Recent content by Artus

We had to do a lab for the IB programe...and we (my group) decided to test the effect Iron II would have on two different types of bleach (Hydrogen Peroxide and Sodium Hypochlorite). We stained 4 filter papers with coffee...then we tried to bleach the first filter paper with Sodium...

We dissolved Ferrous Ammonium Sulfate in water to get Iron II.. Then we added Iron II to Sodium Hypochlorite NaOCl (bleach)... We stained a filter paper with coffee and tried to bleach the coffee using it (Sodium Hypochlorite with Iron II), but it didn't bleach well... Now I need to write a lab...

If you are an observer moving in the same direction as a moving object, what can you say about the relative velocity of the object? Would it make a difference if you were leading or following?