<u>Answer:</u>
<em>Anytime observations need to be clarified. When an unusual condition need to be shown for later reference.</em>
<u>Explanation:</u>
Instead of just recording the data the is sometimes important to be sketched out as the data observed is needed to be clarified and also sometimes there is an unusual condition that occurs and hence, it is important to sketch it so that it can be used for later reference.
<em>Therefore, when we are aware of the situation we need not sketch the data.</em>
In physical science, pressure quantifies the amount of force that is applied at a certain area. Mathematically, this can be transformed as,
Pressure = Force / Area
It is also to be noted that force is the product of mass and acceleration due to gravity.
Force = mass x acceleration due to gravity
Substituting,
Force = (350 kg) x (9.8 m/s²)
Force = 3430 N
Then, substitute this to the first equation,
Pressure = 3430 N / 1m²
<em>ANSWER: Pressure = 3430 N/m² = 3430 Pa</em>
Hydroelectric energy
Explanation:
In a dam area, the most likely energy resource would be an hydro-electric energy source.
Here the dammed water is used to produce electricity by forcing turbines to rotate.
- Hydroelectric power stations are sited near huge water bodies especially a dam.
- The moving water is used to drive heavy turbines that been designed to move electricity.
- An area with huge amount of water has immense potential to generate hydroelectric power.
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They increased their sizes to rejuvenate the land. Before the war, everyone left their farms to go to the war. And once the war was over, the farms increased in size due to the high demand of resources needed to recover from the war.
