Answer:
1)SI is coherent system of units
2) SI is rational system of units
Third model shows how a comet's tail changes during its orbit...
mark brainliest
This is correct, I just did the test. Yes, displacement is 45 meters, elapsed time is three seconds, and the direction is toward the goal.
Answer:

Explanation:
From the Question We are told that
Initial Force 
Final Force 
Distance between the front and rear wheels \triangle x=3.20 m
Since

Therefore


Generally the equation for The center of mass is at x_2 is mathematically
given by




It depends on the direction in which the shell is launched. The time can be anything from 3.6 seconds to never.