<span>A point of intersection of three or more edges is a vertex. A polyhedron with two faces (bases) that are congruent and parallel polygons and whose other faces (lateral faces) are parallelograms formed by segments (lateral edges) connecting the corresponding vertices of the bases.</span>
There is mostly plains in the US
Answer: The telecommunications can help facilitate the interaction and information transfer over large distances.
Explanation:
Because telecommunication is also a key element in teamwork, allowing people to collaborate easily from wherever they are located.
Answer:
no. of protons = 39
atomic number = number of protons = 39
number of neutrons = 51
element is Yttrium
Explanation:
given data:
number of electron is 39
mass of atom is 90
We know that atoms are neutral because +ve charged protons is equal to no of -ve charged electrons.
we know that:
atomic number is equal to number of protons,
and atomic mass is the summation of no. of protons and no. of neutrons
number of protons = number of electrons
from the data given:
a) No. of protons = 39 (since number of electrons = protons)
b) atomic number = number of protons = 39
c) number of neutrons = atomic mass - atomic number
= 90 - 39
= 51
d) element is Yttrium
Civilization is about 12000, earth about 4.54 billion years old. 12000/4540000000 is about 2.65*10^-6 or about 0,000265 %. If you compressed the entire existence of our planet