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Dahasolnce [82]
3 years ago
11

The answer May someone please help me out.

Physics
2 answers:
Olin [163]3 years ago
7 0

magnesium is an element

Andru [333]3 years ago
7 0

It looks like you've already marked the last choice ... 'element'.  If you did, then don't change it.  It's correct.  Anything you find listed on the periodic table is an element.

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A cow wanders 30 m North, turns 22 degrees right of its original path, and wanders another 40 m. Find its total displacement.
scoundrel [369]

Answer:OB=58.3m

Explanation:

So here cow wanders 30m in north and turns 22 degrees in right side and moves 40m more, as shown in figure given.

now take the starting point as a origin such that cow moves in x-y co-ordinate axis.

As shown in figure length OA is the length when cow moves in north or y direction. Later she takes 22 degrees turn to right and moves 40m more.

So the final displacement is the length of cow from the origin that is length OB.

now co-ordinates of B are [40cos22°,40sin22°+30] i.e [37.084,44.984]

now displacement of cow= length of OB

                                           = \sqrt{[37.084]^{2}+[44.984]^{2}  }

                                           =\sqrt{3398.78}

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One astronomer believes that the density of the universe remains constant. One physicist believes that the density of the univer
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