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3 years ago

8

the cycle of the moon through its phases, or the synodic month, is a. 21 days long. b. 27 1/3 days long. c. 29 1/2 days long. d.

30 days long.

1 answer:

olasank [31]3 years ago

7 0

It takes 29.5 days long

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The transfer of energy through matter by the direct contact of particles is called __________.

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The transfer of energy through matter by the direct contact of particles is called conduction

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2. What is the mass of an object that has 50000 J

muminat

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Explanation:

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Answer:

a

$l_o =52 \ m$

b

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Explanation:

From the question we are told that

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Here c is the speed of light with value $c = 3.0*10^{8} \ m/s$

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The distance of the star for earth is $d = 145 \ light \ years$

The speed is $v_s = 2.90 *10^{8}$

Generally the from the length contraction equation we have that

$l = l_o \sqrt{1 -[\frac{v}{c } ]}$

Now the when at rest the length is $l_o$

So

$l_o =\frac{l}{\sqrt{ 1 - \frac{v^2}{c^2 } } }$

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Considering b

Applying above equation

$l =l_o \sqrt{1 - [\frac{v}{c } ]}$

Here $l_o =145 \ LY(light \ years )$

So

$l=145 * \sqrt{1 - \frac{v_s^2}{c^2 } }$

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3 years ago

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Answer:

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Explanation:

I hope it will help you

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2 years ago

Read 2 more answers