An iron piece and wooden piece has equal weights in air .if they are removed from air to vacuum what happens to their weights?

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

Answerapplying a direct current to a non magnetic material in order to create a electromagnetic field; plz check first good luck;

The scientific method is1)make an observation. scientists are naturally curious about the world. 2)form a question. after making an interesting observation, a scientific mind itches to find out more about it. .3).form a hypothesis. 4)conduct an experiment. 5)analyse the data and draw a conclusion.