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Two satellites, X and Y, orbit the earth. The mass of satellite X is twice that of satellite Y. The orbital radius of satellite Y is twice that of satellite X. What is the ratio of the orbital speed of satellite X to the orbital speed of satellite Y? A) 1:1 B) 1:√2 C) √2:1 D) 2:1 Please...

Hi please help with part i) of this question. Question is attached as image. Full working please. Thanks :)

Would anyone be able to have a look at my creative writing and possibly help with the conclusion?

NSW Bank offers a loan at 9% p.a. with an interest-free period of 3 months, while Sydney Bank offers a loan at 7% p.a. Compare these loans on an amount of $5000 over 3 years and state which bank offers the best loan and why? - In the three month period are they still making repayments?

Hi, I was wondering if anyone had a copy of the 'Surfing: Acidic Environment' textbook and would be able to scan the answer pages through to me. Our chemistry teacher is a dope and does not mark our answers or allow us to look at the answers in the textbook... Thanks :)

im in thanks :)

Alpha Centauri is 4.5 light years away from Earth. a) travelling at 0.1c, calculate how long it would take to get there as measured on earth. b) calculate the time this would represent for the astronauts c) use the length contraction formula to calculate the distance the astronauts travel...

A typical nuclear reaction which releases energy from uranium is: 235U92 + 1n0 -----> 148La57 + 85Br35 + 3(1n0) where mass: 235U92 = 3.904 x10^-25 kg 1n0 = 1.676 x10^-27 kg 148La57 = 2.457 x10^-25 kg 85Br35 = 1.410 x10^-25 kg...

yes, but how do you work out the rest energy with that?

One gram of protons is 6.02x10^23 protons. What is the rest energy of one gram of protons?

Calculate the speed that would cause a length contraction of 15%?

A 100m long Klingon space vessel flies past Saturn at 0.25c. The diameter of Saturn as seen from the Earth is 120 000 km. Calculate: a) its diameter as seen by the Klingons b) the length of the Klingon vessel as seen from Saturn? Please help

Alpha Centauri is 4.5 light years from earth. Imagine a spaceship able to fly at 0.9c. How long would it take to get there as observed by the pilot, and by mission control on earth? I understand that v=0.9c and c=3x10^8 But how do you work out what T or To is by using the 4.5 light years...

With the velocity, do you have to account for the x speed of light part and divide the other side by it? Do you think you could write like a worked example?

Mesons have a life of 2.2μs. However, mesons formed in the upper atmosphere as air particles are hit by cosmic rays take 16μs to reach the ground. Calculate the speed of the meson? I have to use this formula right? t = t0/(1-v2/c2)1/2 Please write in the answer what is: t= t0= v= c=...

Hi, How do we dispose of radioactive wastes? Thanks

Hi guys, I was wondering if anyone has any belonging notes on The Piano or maybe even an essay and would like to send to me :) Thanks :) :)