Answer:
Volcanic ash helps scientists to determine the age of a rock sequence by using the process of RADIOMETRIC DATING
Explanation:
When scientist want to determine the age of a rock sequence, they try to find it they is a volcanic ash present. This volcanic ash tend to contains radio isotopes or radioactive elements that can be used to determine the age of the rock sequence. This process is called a Radiometric dating.
Radiometric dating can be defined as the process of dating rocks or other materials based or the known rate of decay of radioactive isotopes.
Radiometric dating has to involve parent and daughter radioactive isotopes therefore the following must be observed before carrying out radiometric dating.
a. The half life of the Parent radioactive isotopes must be known
b. The daughter radioactive isotopes must be available in substantial amounts and it must be differentiated from the parent radioactive isotopes
c. The parent radioactive isotope must have a longer half-life present in the volcanic ash as at the time of radiometric dating.
B) oxidation. Putting oxygen mixed with anything is oxidizing it.
Air moving across your skin promotes evaporation of the moisture on
your skin, and evaporation always carries heat energy away with it.
That's the whole purpose of sweating ... Your insides say to each other:
"We're burning up in here and we've got to get some relief ! Pump that
moisture out to the skin where it can evaporate and carry away some of
this heat energy that's building up in here!"
That's why you feel even hotter on a very humid day ... because you're
not able to evaporate as much moisture into air that's already very humid,
even if it's moving.
Answer:
G=GM/r^2
G=(6.67×10^-11)(6.39×10^23)/(3390000+400000)^2
G=(6.67×10^-11)(6.39×10^23)/(3790000)^2
G=2.967 m/s^2
Explanation: