The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years
<h3>What is the half life of an element?</h3>
The formula for half life is;
A(t) = A₀ * (¹/₂)^(t/t_1/2)
Where;
A(t) is amount left after t years
A₀ the initial quantity of the substance that will undergo decay;
t_1/2 is the half-life of the decaying quantity.
We are given;
t_1/2 = 28.8 years
A₀ = 1 g
A(t) = 250 mg = 0.25 g
Thus;
0.25 = 1 * (¹/₂)^(t/28.8)
log 0.25 = (t/28.8) log (1/2)
-0.60206 = (t/28.8) * -0.3010
t = 2 * 28.8
t = 57.6 years
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Once upon a time there lived a lovely princess with fair skin and blue eyes. She was so fair that she was named Snow White. Her mother died when Snow White was a baby and her father married again. This queen was very pretty but she was also very cruel. The wicked stepmother wanted to be the most beautiful lady in the kingdom and she would often ask her magic mirror, “Mirror! Mirror on the wall! Who is the fairest of them all?” And the magic mirror would say, “You are, Your Majesty!” But one day, the mirror replied, “Snow White is the fairest of them all!” The wicked queen was very angry and jealous of Snow White. She ordered her hunt
In a way, this is a double edged sword. On one hand, the animals are needed to best test the effects, but on the other hand it can be seen as very unethical. Honestly, I don't really see a way around using the animals. Unless you get human volunteers, but there is no way to fully make them understand what they are getting themselves into which can turn unethical very, very fast. If all of a sudden one of your human volunteers decides that they do not want to be a part of the test anymore, there is noting you can do to reverse what has already been done.
The answer about improving your writing skills is explained below.
Explanation:
When you are in you education career, or in your professional career, writing skills cannot be neglected. You continuously need to write things down, either in the form of assignments, articles, presentations, letters, agenda, minutes, reports, etc. So your writing skills must be fantastic. Following are some ways that would help you to improve your skills of writing:
- Be concise and clear while writing anything
- Keep the topic short
- Watch your tone while writing
- Break down the topic into paragraphs
- Stay on the topic, don't move out of context, etc
If you correctly follow the above mentioned ways of writing something, then your writing skills will be improved in a short period of time.
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Consensus democracy is commonly defined as <u>a process of decision-making that considers varying opinions, not just taking into account opinions that are held by the majority. </u>
In Kohlberg’s theory of moral development, consensus democracy is necessary <em>because it is one of the primary mechanism that an individual can utilize to develop his or her morality from pre-conventional to post-conventional level.</em>
