A reference point would be something not on the ship which could be used to calculate distance traveled.
Answer: C.) A lighthouse on a nearby Island
The thickness of the ozone layer (for earth) and the atmosphere.
Mercury is the closest planet to the sun but it isn’t the hottest because it has no atmosphere. Although Venus is the second planet from the sun, it is the hottest because of it’s thick atmosphere and the clouds that trap heat in.
I believe the coma is formed from the dust and gas from a comet.
Hope this helps!! :)
If its uniform there is no force.
C) 0 N
Acceleration = change in velocity/change in time
So you should have (20-10)/(0-2)= -10/2 = -5
So your answer is -5