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Tatiana [17]
3 years ago
11

Phosphorus (P) is an element with an atomic number of 15 and an atomic mass of 31. How many neutrons are in an atom of phosphoru

s? A.15 B.16 C.31 D.46​
Physics
1 answer:
BaLLatris [955]3 years ago
5 0

(31-15 = 16).

Explanation:

the element phosphorus (P) has an atomic number of 15 and a mass number of 31. Therefore, an atom of phosphorus has 15 protons, 15 electrons, and 16 neutrons

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The curved movement of air or water is the result of which of these?
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<h3><u>Answer;</u></h3>

B. the rotation of Earth on its axis

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  • <em><u>Therefore, since air and water move freely, the Coriolis effect makes their movement to be curved. This is why the movement of winds and oceans  does not follow a straight line but it is bent and curved.</u></em>
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4 years ago
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As you walk away from a plane mirror on a wall yiur image is always a real image no matter how far you are from the mirror?
Alexus [3.1K]

Answer:

Correct option is D.

Explanation:

The size may change due to the distance from the mirror

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3 years ago
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Ở nhiệt độ không đổi, dưới áp suất 10^4 Pa l, một lượng khí có thể tích 10l. Tính thể tích lượng khí đó dưới áp suất 5.10^4 Pa
gtnhenbr [62]

Answer:

Thể tích cuối cùng, V2 = 2 L

Explanation:

Cho các dữ liệu sau đây;

Khối lượng ban đầu = 10 L

Áp suất ban đầu = 10⁴ = 10000 Pa

Áp suất cuối cùng = 5 * 10⁴ = 50000 Pa

Để tìm tập mới hoặc tập cuối cùng, chúng ta sẽ sử dụng định luật Boyle;

Để tìm tập mới V2, chúng tôi sẽ sử dụng định luật Boyles.

Boyles phát biểu rằng khi nhiệt độ của khí lý tưởng được giữ không đổi, áp suất của khí tỉ lệ nghịch với thể tích mà khí chiếm giữ.

Về mặt toán học, định luật Boyles được đưa ra bởi;

PV = K

P_{1}V_{1} = P_{2}V_{2}

Thay vào phương trình, ta có;

10000 * 10 = 50000V_{2}

100000 = 50000V_{2}

V_{2} = \frac {100000}{50000}

V_{2} = 2

Thể tích cuối cùng, V2 = 2 L

6 0
3 years ago
You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 25 kg. The rope is at
erik [133]

Answer

Work done will be equal to 1229.296 J

Explanation:

We have given mass of the sister m = 25 kg

Angle between rope and ground \Theta =38^{\circ}

Force F = 30 N  

So horizontal force =Fcos\Theta =30\times cos38^{\circ}=23.64N

Distance traveled d = 52 m

'We have to find the wok done

Work done is equal to multiplication of horizontal force and distance

So work done W=23.64\times 52=1229.296J

7 0
3 years ago
Our solar system is in the _______ arm of the Milky Way galaxy, 28,000 light years from its center.
SOVA2 [1]

Answer: four major arm

Explanation:

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4 years ago
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