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egoroff_w [7]
3 years ago
13

What does it mean to say that scientific models are open to change?

Physics
2 answers:
seraphim [82]3 years ago
6 0

Answer:

B.Scientific models can be adjusted when new information is found.

Explanation:

please mark me the best

Natalija [7]3 years ago
4 0

Answer:

B

Explanation:

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engineers are using computer models to study train collisions design safer train cars. They start by modeling an elastic collisi
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The final velocity of the second car is 57 m/s south.

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The formula to apply is :

m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f

where ;

m_1=mass of object 1\\v_1i=initial  velocity object1\\m_2=mass of object2\\v_2i=initial velocity object 2\\v_1f=final velocity object 1\\v_2f=final velocity object 2

Given in the question that;

m_1=14650kg\\v_1i=18m/s\\m_2=3825kg\\v_2i=11m/s\\v_1f=6m/s\\v_2f=?

Apply the formula as;

m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f

{14650*18}+{3825*11} = {14650 *6} + {3825 * v₂f}

263700+42075=87900 + 3825v₂f

305775 =87900 + 3825v₂f

305775-87900 = 3825v₂f

217875=3825v₂f

217875/3825 =v₂f

56.96 = v₂f

<u>57 m/s = v₂f { nearest whole number}</u>

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