A cubical block of wood, 10.0 cm on a side, floats at the interface between oil and water with its lower surface 2.30 cm below the interface (Figure 1). The density of the oil is 790 kg/m3.

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. 

I’m not sure about this question

Hi there, the property that gives muscles the ability to contract and relax is the presence of actin and myosin.

Answercarbon< supernova