<span>Origin
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The average newborn sleep 16-18 hours in a 24 hour period.
Infrared rays are felt <span>as heat is transferred between Earth and the atmosphere</span>
According to the question, the width of a pin is 0.001m and the width of a red blood cell is 6-8 μm.
Width of pin in μm = 1000μm.
So approximately 1000/8 red blood cells can fit which is equal to 125 RBCs.
Answer: 125 RBCs
