NASA pointed the Hubble Space Telescope at a very dark section of sky to see what might be found. The telescope revealed about 10,000 distant and never-before-seen galaxies. NASA would have to make observations of more than 10,000,000

other sections to study the rest of the sky. If every section of sky also looked out on 10,000 galaxies, about how many

galaxies would exist in the known universe?

100,000,000

1,000,000,000

10,000,000,000

100,000,000,000

Hel

100,000,000,000

Explanation:

Given that :

1 hubble space telescope pointed at 1 section of the sky reveals 10,000 distinct galaxies ;

Number of sections from which observation is to be made = 10,000,000

Number of distinct galaxy per section = 10,000

Number of galaxies that would exist in the known universe :

Total number of galaxies in the known universe :

Number of galaxies per section * number of sections

10,000 * 10,000,000

= 100,000,000,000s

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.