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3 years ago

Which process best describes part of a scientific investigation?

Physics

2 answers:

bazaltina [42]3 years ago

7 0

Answer:

The correct answer will be option-C

Explanation:

A scientific investigation is a systematic approach to explain and understand the natural events of nature.

The investigation is based on the scientific method which begins with making an observation, asking a question, background research and formation of a hypothesis.

After the formation of a hypothesis, an experiment is performed to test the hypothesis on the basis of which results or solution is recorded. The record results are then analysed and evaluated on the basis of which conclusions are drawn.

Since evaluation or analysis of the results is a step followed during the scientific method therefore, option-c is the correct answer.

lara31 [8.8K]3 years ago

5 0

the answer is c because it is the 3rd step in the scientific analysis steps

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3 years ago

What would be the escape speed for a craft launched from a space elevator at a height of 54,000 km?

Natasha_Volkova [10]

Answer: 3.63 km/s

Explanation:

The escape velocity equation for a craft launched from the Earth surface is:

$V_{e}=\sqrt{\frac{2GM}{R}}$

Where:

$V_{e}$ is the escape velocity

$G=6.67(10)^{-11} Nm^{2}/kg^{2}$ is the Universal Gravitational constant

$M=5.976(10)^{24}kg$ is the mass of the Earth

$R=6371 km=6371000 m$ is the Earth's radius

However, in this situation the craft would be launched at a height $h=54000 km=54000000 m$ over the Eart's surface with a space elevator. Hence, we have to add this height to the equation:

$V_{e}=\sqrt{\frac{2GM}{R+h}}$

$V_{e}=\sqrt{\frac{2(6.67(10)^{-11} Nm^{2}/kg^{2})(5.976(10)^{24}kg)}{6371000 m+54000000 m}}$

Finally:

$V_{e}=3633.86 m/s \approx 3.63 km/s$

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2 years ago

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2 years ago

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3 years ago

Read 2 more answers

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Work formula:
W = F * d
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F 2 = 30 N; d 2 = 6 m.
W ( Cindy ) = 40 * 6 = 240 Nm
W ( Andy ) = 30 * 6 = 180 Nm
The difference of their amounts if work:
240 Nm - 180 Nm = 60 nm

hope it helps!

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2 years ago