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sertanlavr [38]
2 years ago
10

The total number of protons and neutrons in the nucleus of an atom

Physics
1 answer:
rewona [7]2 years ago
5 0

Answer:

Is the mass number

Explanation:

Every atom is usually identified by using two different numbers:

- Atomic number: generally labelled with Z, corresponds to the number of protons in the nucleus, so Z = p

- Mass number: generally labelled with A, corresponds to the number of protons+neutrons in the nucleus, so A = p + n

To find the number of neutrons in a nucleus, therefore, we can do

n = A - Z

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Un tubo cilindrico hueco de cobre mide 3 m de longitud tienen un diametro exterior de 4cm y un diametro interior de 2 cm¿cuanto
Irina-Kira [14]

Answer:

 W = 9.93 10² N

Explanation:

To solve this exercise we must use the concept of density

           ρ = m / V

the tabulated density of copper is rho = 8966 kg / m³

let's find the volume of the cylindrical tube

           V = A L

           V = π (R_ext  ² - R_int ²) L

let's calculate

          V = π (4² - 2²) 10⁻⁴  3

          V = 1.13 10⁻²  m³

         m = ρ V

        m = 8966 1.13 10⁻²

        m = 1.01 10² kg

the weight of the tube

        W = mg

         W = 1.01 10² 9.8

         W = 9.93 10² N

4 0
2 years ago
What are some of the difficulties with measuring the volume of a gas? Select all that apply.
forsale [732]

Answer:

it is ---D because you can't measure gas and it's mass

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6 0
2 years ago
A first aid provider is trained to do the following except:
Elodia [21]
A.
They’re supposed to help the person and cannot diagnose them as that is the job of a doctor
7 0
3 years ago
Help me with this please
creativ13 [48]

Answer:

i dont understand, can you put it in word form please.

Explanation:

4 0
2 years ago
A student is creating a table with properties of electromagnetic and mechanical waves.
katen-ka-za [31]

Answer:

The property of the wave marked X is related to the source of the wave

Explanation:

The source of of origin of waves

Electromagnetic wave are waves that consists of varying electric and magnetic field that vibrate perpendicular to each other and to the direction of propagation of the wave and they are therefore transverse waves and transfer energy

Electromagnetic waves originate from the vibration of charged particles that gives off varying electric and magnetic fields

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Mechanical waves originate from vibration of the particles of a medium

Sound waves which is a form of longitudinal mechanical waves that propagates by the vibration of the particles of a given medium about a point parallel to the direction of propagation of the wave.

8 0
3 years ago
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