Answer:
This is a chemical property. If iron does rust, this is a slow chemical change since rust is an iron oxide with different properties than iron metal.
<span>1) The resistance force relate to the effort force for the fixed pulley alone be being equal to the effort force. resistance force = effort force. 2) The mechanical advantage compare with the slope of the line for each pulley by being independent of slope. </span>
Answer:
Explanation:
1- incident ray
2- the substance through which the wave travels