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Marizza181 [45]

3 years ago

6

Should we continue to rely on fossils fuels, such as coal, oil, and natural gas, as energy sources? Or, should we invest more in

alternative energy sources, like using solar resources? Support your debate by citing at least 2 advantages that you listed above.
i need help

1 answer:

Dennis_Churaev [7]3 years ago

7 0

Answer:

i`d say energy

Explanation:

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During which phase change does the arrangement of water molecules become the least orderly?

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An object is moving in a straight line at constant speed. A resultant torce begins to act upon

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Answer: The velocity magnitude or the velocity direction chages.

Explanation:

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Which form of energy is due to an object's motion?

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Suppose the block is released from rest with the spring compressed 5.00 cm. The mass of the block is 1.70 kg and the force const

IRISSAK [1]

First, let's calculate the total mechanical energy when the block is at rest and the spring is compressed 5 cm:

$\begin{gathered} ME=PE+KE\\ \\ ME=\frac{kx^2}{2}+\frac{mv^2}{2}\\ \\ ME=\frac{955\cdot0.05^2}{2}+0\\ \\ ME=1.194\text{ J} \end{gathered}$

Now, let's use this total energy to calculate the velocity when the spring is compressed by 2.5 cm:

$\begin{gathered} ME=PE+KE\\ \\ 1.194=\frac{kx^2}{2}+\frac{mv^2}{2}\\ \\ 2.388=955\cdot0.025^2+1.7v^2\\ \\ 1.7v^2=2.388-0.597\\ \\ 1.7v^2=1.791\\ \\ v^2=\frac{1.791}{1.7}\\ \\ v^2=1.0535\\ \\ v=1.026\text{ m/s} \end{gathered}$

Therefore the speed is 1.026 m/s.

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1 year ago

I don’t get how to answer the questions.

Dominik [7]

Write the answer below the question?

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3 years ago