As important as it is to plan ahead,sometimes you

Physics

2 answers:

Natali5045456 [20]3 years ago

5 0

Answer:

B. Cant stop things from going wrong.

Explanation:

To me it's the only reasonable answer...

fiasKO [112]3 years ago

3 0

Can’t stop from things going a different way than how you plan it to be.

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A wave takes 0.5 seconds to complete one cycle. Which characteristic of the wave does this description represent? A. period B. w

trasher [3.6K]

Answer:

period

Explanation:

A wave takes 0.5 seconds to complete one cycle. It is called the time period of the wave. It is the time taken by the wave to complete one cycle.

The relation between the time period and the frequency is given by :

T = 1/f

Where

f is frequency of the wave

Hence, the correct option is (a) "period".

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2 years ago

Which of the following statements best explains why the table of known elements is called the "periodic table"? A. The table is

FromTheMoon [43]

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3 years ago

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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: