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babymother [125]
3 years ago
12

what is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons

Physics
1 answer:
lozanna [386]3 years ago
8 0

28.090.............................................

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3 years ago
An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the
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Answer:

4.7 x 10³ rad / s

Explanation:

During the time light goes and comes back , one slot is replaced by next slot while rotating  before the light source

Time taken by light to travel a distance of 2 x 500 m is

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In this time period, two consecutive slots come before the source of light one after another by rotation. There are 400 slots so time taken to make one rotation

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5 0
2 years ago
The aeroplane lands at a speed of 80 m/s
strojnjashka [21]

The mass of the aeroplane is 300,000 kg.

<h3>What is Newton's second law of motion?</h3>

It states that the force F is directly proportional to the acceleration a of the body and its mass.

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F =ma

where acceleration a = velocity change v / time interval t

Given is the aeroplane lands at a speed of 80 m/s. After landing, the aeroplane takes 28 s to decelerate to a speed of 10 m/s. The mean resultant force on the aeroplane as it decelerates is 750 000 N.

The force expression will be

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Substitute the values and we have

750000 = m x  (80 -10)/ 28

750,000 = m x 2.5

m = 300,000 kg

Thus, the mass of the aeroplane is 300,000 kg.

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The correct choice is D .
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3 years ago
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