1. Copper. Symbol: Cu
2. Molybdenum. Symbol: Mo
I think it might be D because all waves travel through a medium. I might be wrong though.
Do u know newtons law of gravitation
F=Gm1*m2/r^2
F=attraction force =?
Answer:
d = v² / (2μ g)
Explanation:
In the work relationship is equal to the variation of energy,
W = ΔEm
The work is defined by
W = F. d = F d cos θ
In this case the outside is the force of friction, which always opposes
to the movement, so the angle is 180 °
W = - fr d
The force of friction can be found with Newton's second law
fr = μ N
Y Axis
N- W = 0
N = mg
fr = μ m g
We substitute in the expression of work
W = - μ mg d
Now we use the relationship of work and energy
-μ mg d = 0 -½ m v²
d = v² / (2μ g)