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Bogdan [553]
3 years ago
14

What causes the phases of the moon as seen from earth?

Physics
2 answers:
adelina 88 [10]3 years ago
5 0

Answer:

a. light from the sun reflects off the moon as it orbits earth.  

Explanation:

Moon does not have its own light, it reflects the sunlight falling on it. Phases of moon are the different shapes of the moon that we see. There are mainly 5 phases of moon: New moon, Crescent, Half moon, gibbous and full moon. These shapes are due to the illuminated portion of the moon (by the Sun) that is visible from the Earth.

Thus, option a is correct.

enyata [817]3 years ago
4 0
A ~~~~~~~~~~~~~~~~~~~~~~`
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How many position coordinates are required to identify the position of a system undergoing one-dimensional motion? What symbol s
gregori [183]
One-dimensional motion can be plotted through the Cartesian plane which has a coordinates of (x,y). These coordinates are the abscissa and ordinates. Since, there are two coordinates, the answer to the second item is two.

The symbol that can be used to identify systems position is (x,y). Since this is one dimensional motion, it is possible that one of the two coordinates becomes zero. 
6 0
3 years ago
If a man does 4500 J of work from a high rise building of 10 m, what is his mass?
GalinKa [24]

Explanation:

The potential energy (Ep) = 4500 J

Ep = m. g. h

=> m = Ep/(g.h)

m = 4500/(10×10)

= 4500/100

= 45

so, the mass = 45 kgs

4 0
2 years ago
Read 2 more answers
You attach a 2.90 kg mass to a horizontal spring that is fixed at one end. You pull the mass until the spring is stretched by 0.
Murljashka [212]

Answer:

Explanation:

The spring is stretched by .5 m and then released that means its amplitude of oscillation A is 0.5 m .

A = 0.5 m

After the release at one extreme point , the mass comes to rest again at another extreme point after half the time period ie

T / 2 = .3 s

T = 0.6 s

Angular velocity

ω = \frac{2\times \pi}{T}

ω = \frac{2\times \pi}{0.6}

ω = 10.45

Maximum velocity  = ω A

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Maximum velocity  = 10.45 x .5

= 5.23 m /s

7 0
3 years ago
. A new programming language requires variable names to start with a letter (upper or lowercase), which can be followed by lette
cupoosta [38]

Answer:

Explanation:

Total letters available on the keyboard = 26

Doubling this amount to account for both upper and lower case letters.

Therefore, Total characters (Upper + Lower Case) = 52 characters

Total numbers on keyboard (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) = 10 characters

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Thus, Total allowed characters = 52 + 10 + 1 = 63

This is a problem of the permutation as order of the characters results in a different name.

Our file name should be of atleast 3 and smaller than 7 (i.e. 6) characters

Therefore, total possible permutations can be obtained by subtraction permutation of 2 characters from the permutations of 6 characters.

Total\; Permutations\; =\; (^{63}P_{6}) \;-\;(^{63}P_{2}) \\\\Total\; Permutations\; =\;48920775120\;-\;3906\\\\Total\; Permutations\; =\;48920771214

7 0
2 years ago
Read 2 more answers
Which of the following is an x-intercept of the function below
Assoli18 [71]

Answer:

Intercepts occur at    x = 1, y = 0

                                   x = 3, y = 0

Only (D) is correct

4 0
2 years ago
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