Answer:
0.84
Explanation:
m = Massa balok
g = Percepatan gravitasi
= Sudut kemiringan
= Koefisien gesekan statik antara balok dan bidang miring
Gaya balok karena beratnya diberikan oleh
![F=mg\sin\theta](https://tex.z-dn.net/?f=F%3Dmg%5Csin%5Ctheta)
Gaya gesekan diberikan oleh
![f=\mu mg\cos\theta](https://tex.z-dn.net/?f=f%3D%5Cmu%20mg%5Ccos%5Ctheta)
Kondisi dimana balok mulai bergerak adalah ketika gaya balok akibat beratnya sama dengan gaya gesek pada balok.
![mg\sin\theta=\mu mg\cos\theta\\\Rightarrow \mu=\dfrac{mg\sin\theta}{mg\cos\theta}\\\Rightarrow \mu=\tan\theta\\\Rightarrow \mu=\tan40^{\circ}\\\Rightarrow \mu=0.84](https://tex.z-dn.net/?f=mg%5Csin%5Ctheta%3D%5Cmu%20mg%5Ccos%5Ctheta%5C%5C%5CRightarrow%20%5Cmu%3D%5Cdfrac%7Bmg%5Csin%5Ctheta%7D%7Bmg%5Ccos%5Ctheta%7D%5C%5C%5CRightarrow%20%5Cmu%3D%5Ctan%5Ctheta%5C%5C%5CRightarrow%20%5Cmu%3D%5Ctan40%5E%7B%5Ccirc%7D%5C%5C%5CRightarrow%20%5Cmu%3D0.84)
Koefisien gesekan statik antara balok dan bidang miring adalah 0.84.
<span>So we want to know what statement is an accurate description of vibrations. So humans can hear sound frequencies from 20-20000 Hz. Below 20 Hz is infra sound and above 20000 Hz is ultra sound. Humans cant hear both infra sound and ultra sound so the correct answer is A.</span>
I believe it’s a liquid inside a beaker on a hot Bunsen burner (c)
This is because : Everyday Examples of Convection
Boiling water - The heat passes from the burner into the pot, heating the water at the bottom. Then, this hot water rises and cooler water moves down to replace it, causing a circular motion. Radiator - Puts warm air out at the top and draws in cooler air at the bottom.
Not sure if it’s right tho!
What are the options u can't say that and expect me to know wat u talkin bout
Answer:
"where crests and troughs have their maxima at the same time"
Crests and troughs are 180 deg out of phase and when they have their maxima at the same time and place, their net contribution will be zero"