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kykrilka [37]
4 years ago
9

Which elements are the main components of the Sun?

Physics
2 answers:
dybincka [34]4 years ago
8 0
The answer is hydrogen and helium

hope this helped (:

Ksenya-84 [330]4 years ago
4 0

<u>Answer:</u> The main components of the Sun are Helium and Hydrogen.

<u>Explanation:</u>

Sun is the only star present in Our Solar System around which 8 planets revolve.

Sun is made up of many elements, some of them are: Hydrogen, Helium, Carbon, Nitrogen and Oxygen. The percentages of these elements by mass in Sun are:

Hydrogen: 70%

Helium: 28%

Carbon, Nitrogen and Oxygen: 1.5%

Other elements: 0.5%

In Sun, nuclear fusion reaction takes place where hydrogen undergoes fusion with other hydrogen nuclei to form helium nuclei. Equations for nuclear fusion are given as:

_1^1\textrm{H}+_1^1\textrm{H}\rightarrow _1^2\textrm{H}+_1^0e+\gamma\\\\_1^2\textrm{H}+_1^1\textrm{H}\rightarrow _2^3\textrm{He}-+\gamma\\\\_2^3\textrm{He}+_2^3\textrm{He}\rightarrow _2^4\textrm{He}+2_1^1\textrm{H}\\\\_1^0e+_{-1}^0e\rightarrow \gamma

Hence, the main components of the Sun are Helium and Hydrogen.

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Answer:

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6 0
3 years ago
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Una pelota se desliza hacia arriba por una pendiente se halla inicialmente a 6m de la parte más baja de dicha pendiente y tiene
jolli1 [7]

Answer:

a) vprom = - 0.6 [m/s] b) ver explicacion c) vf = 10.8 [m/s]

Explanation:

Para poder solucionar este problema debemos completar el enunciado del problema así como la pregunta, realizando una búsqueda en Internet encontramos el enunciado completo, así como la pregunta.

"Una pelota que se desliza hacia arriba por una pendiente se halla inicialmente a 6 m de la parte más baja de dicha pendiente y tiene una velocidad de 4 m/s. Cinco segundos después se encuentra a 3 m de la parte más baja. Si suponemos una aceleración constante, "

¿cual fue la velocidad media?

¿Cuál es el significado de una velocidad media negativa?

¿Cuáles son la aceleración media y la velocidad final?

Para facilitar esta solución debemos realizar un esquema del movimiento de la pelota en el plano inclinado. En la imagen adjunta se puede ver un esquema del movimiento de la pelota sobre el plano inclinado en los diferentes tiempos mencionados.

<u>¿cual fue la velocidad media?</u>

<u />

La velocidad media se debe calcular utilizando la expresión de velocidad = espacio / tiempo.

v_{prom}=x/t\\v_{prom}=(3-6)/5\\v_{prom}=-0.6 [m/s]

<u>¿Cuál es el significado de una velocidad media negativa? </u>

La velocidad media negativa significa que se dirige hacia abajo en sentido contrario

<u>¿Cuáles son la aceleración media y la velocidad final?</u>

<u />

x=v_{o}*t+0.5*a*t^{2} \\-3=(4)*(5)+0.5*a*(5)^2\\a=1.36[m/s^2]\\\\Velocity\\v_{f}=v_{o}+a*t = 4+(1.36*5)\\v_{f}=10.8[m/s]

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