When you are in free fall, the force of gravity is stronger than your velocity perpendicular to where you're falling, and you move at a constant speed downwards.
Under feelings of weightlessness, you are still being pulled by gravity, but your perpendicular velocity and distance from the source can cancel each other out.
Answer:
Current that reverses direction in the regular pattern is called an alternating current, abbreviated as 'AC'.
Explanation:
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The
sun is a ball of hot gases containing different kinds of elements at different
cores. It has a very high temperature that radiates all throughout the Milky
Way galaxy. The sun has three main parts; photosphere, chromospheres
and corona. The outer core of a star located at the chromospheres contains
mostly of hydrogen. Inside the hydrogen is helium then carbon, oxygen, neon,
magnesium silicon and the inert gas. The photosphere is scattered by the loose electrons in the corona’s plasma.
Hurricane are killing them
As the speed of wave decreases, the wavelength of the wave decreases.
<h3>Refraction</h3>
We know that as a wave travels from one medium to another its speed decreases depending on if the first medium is less dense than the second medium or increases depending on if the first medium is more dense than the second medium. This is known as refraction
Now, we know that the speed of a wave v = fλ where
- f = frequency and
- λ = wavelength. Since f is constant, v ∝ λ.
The ratio of the speed in medium one to speed in medium two is called the refractive index of medium 1 to 2.
<h3>Explaining the diagram</h3>
From the diagram, we see that the wavelength in medium 1 is longer than that in medium 2. Since wavelength and speed are proportional, so the speed in medium 1 is also greater than the speed in medium 2.
So, As the speed of wave decreases, the wavelength of the wave decreases.
Learn more about refraction here:
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