5. Why might it be useful to determine the elements that a planet or moon is made up of?

2 answers:

6 0

One of the main interests in science relating to space, is finding other planets that are similar to Earth (similar atmosphere and can sustain water and in turn the potential of life)

So if we are able to determine composition of the planet, we might be able to see if it can or does have water on it - which could mean life can survive on the planet. Which opens up options of populating another planet, or discovering a new life-form/ living organism.

exis [7]2 years ago

3 0

because we will know more about out solar system

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rusak2 [61]

A small 20-kg canoe is floating downriver at a speed of 2 m/s. 40 J is the canoe’s kinetic energy.

Answer: Option A

<u>Explanation:</u>

The given canoe has the mass and is being given to move at a speed. Therefore the kinetic energy of the canoe can be calculated using the following method,

Given that mass of the canoe = 20 kg and its speed =1 m/s

As we know that the Kinetic energy has the formula,

$\text {Kinetic energy}=\frac{1}{2} \boldsymbol{m} \boldsymbol{v}^{2}$

Therefore, substituting the value into the equation, we get,

$K . E .=\frac{1}{2} \times 20 \times 2^{2}$ = 40 J

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If we assume that the acceleration is constant, we can use on the kinematic equations:

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Why is a control group generally very important in an experiment?

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