a. Average speed = distance / total time
distance = 38 meters (going away) + 38 meters (going back)
= 76 meters
total time = 9 seconds (going away) + 1.8 seconds (going
back) = 10.8 seconds
Average speed = 76 meters / 10.8 seconds = 7.04 m/s
b. Average
velocity = displacement / total time <span>
Displacement = Final position – Initial position
Initial position = 0 m
<span>Final position = 0 m (since it gallops back to the trainer)
Displacement = 0 m – 0 m = 0
total time = 10.8 seconds
<span>Average velocity = 0 / 10.8 = 0 m/s</span></span></span>
The correct answer is: Option (D) 6 aluminum and 9 oxygen!
Explanation:
Since the one molecule of aluminium and oxygen is Al2O3 (Aluminum oxide). It has 3 oxygen atoms and 2 aluminium atoms. It find the atoms for the 3 molecules, multiply them with 3.
3 * 3 oxygen atoms = 9 oxygen
3 * 2 aluminum atoms = 6 aluminum ( Option D)
Answer:
A and C
Explanation:
Both have mass and are in motion
A. Disciplined. hope this helped