40 for every atom of potassium-40. How long ago did the rock form?
Chemistry
1 answer:
FromTheMoon [43]3 years ago
6 0

We see that in 1 rock, there are 31 atoms of Argon and 1 atom of Potassium so the relative concentration of Potassium is:

1 / 32

or can be written as:

1 / 2^5

So this means that 5 half-lives have passed.

So the years are:

<span>years passed = 5 * 1.25 billion years = 6.25 billion years</span>

You might be interested in
What three human body systems coordinate cause an arm to move
tia_tia [17]
(A) nervous, muscular, skeletal
8 0
3 years ago
If 20.6 grams of ice at zero degrees Celsius completely change into liquid water at zero degrees Celsius, the enthalpy of phase
netineya [11]

Answer:

True

Explanation:

4 0
4 years ago
Activities that shows the nature and goals of anthropology,Sociology and Political Science​
frez [133]

To answer the question effectively, we will talk about the key words in the question.

ANTHROPOLOGY, SOCIOLOGY AND POLITICAL SCIENCE.

ANTHROPOLOGY; This is the study of human kinds in all times and places,it also entails humanistic study which includes our prehistoric origins and contemporary human diversity as well as topics like social change,globalization,human origin and the world history.

The activities that shows the nature and goals of anthropology includes;

- Looking at ones own culture in a more objective way like an outsider.

- Discovering the things that make people more different from one another.

- Producing new theories and knowledge about human home and their behaviors.

- Discovering/finding out what all people have in common.

There are four fields of anthropology; Linguistic anthropology, Biological anthropology, Archeology and cultural anthropology.

SOCIOLOGY; This is the scientific study of human civilization.

It is systemic and studies of groups and societies that people build

and the effect these have on their behavior.

Sociology greatly focuses on various social connections,

structures, organizations, processes and institutions.

The activities that show the goals and nature of sociology includes;

- Broadening our familiarity on facts about sociology.

- Critically studying the nature of humanity.

- Exposing our minds to the diverse perspectives on attaining the truth.

- Obtaining possible theories about the society.

- Understanding and appreciating that all things in the society are interdependent with each other.

Sociology brings together inputs that are composed of frequent forms and manners,they include; view points, consolidated values, attitudes and the norms of social institutions.

The different branches of sociology are; social psychology,social organisation, applied sociology, population studies, sociological theory and research,human ecology,social change.

POLITICAL SCIENCE; This is a discipline in academics that deals with the study of political processes, institutions, governments and behaviors of people.

It studies the complex behaviors of the people in power, various political actors, such as the government administration, opposition ad the subjects which are the masses.

5 0
4 years ago
Which of the following is the best definition of a physical change?
ELEN [110]
I think answer is

C. Something that can be observed or measured while changing the identity of the substance
7 0
3 years ago
Read 2 more answers
How are acids and bases defined by bronsted lowry?​
lesantik [10]

A Bronsted-Lowry acid is a chemical species that donates one or more hydrogen ions in a reaction. In contrast, a Bronsted-Lowry base accepts hydrogen ions. When it donates its proton, the acid becomes its conjugate base. A more general look at the theory is as an acid as a proton donor and a base as a proton acceptor. :)

4 0
3 years ago
Other questions:
  • Why does it take a large truck longer to stop than a compact car, even though both are traveling at the same velocity?
    9·2 answers
  • What is the definition of physical and chemical properties of matter?
    7·1 answer
  • How are biotic factors different from abiotic factors?
    14·1 answer
  • Calculate the formula mass of each compound given below hno3
    14·1 answer
  • What do you chemically call water???
    13·2 answers
  • How do you explain density column?
    8·1 answer
  • Please help I’ll mark you as brainliest if correct
    15·1 answer
  • When Nitrogen gas gets cold enough it can form a liquid. This liquid nitrogen is an
    6·1 answer
  • What happens to the O2 levels during the light and dark?
    11·1 answer
  • When you apply heat energy to a substance, where does the energy go? Think about the law of conservation of energy.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!