amberwithnell12512
19.11.2020 •
Physics
C’est un
On dispose d'un échantillon de
8
,
7
4
×
1
0
−
1
m
o
l
8,74×10
−1
mol de molécules d'eau (
H
2
O
H
2
O).
On donne :
N
A
=
6
,
0
2
×
1
0
2
3
m
o
l
−
1
N
A
=6,02×10
23
mol
−1
Déterminer le nombre de molécules d'eau de cet échantillon.
On donnera un résultat avec 3 chiffres significatifs.
Solved
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Ответ:
Ответ:
Make the angle of reflection and the angle of incidence equal.
Explanation:
The law of reflection states that at the point of incidence on a smooth surface, the angle of incidence is equal to the angle of reflection, The incident ray, the normal and the reflected ray lie on the same plane.