The water in glass S had the most heat
the water in glass P has the least heat
<span> Mass is a quantified value of how much matter is in you, while weight takes into account the effect of gravity. People will "weigh" less on the moon because of the lesser gravity, but they still have the same mass.</span>
Answer:
Part a)
When rotated about the mid point
![\tau = 0.021Nm](https://tex.z-dn.net/?f=%5Ctau%20%3D%200.021Nm)
Part b)
When rotated about its one end
![\tau = 0.042 Nm](https://tex.z-dn.net/?f=%5Ctau%20%3D%200.042%20Nm)
Explanation:
As we know that the angular acceleration of the rod is rate of change in angular speed
so we will have
![\alpha = \frac{\Delta \omega}{\Delta t}](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%5Cfrac%7B%5CDelta%20%5Comega%7D%7B%5CDelta%20t%7D)
![\alpha = \frac{2.4 - 0}{3.6}](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%5Cfrac%7B2.4%20-%200%7D%7B3.6%7D)
![\alpha = 0.67 rad/s^2](https://tex.z-dn.net/?f=%5Calpha%20%3D%200.67%20rad%2Fs%5E2)
Part a)
When rotated about the mid point
![I = 2mr^2](https://tex.z-dn.net/?f=I%20%3D%202mr%5E2)
![I = 2(0.48)(0.18)^2](https://tex.z-dn.net/?f=I%20%3D%202%280.48%29%280.18%29%5E2)
![I = 0.0311 kg m^2](https://tex.z-dn.net/?f=I%20%3D%200.0311%20kg%20m%5E2)
now torque is given as
![\tau = 0.0311 (0.67)](https://tex.z-dn.net/?f=%5Ctau%20%3D%200.0311%20%280.67%29)
![\tau = 0.021Nm](https://tex.z-dn.net/?f=%5Ctau%20%3D%200.021Nm)
Part b)
When rotated about its one end
![I = m(2r)^2](https://tex.z-dn.net/?f=I%20%3D%20m%282r%29%5E2)
![I = (0.48)(0.36)^2](https://tex.z-dn.net/?f=I%20%3D%20%280.48%29%280.36%29%5E2)
![I = 0.0622 kg m^2](https://tex.z-dn.net/?f=I%20%3D%200.0622%20kg%20m%5E2)
now torque is given as
![\tau = (0.0622)(0.67)](https://tex.z-dn.net/?f=%5Ctau%20%3D%20%280.0622%29%280.67%29)
![\tau = 0.042 Nm](https://tex.z-dn.net/?f=%5Ctau%20%3D%200.042%20Nm)
There's no way to tell for sure which plant will grow faster, because
we don't know if a plant gets any benefit from red light.
But we do know for sure that it won't be the one we shine green light on.
We know that green light is no use to green plants at all ... that's why
when green light falls on them, they don't even bother absorbing it.
They just let it bounce off, and that's why they look green to us.