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max2010maxim [7]
3 years ago
15

Which is more expensive to create coal or solar power

Physics
1 answer:
kirill115 [55]3 years ago
3 0
Solar power many be a bit pricey, but it is more efficient than coal and it is better for the environment, coal could be made easily and is cheaper, but Solar power is efficient.
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hram777 [196]

Answer:

v_{2}=3.5 m/s

Explanation:

Using the conservation of energy we have:

\frac{1}{2}mv^{2}=mgh

Let's solve it for v:

v=\sqrt{2gh}

So the speed at the lowest point is v=7 m/s

Now, using the conservation of momentum we have:

m_{1}v_{1}=m_{2}v_{2}

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Therefore the speed of the block after the collision is v_{2}=3.5 m/s

I hope it helps you!

       

8 0
3 years ago
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The first law of thermodynamics says that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.

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The force on the ship is more than a car
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viktelen [127]
Hey mate
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