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A substance has a half-life of 2.045 minutes. If the initial amount of the substance was 132.8 grams, how many half-lives will have passed before the substance decays to 8.3 grams? What is the total time of decay?
half-lives;
minutes
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The formula for an increasing population is given by
where
is the initial population and
Derive a general formula for the time
t it takes for the population to increase by a factor of
M .
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Recall the formula for calculating the magnitude of an earthquake,
Show each step for solving this equation algebraically for the seismic moment
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What is the
y -intercept of the logistic growth model
Show the steps for calculation. What does this point tell us about the population?
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Prove that
for positive
Let
for some non-negative real number
such that
Then,
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Real-world applications
For the following exercises, use this scenario: A doctor prescribes 125 milligrams of a therapeutic drug that decays by about 30% each hour.
Write an exponential model representing the amount of the drug remaining in the patient’s system after
hours. Then use the formula to find the amount of the drug that would remain in the patient’s system after 3 hours. Round to the nearest milligram.
mg
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For the following exercises, use this scenario: A tumor is injected with
grams of Iodine-125, which has a decay rate of
per day.
Write an exponential model representing the amount of Iodine-125 remaining in the tumor after
days. Then use the formula to find the amount of Iodine-125 that would remain in the tumor after 60 days. Round to the nearest tenth of a gram.
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A scientist begins with
grams of a radioactive substance. After
minutes, the sample has decayed to
grams. Rounding to five significant digits, write an exponential equation representing this situation. To the nearest minute, what is the half-life of this substance?
half-life: about
minutes
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The half-life of Radium-226 is
years. What is the annual decay rate? Express the decimal result to four significant digits and the percentage to two significant digits.
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The half-life of Erbium-165 is
hours. What is the hourly decay rate? Express the decimal result to four significant digits and the percentage to two significant digits.
So the hourly decay rate is about
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Questions & Answers
what is defense mechanism
what is defense mechanisms
Chinaza
I'm interested in biological psychology and cognitive psychology
what does preconceived mean
How can I develope my cognitive domain
why is communication effective
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
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miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
please i need answer
Wekolamo
because it helps many people around the world to understand how to interact with other people and understand them well, for example at work (job).
Agreed 👍 There are many parts of our brains and behaviors, we really need to get to know. Blessings for everyone and happy Sunday!
ARC
A child is a member of community not society elucidate ?
Isn't practices worldwide, be it psychology, be it science. isn't much just a false belief of control over something the mind cannot truly comprehend?
compare and contrast skinner's perspective on personality development on freud
Skinner skipped the whole unconscious phenomenon and rather emphasized on classical conditioning
war
explain how nature and nurture affect the development and later the productivity of an individual.
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
and having a good philosophy of the world is like a sandwich and a peanut butter 👍
Jonathan
generally amnesi how long yrs memory loss
interpersonal relationships
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Source:
OpenStax, Algebra and trigonometry. OpenStax CNX. Nov 14, 2016 Download for free at https://legacy.cnx.org/content/col11758/1.6
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