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Butoxors [25]
4 years ago
8

Identify the element that has nine protons

Physics
1 answer:
loris [4]4 years ago
5 0
Fluorine has nine protons
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study a 75kg person stands on a scale in an elevator what does read in n and in kg when the elevator is at rest?
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To solve this problem we will use Newton's second law in order to obtain the weight of a person. The second law tells us that

F = ma

Where,

m = mass

a = Acceleration

In this particular case, the acceleration is equal to that exerted by the earth through gravitational acceleration, so if the person's weight is 75Kg and the gravity is 9.8m / s^2 , the weight of the body will be,

F_W =mg

F_W = (75kg)(9.8m/s^2 )

F_W = 735.75N

When the elevator is at rest this reads 735.75N and 75Kg (The same mass of the person)

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Cho các máy cắt sử dụng trong công nghiệp có ký hiệu trên nhãn thiết bị: C350; B500. Hãy tính dòng điện bảo vệ ngắn mạch và dòng
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3 0
3 years ago
A radio signal takes 1.28 s to travel from a transmitter on the Moon to the surface of Earth. The radio waves travel at 3.00108
yulyashka [42]

Answer:

s = 3.84 x 10⁸ m

Explanation:

The distance traveled by an object, while in uniform motion, is given by the following equation:

s = vt

where,

s = distance covered

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In this case:

s = distance between Moon and Earth = ?

v = speed of radio waves = 3 x 10⁸ m/s

t = time taken to travel = 1.28 s

Therefore,

s = (3 x 10⁸ m/s)(1.28 s)

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4 years ago
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hope it helps
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