The question is poorly written.
ALL of the choices cause a change in something.
A). Force causes a change in velocity.
B). and C). Power and energy cause changes requiring work.
D). Impulse causes a change in momentum.
distance d = 5 km = 5 x 1000 m = 5000 m
time taken = 25 minute = 25 x 60 sec = 1500 sec
average velocity V = d/t
V = 5000/1500
V = 3.33 m/s towards east
The answer is to u question is: C
Answer:120.3676
Explanation: using the molecular calculator and molar mass of MgSO4. hope this helps!