Answer:

Therefore, highest point that the cannon ball reaches is 168.7m
Explanation:
the cannon is fired at an angle 30 o to the horizonatal with a speed of 155 m/s
highest point that the cannon ball reaches?

g = 9.8m/s2

Therefore, highest point that the cannon ball reaches is 168.7m
Answer:
organisms eat food because they will die if they don't, just like us humans. their bodies wont be able to run if they do not have a energy supply. the energy supply for every organism is food. this is why organisms eat food.
Answer:
Explanation:Advatages
1..Its takes precise reading accurate
2. it is moveable because of its small weight
3.It is easy to read and can be kept inside water
Disadvantages
1. It breaks easily because of its small size
2. If broken there can be risk of exposure to mercury chemicals.