Q071 - Physics For Engineers And Scientists - Solutions

ON7AMI

Amateur Radio and Astronomy website. JO10UX

Question 71 - Review - Chapter 1

Problem:

The atomic mass of fissionable uranium is 235.0 g.

Question:

a) How much does one atom weigh in kg?
b) In Atomic mass unit?

Solution:

1 Atomic mass unit u = 1.66053904e-27 kg

weight of one atom = atomic mass * u

In [1]:
import numpy as np
import scipy.constants as physics
amu = physics.value('atomic mass constant')
am_u = 235.0; # gr
weight_u = am_u * amu;
print(f'\ta) Gewicht van één atoom U is {weight_u:.2e} kg');
	a) Gewicht van één atoom U is 3.90e-25 kg
    b) The weight of the atom in atomic mass units is, according to the definition, equal to the atomic mass 235

سُوۡرَةُ حٰمٓ السجدة / فُصّلَت
ثُمَّ اسْتَوَىٰ إِلَى السَّمَاءِ وَهِيَ دُخَانٌ فَقَالَ لَهَا وَلِلْأَرْضِ ائْتِيَا طَوْعًا أَوْ كَرْهًا قَالَتَا أَتَيْنَا طَائِعِينَ ﴿١١
فَقَضَاهُنَّ سَبْعَ سَمَاوَاتٍ فِي يَوْمَيْنِ وَأَوْحَىٰ فِي كُلِّ سَمَاءٍ أَمْرَهَا ۚ وَزَيَّنَّا السَّمَاءَ الدُّنْيَا بِمَصَابِيحَ وَحِفْظًا ۚ ذَٰلِكَ تَقْدِيرُ الْعَزِيزِ الْعَلِيمِ ﴿١٢


Surah Fussilat: Thereafter turned He to the heaven and it was as smoke, and said Unto it and Unto the earth: come ye twain, willingly or loth. They said: we come willingly. (11) Then He decreed them as seven heavens in two days, and revealed Unto each heaven the command thereof; and We bedecked the nether heaven with lamps and placed therein a guard. That is the ordinance of the Mighty, the Knower. (12)

De hemelen en aarde (waren) een samenhangende massa. Wij hebben ze toen van elkaar gescheiden… Wij hebben de hemel tot een beschermend dak gemaakt … en de dag en de nacht, de zon en de maan geschapen. (Koran 41 11:12)


Copyright (c) 2000-2014 - Jean Paul Mertens - ON7AMI - formal ON1AMI - Grote Steenweg 86 - 9840 Zevergem - Belgium - Europe