Acube of side 5cm is placed in a fluid. for the following velocity values, calculate the average divergence of the flow. is there a source or sink within this box? the velocities are given in cm/s. the cube is oriented so that the +z axis exits the front face, the +x axis exits the right face and the +y axis exits the top face. front. vr=30i+60j-30k right v 20i-20j+20 left v-100i+200j+300k ^ ^ top-5+ 50+ 10k bottom vbe0 back vb. =250k also draw a diagram showing these velocities.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?