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avatar+1125 

The period is 1.5 , so it takes [1.5 hours for the satilete to make 1 full orbit around the earth]. The frequency is [1/5], so in 1 h the satellite [ orbits the earth  ]. In 1 day, the satellite goes around Earth [5 ] times.

The amplitude is about [7000], so the satellite is [ at a distance of 7000 from the earth ]. Earth’s radius is [25,484], so the satellite is [ 18,484 kilometers away from earth].

 

 Apr 25, 2019
edited by jjennylove  Apr 25, 2019
 #1
avatar+102943 
+1

The period  = 1.5 hrs

 

The frequency  =  1 / period  =  1 / 1.5   =  2   / 3

 

So...in one hour....the satellite  makes 2/3  of an orbit  [revolution ]

 

In one day.....the satellite  makes  24  / 1.5   =   16 revolutions 

 

The amplitude of the graph is 7000 km......[ 7000 km above the Earth's center ]

 

I don't understand this sentence ..." Earth’s radius is [25,484], so the satellite is [ 18,484 kilometers away from earth]."

 

The Earth's radius in km  =  6371 km.....so.....the max distance that the satellite is above the Earth's surface is  7000 - 6371  = 629 km

 

 

cool cool cool

 Apr 25, 2019
 #2
avatar+1125 
+1

For the last one you were confused on the question told me to take note that the diamter of the earth is 12,742 km .

So i would change it to , Earth’s radius is [6,371], so the satellite is [ 629 km above the Earths surface ]. ? is that better?

 

I was way off calcualtions it would 6,371 since the diameter is 12,742.

jjennylove  Apr 25, 2019
 #3
avatar+102943 
+1

I think that is what you need, Jenny

 

This is a poorly worded question....unless the orbit varies from a circular path....the satellite is ALWAYS 7000km from the Earth's center!!!

 

 

cool cool cool

CPhill  Apr 25, 2019
 #4
avatar+1125 
+1

I agree but I think for this problem that would be accurate. Thanks for your help smiley I have posted another question if maybe you could check it out.

jjennylove  Apr 25, 2019

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