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Mashcka [7]
3 years ago
8

Which of the atoms shown has an atomic number of 4?

Physics
2 answers:
Tatiana [17]3 years ago
4 0
Atomic number means the number of protons (p). So the answer is B) because the thats the only one with p = 4
ser-zykov [4K]3 years ago
3 0

Answer: B.

Explanation:

Atomic number of an atom is given by number of protons in the nucleus of the atom.

In a neutral atom, number of electrons = number of protons

option A- atom has 7 protons, thus atomic number is 7

option B- atom has 4 protons, thus atomic number is 4

option C- atom has 3 protons, thus atomic number is 3

Thus, B has atomic number 4. The element Beryllium has atomic number 4

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Answer:350.92 KJ/kg

Explanation:

Given the process is reversible adiabatic i.e it is isentropic

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T_1=4500 MPa

P_2=1.4 MPa

From steam table

h_1=3317.03KJ/kg

For isentropic process s_1=s_2

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s_2=6.82 KJ/kg-k

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Therefore Work output of the turbine per unit mass of steam is =h_1-h_2

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=350.92 KJ/kg

8 0
3 years ago
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Answer:

B. Liquids

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goblinko [34]

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