jayonelijah
03.07.2019 •
Physics
The size of the picture of a nanparticle is measured to be 5.2 cm by a ruler. if the scale bar size is 3 cm and is labeled 40 nm, find the actual size of the particle.
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Ответ:
The actual size is
69.33 nm.
Explanation:
It means that
3 cm is equivalent to 40 nm
So, 1 cm is equivalent to 40 / 3 nm
Thus, 5.2 cm is equivalent to
40 × 5.2 / 3 = 69.33 nm
Ответ:
nerve cells; circulatory system; 5 hours