Q074 - Physics For Engineers And Scientists - Solutions

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Question 74 - Review - Chapter 1

Problem:

Normal blood contains $5.1x10^6$ red blood cells per $mm^3$.

The total volume of blood from a 70 kg man is 5.2 liters

Question:

How many red blood cells does that man have?

Solution:

One Liter = $1 dm^3$

$1 dm^3 = 100 * 100 * 100 mm = 10^6 mm^3$

In [1]:
# Berekeningen
Volume_dm3 = 5.2
Volume_mm3 = 5.2 * 1e6
NumberPer_mm3 = 5.1e6
NumberTotaal = Volume_mm3 * NumberPer_mm3
print('Het totale aantal rode bloedcellen = Volume in mm3 * Aantal per mm3')
print(f'    dus: {Volume_mm3:5.2g} * {NumberPer_mm3:5.2g} = {NumberPer_mm3:5.2g} rode bloedcellen')
Het totale aantal rode bloedcellen = Volume in mm3 * Aantal per mm3
    dus: 5.2e+06 * 5.1e+06 = 5.1e+06 rode bloedcellen

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)


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