If your children are doing a science fair project to determine if an object that can float or sink in one type of liquid would it be able to do the opposite in another type of would be the best types of objects and liquids to use? is there anything out there that floats in one liquid and sinks in another? how would you even go about starting this project? what should we know? ( i need this project is harder than my own physics )

Sorry can’t u just tryna get points

Then the answer would be d then

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.