moving,
the sun is a different "observer"
Well, those are good ones. Now how about a <u><em>thermometer</em></u> to <em>measure the temperature</em> ?
Answer:
D, the acceleration of A is twice that of b.
Explanation: in four seconds b got to ten, in two seconds a got to 20. Going 10m/s faster in half the time is going twice the acceleration
PEMDAS which means Parenthesis, Exponet, Multiplication, Division, Addition, and Subtraction.
