Answer:
electromagnetic radiation hopefully
Answer:

Explanation:
here it is given that the crate is sliding down with constant speed
so we will have

now we can say

so here we have
a = 0
now from Newton's II law we can say that sum of all forces on the system is always product of mass and its acceleration
so here we will have


Mathematically, to compute for the wavelength, λ, we have

where v is the velocity and f is the frequency.
As we can see here, given that velocity is constant, wavelength increases as frequency decreases. This shows that wavelength is inversely proportional to frequency.
Answer: Wavelength and frequency are inversely related to each other.
A wheely because you see when you push it it has the scwers stong