When iron pipes come in contact with water and oxygen, iron transfers electrons to the oxygen molecules. Which statement about the reactants is correct? (1 point)
O Oxygen is the reducing agent.
o Iron is reduced, and oxygen is oxidized.
o Iron is the oxidizing agent.
O Oxygen is reduced, and iron is oxidized.

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm