I\'ve got three images showing the Sun rotation from 1/12/16 through 3/22/16, wi

Question

I've got three images showing the Sun rotation from 1/12/16 through 3/22/16, with the time stamp in the lower left-hand corner.

In the images there are 4 solar features noted, labeled A,B,C, and D.  Given the radius of the Sun and the time the feature moves in the video, you are to calculate the velocity (km/s).

Our Sun has differential rotation, so each spot will differ in its speed. This is not computationally difficulty, explain your methodology in detail.

Now each post is going to have a different speed, certain areas have differential rotational it’s not the same speed as if it was a solid it’s a gasket surface so what you need to do is first figure out a scale so you want to open this video on your screen like I have it here and just take a ruler and measure this distance maybe its 10 centimeters it depends on your screen, then convert in Km.

Now noticed at the bottom of the screen here you have a number now this one is kind of hard to read but it’s something like 2016/01/24 and this is at 11:19 this is hours and minutes. So this particular picture was taken from the SoHo satellite at that particular time so if our want to measure how far it goes this particular spot moved the distance and with this timestamp how long it took to move that so say it moved six centimeters . So if it move six centimeters then you know the distance roughly in kilometers because you know once centimeter equals a certain amount of kilometers based on your scale.

So once you know the kilometers then you check at how much time has passed using the time stamp at the bottom here and you get km/s

So that is how you measure km/s for a given spot. Now if you notice on the screen you have four spots that you want measure for as pointed out on the pictures so for those four spots , show in detailed methodology as well as show all your calculations for those four spots want to see how fast those spots will be moving. They are not going to be moving the same as the sun rotates and each one will have a different km/s.

In case the pictures can't be seen, here are the dimensions of each spot. First the diameter of the sun on my screen in 10 cm. Then I measure eanch spot distance from the center of x and y axes. The A spot distance is 3cm on the x axis to the left and 1.2 cm on y axis upward left, since 1/12/2016 to 1/27/2016, at 01:19(time). calculate velocity for spot A. The second spot B is located 3.5cm on x axis to the left and 1.5 on y axis downward left, since 1/12/2016 to 1/27/2016. Calculate the velocity of this spot B. The third spot C is located at 2 cm on x axis to the left and 2 cm on y axis upward left, since 1/12/2016 to 2/10/2016, at 01:19(time). Find the velocity of spot C. And the last spot, D located at 0.5cm on x axis left, and 2.5cm upward left, since 1/12/2016 to 3/14/2016, at 01:19(time). Find velocity of spot D.

Thank you

Here are the immages.I hope this helps. Thank you

Explanation / Answer

Since each point represents different velocities, we have to calculate velocity at all points A,B,C and D.

In figure 1,

so, 1.5 cm from the upper left and 2 cm from the top.

Distance = 15(1.5^2+2^2)1/2

= 15*2.5*93,133 = 3492487.5 km

Time from 1/12/16 to 1/27/2016 (01:19) = 15 days, 1 hour and 19 sec = 1299619 sec

So, velocity at A = 3492487.5 /1299619 = 2.687 km/sec

At B,

distance = 15[1.75^2+2.5^2]1/2 = 15*3.05 cm

= 15*284055.65 = 4260834.75 km

Time = 1299619 sec

So, velocity at B = 4260834.75/1299619 = 3.278 km/sec

At C,

distance = 15[3^2+3.5^2]1/2 = 6439828.75 km

time feom 1/12/2106 to 2/10/2016 = 29 days, 1 hour and 19 sec = 2509219 sec

So, velocity at C = 6439828.75/2509219 = 2.566 km/sec

At D,

distance = 15[4^2+3^2]1/2 = 6984975.00 km

Time from 1/12/2016 to 3/14/2016 = 62 days, 1 hour and 19 sec = 5356819 sec

Velocity at D = 6984975/5356819 =1.304 km/sec

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