How much greater is the resistivity of lead to copper? 12 times 1.2 times 0.80 times 0.080 times

Abird sitting high in a tree is an example of what type of wnergy

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '