http://www.ocr.org.uk/Images/61757-question-paper-unit-g484-the-newtonian-world.pdfhttp://www.ocr.org.uk/images/64639-mark-scheme-unit-g484-the-newtonian-world-january.pdfQuestion 6c)
If i use the full answer from b which is 2.277x10^-20
Ill get 2461.8 m/s
roughly = 2.5km/s
They used the round answer...
So i wouldnt get the marks then?
Also
3aii) Explain why these satellites orbit above equator
Answer: so they stay above same point at all times
Like what?
Shouldn't it be because only at the equator time period = 24hours.
4aii)
Suggest 2 possible reasons why actual increase will be much lower than estimate?
Answer: Heat lost to structure of greenhouse
Heat lost to surroundings
THEY MEAN THE SAME THING!
For 6d)
Is it not correct to say gravitational field strength at the upper atmosphere is much weaker than at the surface of earth.
11km/s is for an object at the surface of earth.
Temp at upper atmosphere is 1100k, therefore provided KE for helium molecules.
I cant see any where on earths surface being 1100K so how could hedlium atoms escape from surface?