The bending occurs because light travels more slowly in a denser medium.
Answer:
True
False
False
Explanation:
4.True, When a positively charged object is connect to the 'ground' electrons flow from the 'ground' wire to neutralize the object.
5. False, Electrons can be influenced to move a specific way, but are free to move from atom to atom.
6. False, only electrons move from one object to another.
A single pulley changes the direction of the effort, but it has
no mechanical advantage. The output force is the same as
the input force, so we'd say that the mechanical advantage is 1.
If there are two pulleys, with the rope going up and down and
around between them several times on its way from the effort
to the load, an arrangement that I think is called 'block and tackle',
then the mechanical advantage turns out to be the number of
strands of rope that are supporting the load.
Here go the answer to your question