Why do telescopes give modern astronomers an advantage over people in the past

Physics

1 answer:

pochemuha4 years ago

6 0

its because it allows modern astronomers the ability to see farther out and more accuratly

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$\huge \bold \red { \underline {levels \: of \: concept}}$

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Which of the following is true when an object of mass m moving on a horizontal frictionless surface hits and sticks to an object

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Answer:

C. The initial momentum should be equal to the final momentum due to the conservation of momentum.

$P_{initial} = mv_0\\P_{final} = (M+m)v_1\\v_1 = \frac{m}{M+m}v_0$

Since m/(M+m) < 1, v_1 > v_0.

Explanation:

Wrong -> A. Since the smaller particle still moves after the collision, it has a kinetic energy.

Wrong -> B. The total initial momentum is equal to the momentum of the smaller particle. Therefore, the momentum of the objects that stuck together is equal to that of the smaller object.

Wrong -> D. Since the bigger object is initially at rest and the surface is frictionless, the direction of motion will be the same as the direction of the smaller particle.

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Explanation:

hope this helps you

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