<span>Why does sound waves travel faster in solids and liquids than in gas
</span>>>
Gases<span> are the slowest because they are the least dense</span>
We can answer the question by looking at the spectrum of the visible light, for example in this figure:
https://en.wikipedia.org/wiki/Light#/media/File:EM_spectrum.svg
We see from the figure that the lowest part of the spectrum (violet) corresponds approximately to a wavelength of 380 nm, while the highest part of the spectrum (red light) corresponds approximately to a wavelength of 750 nm.
The answer is D obviously as that is unnecessary for the Earth
The force of attraction between the balloon and the rod is 9 x 10⁻³ N.
<h3>
Force of attraction between the balloon and the rod</h3>
The force of attraction between the balloon and the rod is calculated by applying Coulomb's law as shown below;
where;
- r is the distance between the charges
- k is Coulomb's constant = 9 x 10⁹ Nm²/C²
F = (9 x 10⁹) x (2.0 x 10⁻⁸)²/(0.02)²
F = 9 x 10⁻³ N
Thus, the force of attraction between the balloon and the rod is 9 x 10⁻³ N.
Learn more about Coulomb's force here: brainly.com/question/24743340
Explanation:
B = μ₀i/2πr
i = 2πrB/μ₀
∵ 16.50 nano Tesla = 1.65×10⁻⁸ Tesla
∵8.10Km = 8100 m
i = 2(3.14)(8100)(1.65×10⁻⁸)/4×3.14×10⁻⁷
i = 668.25 A
So the current carried up or down the funnel of the tornado is 668.25 A.