The doppler effect, when used with light, produces a shift of frequencies to red. Well, no matter which direction you look, there is a shift to red! That means that the universe is expanding or moving away from us in every direction. The idea, is that this could only happen if all matter was once in a single point, and there was an explosion. This explosion from a single point is called the big bang theory.
A nebula is a cloud of gases that can coagulate to become a new star.
phsical<em> </em><em>c</em><em>h</em><em>a</em><em>n</em><em>g</em><em>e</em><em> </em><em>i</em><em>s</em><em> </em><em>a</em><em> </em><em>c</em><em>h</em><em>a</em><em>n</em><em>g</em><em>e</em><em> </em><em>o</em><em>f</em><em> </em><em>m</em><em>a</em><em>t</em><em>t</em><em>e</em><em>r</em><em> </em><em>i</em><em>n</em><em> </em><em>w</em><em>h</em><em>i</em><em>c</em><em>h</em><em> </em><em>n</em><em>o</em><em> </em><em>n</em><em>e</em><em>w</em><em> </em><em>s</em><em>u</em><em>b</em><em>s</em><em>t</em><em>a</em><em>n</em><em>c</em><em>e</em><em> </em><em>i</em><em>s</em><em> </em><em>f</em><em>o</em><em>r</em><em>m</em><em>e</em><em>d</em><em> </em><em>b</em><em>u</em><em>t</em><em> </em><em>i</em><em>n</em><em> </em><em>c</em><em>h</em><em>e</em><em>m</em><em>i</em><em>c</em><em>a</em><em>l</em><em> </em><em>c</em><em>h</em><em>a</em><em>n</em><em>g</em><em>e</em><em> </em><em>n</em><em>e</em><em>w</em><em> </em><em>s</em><em>u</em><em>b</em><em>s</em><em>t</em><em>a</em><em>n</em><em>c</em><em>e</em><em> </em><em>a</em><em>r</em><em>e</em><em> </em><em>f</em><em>o</em><em>r</em><em>m</em><em>e</em><em>d</em>
Answer:
A story that might be a good human interest story would be the vaccines for corona. Everyone these days are waiting desperately for corona to end. Talking about a vaccine might give them hope, and it would be nice to see how the scientist and doctors truly care for the people. Maybe encourage them to wear the masks until the vaccines come out?
Answer:
D. It goes through incomplete metamorphosis.
Explanation:
Damselflies do not hide away inside a pupa to transform into their adult form. Instead, they shed their skin several times as they grow, changing shape a little each time. <em><u>This process is called incomplete metamorphosis</u></em><em><u>.</u></em>
Answer:
(3) 4 cm' and 2.0 g/cm3
Explanation:
Given:
volume= V= 8 cm³
mass= m= 16 g
The density is the mass per volume of a substance, so the density of the rock is:
density= d= 16 g/8 cm³= 2 g/cm³
When we cut the rock in half, we have a half volume and a half mass:
V= 8 cm³/2= 4 cm³
m= 16 g/2= 8 g
But the density is not altered because it is an intrisic property - it does not change with the amount of subtance. Thus, the density of a half rock is:
d = m/V= 8 g/4 cm³= 2 g/cm³
