The flow of Direct current (DC) is constant and flows in one direction. Most digital electronics make use of DC. Alternating current (AC) periodically flows in reverse and is mostly used to deliver power to houses, buildings and the like. With that alone, you can already rule out A, C and D.
The answer would then be B. constant, periodically reversing.
A group of students toured a limestone cave in northwest Georgia.
Which of these best explains how the limestone caves in Georgia were formed?
A. Plant roots split the rock.
B. Acidic water dissolved the rock.
C. Animals burrowed into the rock.
D. Ice formed and broke up the rock.
Answer:
im pretty sure the answer is c please mark me brainliest
It was developed through Democritus who was a greek philosopher.
Hope this helps
Answer:
![v=33.764m/s](https://tex.z-dn.net/?f=v%3D33.764m%2Fs)
Explanation:
Given data
Mass m=1.2 g=0.0012 kg
diameter d=0.76 m
Friction Force F=3.6 N
To find
Velocity v
Solution
From the Centripetal force we know that
![F_{c}=\frac{mv^{2} }{r}](https://tex.z-dn.net/?f=F_%7Bc%7D%3D%5Cfrac%7Bmv%5E%7B2%7D%20%7D%7Br%7D)
Where m is mass
v is velocity
r is radius
Substitute the given values to find velocity v
So
![F_{c}=\frac{mv^{2} }{r}\\v^{2}=\frac{F_{c}(r)}{m}\\ v=\sqrt{\frac{F_{c}(r)}{m}}\\ v=\sqrt{\frac{F_{c}(diameter/2)}{m}}\\v=\sqrt{\frac{(3.6N)(0.76/2)m}{(0.0012kg)}}\\v=33.764m/s](https://tex.z-dn.net/?f=F_%7Bc%7D%3D%5Cfrac%7Bmv%5E%7B2%7D%20%7D%7Br%7D%5C%5Cv%5E%7B2%7D%3D%5Cfrac%7BF_%7Bc%7D%28r%29%7D%7Bm%7D%5C%5C%20v%3D%5Csqrt%7B%5Cfrac%7BF_%7Bc%7D%28r%29%7D%7Bm%7D%7D%5C%5C%20v%3D%5Csqrt%7B%5Cfrac%7BF_%7Bc%7D%28diameter%2F2%29%7D%7Bm%7D%7D%5C%5Cv%3D%5Csqrt%7B%5Cfrac%7B%283.6N%29%280.76%2F2%29m%7D%7B%280.0012kg%29%7D%7D%5C%5Cv%3D33.764m%2Fs)