Answer:
For the first equation, the work done would be 60 J, but if it is done with 30 N, it would have been 90 J.
Explanation:
it's actually pretty easy one you practice it for some time. W ( work done in joules ) = F ( force put onto the object in newtons ) * D ( distance traveled in meters ).
The answer is #3: Oxidation because oxidation is when a substance reacts with oxygen, which causes the substance to rust. When a rock contains iron and that iron comes in contact with oxygen, iron oxide is created; this weakens the rock.
Float. This is because water has a density of 1 g/ml, so anything less than this will float.
