Most likely it would be C not completely sure
Oml... Its physical... Unless if your turning that wheat into bread by using fire it would be chemical.
Yeeeeeeeetus
a boulder can change due to erosion and weathering. it can change shape and sometimes color, possibly.
Answer:
The time it can operate between chargins in minutes is
![t=102.8 minutes](https://tex.z-dn.net/?f=t%3D102.8%20minutes)
Explanation:
Given:
,
, ![w=200\pi rad/s](https://tex.z-dn.net/?f=w%3D200%5Cpi%20rad%2Fs)
a). The rotational kinetic energy
![K_R=\frac{1}{2}*I*w^2](https://tex.z-dn.net/?f=K_R%3D%5Cfrac%7B1%7D%7B2%7D%2AI%2Aw%5E2)
![I=\frac{1}{2}*m*r^2](https://tex.z-dn.net/?f=I%3D%5Cfrac%7B1%7D%7B2%7D%2Am%2Ar%5E2)
![I=\frac{1}{2}*500kg*(1.0m)^2](https://tex.z-dn.net/?f=I%3D%5Cfrac%7B1%7D%7B2%7D%2A500kg%2A%281.0m%29%5E2)
![I=250 kg*m^2](https://tex.z-dn.net/?f=I%3D250%20kg%2Am%5E2)
![K_R=\frac{1}{2}*250kg*m^2*(200\pi rad/s)^2](https://tex.z-dn.net/?f=K_R%3D%5Cfrac%7B1%7D%7B2%7D%2A250kg%2Am%5E2%2A%28200%5Cpi%20rad%2Fs%29%5E2)
![K_R=49.348x10^6J](https://tex.z-dn.net/?f=K_R%3D49.348x10%5E6J)
b). The power average 0.8kW un range time can be find
![P=\frac{K_R}{t'}](https://tex.z-dn.net/?f=P%3D%5Cfrac%7BK_R%7D%7Bt%27%7D)
Solve to t'
![t=\frac{K_R}{P}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7BK_R%7D%7BP%7D)
![t=\frac{49.348x10^6}{0.8x10^3w}=6168.5s](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B49.348x10%5E6%7D%7B0.8x10%5E3w%7D%3D6168.5s)
![t=6168.5s\frac{1minute}{60s}=102.8 minutes](https://tex.z-dn.net/?f=t%3D6168.5s%5Cfrac%7B1minute%7D%7B60s%7D%3D102.8%20minutes)
Because you would fall so slow that you would not need one.