0
Why is the biological half-life of a radioisotope shorter then its physical half-life?
The biological half-life of a radioisotope is shorter than its physical half-life because it accounts for the rate at which the isotope is eliminated from the body through biological processes, such as metabolism and excretion. While the physical half-life refers to the time it takes for half of the radioactive atoms in a sample to decay, the biological half-life reflects the combined effects of both radioactive decay and biological elimination. Therefore, the biological half-life can be significantly shorter due to the body's ability to remove or process the isotope more rapidly than its intrinsic decay rate.
What else can I help you with?
Why effective half life is always less than biological half life?
The effective half-life is always less than the biological half-life because it accounts for both biological processes (like metabolism and excretion) and physical processes (like radioactive decay, if applicable). In the case of a substance that is being eliminated from the body, the biological half-life only considers the biological elimination rate, while the effective half-life reflects the combined impact of both biological and physical elimination mechanisms. This results in a shorter effective half-life because the presence of multiple pathways for elimination leads to a more rapid overall decrease in the substance's concentration in the body.
A pencil becomes shorter after sharpening is it a physical or chemical?
Sharpening a pencil is a physical change because it does not alter the chemical composition of the pencil. The act of sharpening simply removes material from the pencil, making it shorter in length.
When scientists use the term biological rhythm they are referring to?
When scientists use the term biological rhythm, they are referring to the natural cycles of physical, mental, and behavioral changes in living organisms that occur in response to environmental cues. These rhythms can include circadian rhythms, which follow a roughly 24-hour cycle, as well as ultradian (shorter than a day) and infradian (longer than a day) rhythms. These biological rhythms help regulate various physiological processes, such as sleep-wake cycles, hormone release, and metabolism, and are crucial for maintaining homeostasis within the body.
How do you shorten the half-life of a radioactive element?
Making any change in the half-life of an isotope of any element is generally something that lies outside our abilities. A very few radioactive materials have demonstrated a change in their half-lives when bathed in intense magnetic fields. Generally, however, the half-life on a given radionuclide is not something that can be changed. A number of experiments have been conducted wherein investigators have deliberately sought to influence radioactive half-life, but in all but the rarest cases, radionuclides are sublimely resistant to having their half-lives changed.
Is burning candle getting shorter physical or chemical change?
Burning a candle is a chemical change because the wax undergoes a chemical reaction with oxygen in the air to form new substances like carbon dioxide and water. This process results in the candle getting shorter as it burns.
Why is the biological half life of a radioisotope shorter than it's physical half life?
Due to its metabolism, a living being can get rid of some of the isotope's atoms before they decay.
What does the half life tell about a radioisotope?
How long it takes for half of a sample to decay to another form.
A pencil becomes shorter after sharpening is it a physical or chemical?
Sharpening a pencil is a physical change because it does not alter the chemical composition of the pencil. The act of sharpening simply removes material from the pencil, making it shorter in length.
What is a half life of a radioisotope?
The half-life of a radioisotope is the time it takes for half of the atoms in a sample to decay. It is a characteristic property unique to each radioisotope and can be used to determine the rate of radioactive decay. Shorter half-lives indicate faster decay rates.
Do all individuals show physical changes of aging in their 60's and 70's why or why not?
Yes you do have physical changes like growing shorter and geting fatter
What are four types of biological rhythms?
Circadian rhythms (daily cycles), ultradian rhythms (cycles shorter than 24 hours), infradian rhythms (cycles longer than 24 hours), and seasonal rhythms (yearly cycles) are four types of biological rhythms.
Does the biological clock dictate when you die?
The length of your telomeres may have a lot do with the "biological clock". Telomeres are sequences of non-coding ("junk") sequences at the end of your chromosomes. Because your DNA gets a little bit shorter every time it replicates, your telomeres get shorter and shorter as you age. Once these telomeres are gone you will have more difficulty replicating DNA. The biological clock refers to your circadian rhythm, which regulates sleep/wake cycles. It is controlled by melatonin secretions by the pineal gland. In popular usage, it may also refer to a woman's age in relation to her fertility. Another words, yes/no, depends on your life style/habbits and many other factors/heir is low, but is a factor.
Does uranium 238 have the shortest half life?
No, uranium-238 has a long half-life of about 4.5 billion years. It is a naturally occurring isotope that is commonly found in nature. Shorter-lived isotopes, such as radon-222 or polonium-214, have much shorter half-lives.
How is the importance of half-life an important consideration surrounding the use of nuclear power storage of nuclear waste?
The halflife of a particular isotope simply tells how long it will remain dangerously radioactive. By storing the spent fuel rods on site much of the shorter lived more intense radiation will have decayed before moving it to a long term repository.
What does the half life of a radioisotope represent?
It tells what fraction of a radioactive sample remains after a certain length of time.
What is the physical change of paper?
a physical change of paper is ex: ripping,cutting, and anything else to make the paper smaller, shorter, or less of what it was. tearing,
Do you need the toilet?
A toilet is necessary to dispose of various human biological waste. Without proper waste disposal a human may be more apt to getting diseases which may lead to a shorter lifespan.
