Answer:
The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
The answer is A. Polarized in a vertical plane
If positioned correctly, a polarized lenses can block all reflected light from horizontal surface such as road
Answer:

Explanation:
Solving Equations by Isolation
We have this equation:

Let's solve it for w step by step. First, we flip both sides

Subtracting 2Lh in both sides

Simplifying

Factoring w

Dividing by (4l+6H)

Simplifying by 2:

Answer:
Explanation:
Six waves passes by under 60second interval
Since it has 6 waves,
Then, it correspond to 3 wavelength
Then,
The period of each Each wavelength is 60 / 3
Then, period = 20seconds
From the relationship between frequency and period
f = 1 / T
f = 1 / 20
f = 0.05 Hz
No it is not an element, it is a compound(two ore more elements bound together). It is one Oxygen and two Hydrogen bound together by covalent bonds.