Answer:
A. There are 6.02 x 1023 items in a mole, which equals Avogadro's
number
Explanation:
The mole of a substance is
It's definitely not one of the graphs you gave us to choose from.
Answer:
Gravitation for exert on block along slope = Mgsin30
Since net force is 0 (constant speed)
Frictional force = Mgsin30
C(friction) = Frictional Force/Normal Force
Normal Force = Mgcos30
C(friction) = Frictional Force/Normal Force
=Mgsin30/Mgcos30
= tan 30
=0.577
Explanation: