Answer:
a= 17.69 m/s^2
Explanation:
Step one:
given data
A car accelerates uniformly from rest to 23 m/s
u= 0m/s
v= 23m/s
distance= 30m
Step two:
We know that
acceleration= velocity/time
also,
velocity= distance/time
23= 30/t
t= 30/23
t= 1.30 seconds
hence
acceleration= 23/1.30
accelaration= 17.69 m/s^2
Answer:
Neptune has the longest duration of retrograde motion as viewed from Earth.
Mars has the shortest duration of retrograde motion as viewed from Earth.
Explanation:
The planets move along the space from west to east, although this movement is interrupted for brief intervals by a retrograde movement from east to west.
Retrogradation occupies a small part of the planet's motion that normally develops directly. The durations of retrogradation for the planets are: Mercury 23 days, Venus 42 days, Mars 73 days, Jupiter 123 days, Saturn 138 days, Uranus 151 days and Neptune 158 days.
Answer:
505929 AU
Explanation:
As you may know, one light-year is equivalent to approximately 63241.1 Astronomical Units. To get your answer, simply multiply 63241.1 * 8 to get ≈505929 AU
If the scientist repeats the experiment over and over and gets the same results. Also if the scientist peer reviews the experiment to make sure there is no bias in his or her results.