1) 
<Solve using the formula which is:
Mass=Density×Volume
2)
3)
(Length × Width × Height)
(Answer=7.5)
Mass=Density×Volume
2)
3)
A demographic tool used to predict a population's future growth is
1 answer:
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Answer:
500 kW
Explanation:
Given that,
Energy of the train, E = 2 MJ = 2×10⁶ J
Time, t = 4 seconds
We need to find the power of the train. We know that,
Power = energy/time
So,
So, the power of the train is equal to 500 kW.