Answer:
The rock is 3.75 billion years ago.
Explanation:
Given that:
Half life = 1.25 billion years
1 billion years = 10⁹ years
So,
Half life = 1.25 × 10⁹ years
Where, k is rate constant
So,
The rate constant, k = 5.5452 × 10⁻¹⁰ years⁻¹
Initial amount [A₀] = 80 micrograms
Final amount ![[A_t]](https://tex.z-dn.net/?f=%5BA_t%5D)
= 10 micrograms
Using integrated rate law for first order kinetics as:
![[A_t]=[A_0]e^{-kt}](https://tex.z-dn.net/?f=%5BA_t%5D%3D%5BA_0%5De%5E%7B-kt%7D)
So,
So,
<u>The rock is 3.75 billion years ago.</u>
Answer:
stereotyping
Explanation:
According to social psychology, a stereotype refers to the over-generalized belief about an individual based on his membership or category of a particular group. Although generally, it is used to simplify our social environment, it lacked the relevance of individual differences and therefore can result in discriminatory behavior.
1)Having a Successful Studying Routine:Try to study over the course of a week, not just one night. Revisiting the information moves it from short-term memory (the kind that disappears almost immediately) to long-term memory, where you can retrieve it for later.[1] Ideally, take a look at the content a little bit every day.
2)Start as soon as possible:Organize a notebook and folder for the class. Keep all your papers together when you need to pull them out three months later. Keep your syllabus accessible to use it as a rough outline for the class. Don't forget to keep up the studying on a daily basis, don't leave it for the last minute!
3)Ask your teacher what things she/he want you to study:Remember, any little detail on a test can become a question!
4)Get some sleep:Before you go to bed , hit the hardest concepts. Then when you do hit the hay, your brain has hours and hours to let it sink in. The fluff can be tackled mid-afternoon -- let the difficult stuff stew overnight for maximum retention
5)Make time for breakfast:In fact:research says that your diet the week before the test matters, too! Students that were placed on a high-fat, high-carb diet did worse than those loading up on fruits, veggies, and complex, whole grains. Do yourself, your body, and your mind a favor by eating right. By eating right, you can get the right nutrients that your body needs, and you will be able to retain information better
<span>The Columbian Exchange refers to a period of cultural and biological exchanges between the New and Old Worlds. Exchanges of plants, animals, diseases and technology transformed European and Native American ways of life. Beginning after Columbus' discovery in 1492 the exchange lasted throughout the years of expansion and discovery. The Columbian Exchange impacted the social and cultural makeup of both sides of the Atlantic. Advancements in agricultural production, evolution of warfare, increased mortality rates and education are a few examples of the effect of the Columbian Exchange on both Europeans and Native Americans</span>
