Answer:
Professor Hawking had just turned 21 when he was diagnosed with a very rare slow-progressing form of ALS, a form of motor neurone disease (MND). He was at the end of his time at Oxford when he started to notice early signs of his disease. He was getting more clumsy and fell over several times without knowing why.
Explanation:
none
Speed is constant. 50 miles = 1 hour. 600/50 = 12. 1hr(12) = 12 hours.
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I believe it is D. Earth spinning on it's axis.
Mechanical advantage is the ratio of output force to input force of a machine.
hope this helps and have a great day :)
