Amateur radio operators in the United States can transmit on several bands. One of those bands consists of radio waves with a wavelength near . Calculate the frequency of these radio waves.

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Amateur radio operators in the United States can transmit on several bands. One of those bands consists of radio waves with a wavelength near 20 m . Calculate the frequency of these radio waves.

frequency of the radio waves is 15 MHz

Explanation:

Given that;

wavelength λ = 20 m

we know that; Speed of light C = 3 × 10⁸ m/s

frequency f = ?

we know that;

frequency f = Speed of light C / wavelength λ

so we substitute

frequency f = (3 × 10⁸m/s) / (20m)

frequency f = 15 × 10⁶ Hz

we also know that 1 Hertz = 0.000001 Megahertz

so

frequency f = 15 × 10⁶ Hz × 0.000001

frequency f = 15 MHz

Therefore frequency of the radio waves is 15 MHz

falling water hydro = water .. spectcular places these plants are

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.