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.

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.

Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer