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MissTica
2 years ago
14

The moon rises and sets every day, like the sun. Sarah noticed that the moon was sometimes visible at night and sometimes during

the day. She noted when she FIRST saw the moon (moon-rise) on two days in April. She looked up the time in the newspaper for moon-set. Both were different. Why? A) The moon is orbiting the Earth once per month. B) The night sky is moving east to west over Earth. C) The Earth is moving in an opposite direction from the moon. D) The apparent change in position is related to the Sun's reflection.
Chemistry
1 answer:
eimsori [14]2 years ago
3 0

the answer is A.) the moon is orbiting the earth once per month

its the only logical answer, the others are either impossible or illogical

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Nana76 [90]

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6 0
2 years ago
Cierto elemento presenta dos isótopos cuyos números de masa suman 110 y cuyos números de neutrones suman 58 ¿Cuál es el número a
Anettt [7]

Answer:

El número atómico de cada uno de los átomos es 26

Explanation:

El número de masa es la suma de las masas del protón y el neutrón de un átomo.

El número atómico es el número de protones en el átomo.

Los parámetros dados son;

La suma del número másico de ambos átomos = 110

La suma de los neutrones = 58

Por lo tanto, sea el número de protones y neutrones en un isótopo = P₁ y N₁ y el número de protones y neutrones en el otro isótopo = P₂ y N₂

Tenemos;

 P₁ + N₁ + P₂ + N₂ = 110

N₁ + N₂ = 58

Por lo tanto;

P₁ + P₂ = 110 - (N₁ + N₂)

P₁ + P₂ = 110 - 58 = 52

Dado que los isótopos son del mismo elemento, sus protones serán iguales, por lo tanto;

P₁ = P₂

P₁ + P₂ = P₁ + P₁ = 2 × P₁

P₁ + P₂ = 52

2 × P₁ = 52

P₁ = 52/2 = 26 = P₂

El número atómico de ambos átomos es el número de protones en el átomo que es 26.

El número atómico del elemento del átomo es 26

6 0
2 years ago
Which of the following is not an example of a chemical change?
elena55 [62]
This would be C. A car rusting
5 0
3 years ago
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. A standard dry cell has an output voltage of A. 1.5 VDC. B. 1.1 VDC. C. 1.2 VDC. D. 2.0 VDC.
NikAS [45]
<span>The correct answer is letter A. 1.5 VDC. A standard dry cell has an output voltage of A. 1.5 VDC. Standard dry cell is a type of electricity-producing chemical cell, that is commonly use in households, and even portable devices. Dry cell is zinc-carbon cell and with nominal voltage of 1.5 volts.</span>
4 0
3 years ago
Carl hits a baseball with a force of 8 N. The next batter, Stacy, hits it with 12 N of force. Which ball will accelerate faster?
Marrrta [24]

Answer:

B.

Explanation:

6 0
3 years ago
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