Answer:
The Fe-60, (iron-60) is formed during the gigantic scale explosion of the stars. However the amount of the isotope that can be located here on Earth after coming from distant stars is small
The Fe-60 is therefore, a source of evidence that the solar system formed from the after effect of stellar explosions.
The abundance of iron in the universe consists of 90% Fe-56, which has 26 protons along side 30 neutrons.
The Fe-60 however has 34 neutrons and the extra 4 neutrons given the Fe-60 its radioactive properties, such that it decays to form nickel-60 with an half life of 1.5 million years.
The nickel-60 found in meteorites are therefore, more or less the remnant of the radioactive decay of Fe-60 formed during the supernova explosion that likely formed our solar system
Explanation:
Answer:
How can I reduce my exposure to radiation from X-rays?
- Tell the X-ray technologist in advance if you are, or might be, pregnant.
- Ask if a protective shield can be used. ...
- Ask your dentist if he/she uses the faster (E or F) speed film for X-rays. ...
- Know your X-ray history.
Answer:
Correct option is (B). Nyctalopia affects vision in the fovea centralis, resulting in impaired vision.
Explanation:
Nyctalopia which is also known as night blindness, in this condition it's difficult to see in relatively low light. It can cause by two types one is from birth, and another is injury or vitamin A deficiency which is also called as malnutrition.
It is caused by the loss of normal rod function in retina, and loss their ability to response in the light. The outer part of retina is made up of more rods compare to cones, loss of peripheral area repeatedly results in night blindness.
Answer:
Schwann - animals are made of cells
Virchow - cells divide
Schleiden - plants are made of cells
Hooke - recognized living cells
Leeuwenhoek - observed cells and coined the term "cell"
Brainliest please! :)
