Wood has a lower density than water, and thus the upward buoyant force provided by the water is equal to the weight of the wood submerged.
Penny has a smaller density
I would say wood would be ur best option.
The sound waves travel because of the pitch of the note so the window rattles.
I can see that they are running away like my dad did
Answer:
anywhere between 100000 to about 400000 human years .
Explanation:
Answer:

Explanation:
v = Speed of electron =
(generally the order of magnitude is 6)
m = Mass of electron = 
Work done would be done by

The work required to stop the electron is 