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photoshop1234 [79]

3 years ago

12

The life cycle of a star begins with a cloud of gas and dust called a ________.

2 answers:

Dahasolnce [82]3 years ago

6 0

<span>The life cycle of a star begins with a cloud of gas and dust called a Nebula
.</span>

mr_godi [17]3 years ago

6 0

I think the correct answer is nebula. The life cycle of a star begins with a cloud of gas and dust called a nebula. It is a cloud of gas which is visible in the night sky as an indistinct bright patch. Hope this answers the question. Have a nice day.

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Before colliding, the momentum of block A is -100 kg*m/, and block B is -150 kg*m/s. After, block A has a momentum -200 kg*m/s.

rjkz [21]

Answer:

Momentum of block B after collision = $-50\ kg\ ms^{-1}$

Explanation:

Given

Before collision:

Momentum of block A = $p_{A1}$ = $-100\ kg\ ms^{-1}$

Momentum of block B = $p_{B1}$ = $-150\ kg\ ms^{-1}$

After collision:

Momentum of block A = $p_{A2}$ = $-200\ kg\ ms^{-1}$

Applying law of conservation of momentum to find momentum of block B after collision $p_{B2}$ .

$p_{A1}+p_{B1}=p_{A2}+p_{B2}$

Plugging in the given values and simplifying.

$-100-150=-200+p_{B2}$

$-250=-200+p_{B2}$

Adding 200 to both sides.

$200-250=-200+p_{B2}+200$

$-50=p_{B2}$

∴ $p_{B2}=-50\ kg\ ms^{-1}$

Momentum of block B after collision = $-50\ kg\ ms^{-1}$

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