The main responsible for the delay among the atrial and
ventricular contractions is the action potential conduction velocity of the AV
node cells. If the atria and ventricles contract simultaneously, atria cannot
give any help in filling the ventricles, which is needed, especially in those
with stiff ventricles as in the elderly. Hence atria have to contract first and
then the ventricles.
Landfills are harfull to the environment because many substances cannot decompose like styrofoam and all this matter keeps building up but never decomposes
Answer:
B. 0 m
Explanation:
From the position - time graph, the object would have traveled a distance of 0m after 6s.
The graph shows a decrease in distance traveled with increasing time.
- the y - axis is the position of the body
- the x - axis is the the time taken
If we trace up the time taken to the curve, the position will be 0m.
Therefore, the position of the body after 6s is at 0m.
Answer:
Cohesion
Explanation:
The negative and positive sides of water molecules are attracted to each other and cause water to be attracted together and stick together.
This is called cohesion, when molecules of the same type stick together.
