3 years ago

Which statement about the heliocentric theory is correct?

Physics

2 answers:

finlep [7]3 years ago

6 0

Answer:

4 should be right

Explanation:

erik [133]3 years ago

5 0

I think 4 is right but you might want to double check.

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Which evidence supports Wegener's hypothesis? Choose the three that

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I tried to look it up but it was saying that the super climate later broke apart in the sediments have been moving into their current positions ever since

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If two stars in the sky are separated by twice the angle projected by your index and pinky fingers, then how many degrees are th

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Answer:

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Explanation:

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3 years ago

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3 years ago

In midair an M = 145 kg bomb explodes into two pieces of m1 = 115 kg and another, respectively. Before the explosion, the bomb w

Daniel [21]

Answer:

$v_2=-133.17m/s$ , the minus meaning west.

Explanation:

We know that linear momentum must be conserved, so it will be the same before ( $p_i$ ) and after ( $p_f$ ) the explosion. We will take the east direction as positive.

Before the explosion we have $p_i=m_iv_i=Mv_i$ .

After the explosion we have pieces 1 and 2, so $p_f=m_1v_1+m_2v_2$ .

These equations must be vectorial but since we look at the instants before and after the explosions and the bomb fragments in only 2 pieces the problem can be simplified in one dimension with direction east-west.

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$Mv_i=m_1v_1+m_2v_2$

Which means (since we want $v_2$ and $M=m_1+m_2$ ):

$v_2=\frac{Mv_i-m_1v_1}{m_2}=\frac{Mv_i-m_1v_1}{M-m_1}$

So for our values we have:

$v_2=\frac{(145kg)(24m/s)-(115kg)(65m/s)}{(145kg-115kg)}=-133.17m/s$

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3 years ago