Answer:
Its momentum thats linear
Explanation:
from my secret analysis i would say this is really linear
Answer:
a physical change
Explanation:
after the water turns to ice, it will melt and became water again making which means it's reversible this being. a physical change
With constant angular acceleration
, the disk achieves an angular velocity
at time
according to
![\omega=\alpha t](https://tex.z-dn.net/?f=%5Comega%3D%5Calpha%20t)
and angular displacement
according to
![\theta=\dfrac12\alpha t^2](https://tex.z-dn.net/?f=%5Ctheta%3D%5Cdfrac12%5Calpha%20t%5E2)
a. So after 1.00 s, having rotated 21.0 rad, it must have undergone an acceleration of
![21.0\,\mathrm{rad}=\dfrac12\alpha(1.00\,\mathrm s)^2\implies\alpha=42.0\dfrac{\rm rad}{\mathrm s^2}](https://tex.z-dn.net/?f=21.0%5C%2C%5Cmathrm%7Brad%7D%3D%5Cdfrac12%5Calpha%281.00%5C%2C%5Cmathrm%20s%29%5E2%5Cimplies%5Calpha%3D42.0%5Cdfrac%7B%5Crm%20rad%7D%7B%5Cmathrm%20s%5E2%7D)
b. Under constant acceleration, the average angular velocity is equivalent to
![\omega_{\rm avg}=\dfrac{\omega_f+\omega_i}2](https://tex.z-dn.net/?f=%5Comega_%7B%5Crm%20avg%7D%3D%5Cdfrac%7B%5Comega_f%2B%5Comega_i%7D2)
where
and
are the final and initial angular velocities, respectively. Then
![\omega_{\rm avg}=\dfrac{\left(42.0\frac{\rm rad}{\mathrm s^2}\right)(1.00\,\mathrm s)}2=42.0\dfrac{\rm rad}{\rm s}](https://tex.z-dn.net/?f=%5Comega_%7B%5Crm%20avg%7D%3D%5Cdfrac%7B%5Cleft%2842.0%5Cfrac%7B%5Crm%20rad%7D%7B%5Cmathrm%20s%5E2%7D%5Cright%29%281.00%5C%2C%5Cmathrm%20s%29%7D2%3D42.0%5Cdfrac%7B%5Crm%20rad%7D%7B%5Crm%20s%7D)
c. After 1.00 s, the disk has instantaneous angular velocity
![\omega=\left(42.0\dfrac{\rm rad}{\mathrm s^2}\right)(1.00\,\mathrm s)=42.0\dfrac{\rm rad}{\rm s}](https://tex.z-dn.net/?f=%5Comega%3D%5Cleft%2842.0%5Cdfrac%7B%5Crm%20rad%7D%7B%5Cmathrm%20s%5E2%7D%5Cright%29%281.00%5C%2C%5Cmathrm%20s%29%3D42.0%5Cdfrac%7B%5Crm%20rad%7D%7B%5Crm%20s%7D)
d. During the next 1.00 s, the disk will start moving with the angular velocity
equal to the one found in part (c). Ignoring the 21.0 rad it had rotated in the first 1.00 s interval, the disk will rotate by angle
according to
![\theta=\omega_0t+\dfrac12\alpha t^2](https://tex.z-dn.net/?f=%5Ctheta%3D%5Comega_0t%2B%5Cdfrac12%5Calpha%20t%5E2)
which would be equal to
![\theta=\left(42.0\dfrac{\rm rad}{\rm s}\right)(1.00\,\mathrm s)+\dfrac12\left(42.0\dfrac{\rm rad}{\mathrm s^2}\right)(1.00\,\mathrm s)^2=63.0\,\mathrm{rad}](https://tex.z-dn.net/?f=%5Ctheta%3D%5Cleft%2842.0%5Cdfrac%7B%5Crm%20rad%7D%7B%5Crm%20s%7D%5Cright%29%281.00%5C%2C%5Cmathrm%20s%29%2B%5Cdfrac12%5Cleft%2842.0%5Cdfrac%7B%5Crm%20rad%7D%7B%5Cmathrm%20s%5E2%7D%5Cright%29%281.00%5C%2C%5Cmathrm%20s%29%5E2%3D63.0%5C%2C%5Cmathrm%7Brad%7D)
When I went through with the math, the answer I came upon was:
<span>6.67 X 10^14 </span>
<span>Here is how I did it: First of all we need to know the equation. </span>
<span>c=nu X lamda </span>
<span>(speed of light) = (frequency)(wavelength) </span>
<span>(3.0 X 10^8 m/s) = (frequency)(450nm) </span>
<span>We want the answer in meters so we need to convert 450nm to meters. </span>
<span>450nm= 4.5 X 10^ -7 m </span>
<span>(3.0 X 10^8 m/s) = (frequency)(4.5 X 10^ -7 m) </span>
<span>Divide the speed of light by the wavelength. </span>
<span>(3.0 X 10^8m/s) / (4.5 X 10^ -7m) =6.67 X 10^ 14 per second or s- </span>
<span>Answer: 6.67 X 10^14 s- hope this helps</span>