I think the answer may be D- mechanical
"Circulatory system" does that, as all about transportation of blood within the body comes under it's work
Hope this helps!
Answer:
1000m/s²
Explanation:
Given parameters:
Initial velocity = 6000m/s
Final velocity = 11000m/s
Time = 50s
Unknown:
Acceleration of the plane = ?
Solution:
Acceleration is the rate of change of velocity with time:
Acceleration = (final velocity - starting velocity) ÷ time
Therefore;
Acceleration =
= 1000m/s²
8:B) Again, sound travels faster in solids
9:D) There is no particles for the sound to travel faster
10:D) The speed of light never changes the only thing that makes light change is when it travels through objects of different densities.