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:
ice glaciers melting
erosion of the ozone layer
air pollution
oil in the ocean and trash in the ocean
Answer:
Behavioral
Explanation:
In psychology, moral development has to do with the understanding of morality that takes place since childhood and until adulthood. According to different models, we go through different stages in our moral development as we grow older.
However, moral development has two different aspects:
- Cognitive: Has to do with our thoughts and beliefs about things and their morality.
- Behavioral: Has to do with our actions regarding rules and morality, it's the way we act in moral dilemmas.
In this example, Professor Jones is studying how a person responds to the temptation to violate moral rules such as lying and cheating, we can see that <u>both lying and cheating refer to behaviors,</u> therefore, he is focusing on the behavioral aspect of moral development.
Answer:
Roles of a homemaker
Doing the weekly grocery shopping.
Setting and monitoring budgets.
Cleaning, cooking and doing the laundry.
Scheduling and overseeing property maintenance.
Coordinating other household management activities.
Caring for children.
Advising household owners in housekeeping matters.
Answer: FDR's ambitious plan transformed the Tennessee Valley by creating dams and reservoirs for electricity and flood control, controlling soil erosion through forest restoration and better farming techniques, and improving navigation and commerce along the Tennessee River.
