Answer:
The validation of seafloor spreading in the 1950s and 60s
Explanation:
The theory of seafloor spreading was supported by numerous evidence including thermal probes that showed that heat flow over the mid-ocean ridges measured up to four times those measured in general bottom sediments, which are taken as due to the presence of molten Earth material close to the ridge crest
The ridge crest also show signs unusually seismic wave velocities that are considered to be due to microfracturing and thermal expansion from upwelling magma
Answer:
C (0 K ) is the coldest possible temperature.
Graphite and diamond come under covalent structure.
The types of bonding are called ionic, molecular covalent, metallic, and network covalent. I’m not sure about the second part of the question.
Answer:
Density = 7.87 grams per mL
Explanation:
Density is given by the formula:
where
Z = effective number of atoms in one unit cell.
M = Molecular mass of the substance
a = edge length of unit cell
Na = Avogadro number = 6.022×10²³
In this case:
Z=2 as it is body-centered type unit cell
M = 56 g per mole for iron
a = 287 pm =
Substituting the above values in the density formula we get:
Density of iron is 7.87 grams per mL.