Chlorine has the smallest atomic radius since the atomic radius decreases as you travel to the right and up
Answer:
B is the best answer for the question
Answer:
i'm pretty sure its B but i may be wrong if you dont wanna take the chance wait for someone
Explanation:
Answer:
v = 3.84 m/s
Explanation:
In order for the riders to stay pinned against the inside of the drum the frictional force on them must be equal to the centripetal force:
![Centripetal\ Force = Frictional\ Force\\\\\frac{mv^2}{r} = \mu R = \mu W\\\\\frac{mv^2}{r} = \mu mg\\\\\frac{v^2}{r} = \mu g\\\\v = \sqrt{\mu gr}](https://tex.z-dn.net/?f=Centripetal%5C%20Force%20%3D%20Frictional%5C%20Force%5C%5C%5C%5C%5Cfrac%7Bmv%5E2%7D%7Br%7D%20%3D%20%5Cmu%20R%20%3D%20%5Cmu%20W%5C%5C%5C%5C%5Cfrac%7Bmv%5E2%7D%7Br%7D%20%3D%20%5Cmu%20mg%5C%5C%5C%5C%5Cfrac%7Bv%5E2%7D%7Br%7D%20%3D%20%5Cmu%20g%5C%5C%5C%5Cv%20%3D%20%5Csqrt%7B%5Cmu%20gr%7D)
where,
v = minimum speed = ?
g = acceleration due to gravity = 9.81 m/s²
r = radius = 10 m
μ = coefficient of friction = 0.15
Therefore,
![v=\sqrt{(0.15)(9.81\ m/s^2)(10\ m)}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B%280.15%29%289.81%5C%20m%2Fs%5E2%29%2810%5C%20m%29%7D)
<u>v = 3.84 m/s</u>
I think they decrease echo and reduce noise, they do this by either absorbing vibrations or by scattering the sound so that echoes arrive at different times rather than reverberating as a standing wave. An echo is a reflection of a sound that arrives at the listener with a delay after the direct sound. The delay is usually proportional to the distance of the reflecting surface from the source and the listener.