Ni is Nickel.
He is Helium.
Pb is Lead.
Answer:
I think the answer is a no. I guess
Explanation:
don't mind if it is write or wrong
Answer: True I'm not very good at Chemistry, I'm sorry if it's wrong, I'm sure it is true though. I hope it helped!!
Answer:
the object is still
Explanation:
You need a stronger force than the opposing force to move an object.
Answer
the medium does not change the speed of the on they should change.
Explanation:
The speed of the waves is constant for a given medium, depending on the physical properties of the medium,
When a wave is strapped on a wall of a medium it does not change the properties of the medium, the wave changes direction, but since the medium does not change the speed of the on they should change.
