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sdas [7]
3 years ago
9

What minimum number of cycles are necessary for the engine to lift a rock of mass 570 kg through a height of 150 m?

Physics
1 answer:
gogolik [260]3 years ago
6 0
5 is the minimum number of cycles necessary for the engine to lift a rock of mass 570 kg
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The universe was 5 percent its current size when light left objects observed now at redshift of ______________
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The redshift of distant galaxy are larger than those of closer galaxies, which indicates that the galaxy is receding at a faster rate.

  • The Universe was 5 percent its current size when light left objects now at redshift of <u>19</u>.

Reasons:

The size of the universe represented as a scale factor with relation to the redshift can be presented as follows;

\displaystyle \frac{a}{a_0}  =\mathbf{ \frac{1}{1 + z}}

Where;

a₀ = The current size of the Universe

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Therefore;

\displaystyle \frac{a}{a_0}  =5\% = 0.05=  \frac{1}{1 + z}

\displaystyle 0.05  = \frac{1}{1 + z}

0.05 + 0.05·z = 1

\displaystyle z = \mathbf{ \frac{1 - 0.05}{0.05} } = 19

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