In this experiment you observed the polarisation changing properties of beetles. an obvious evolutionary motivation for this is secret signalling, but thits requires the same species to possess polarisation sensitive vision. has this beetle been shown to have such vision, and if so, how was this shown? what are some non-beetle examples of polarisation sensitive animal vision and what are the evolutionary benefits of this aside from secret signalling? there any animals that can detect animal more useful than ability to affect or discriminate linear polarisation? what is haidinger's brush? t affect polarisation?

Learning goal: to understand newton's 1st law. newton's principia states this first law of motion: an object subject to no net force maintains its state of motion, either at rest or at constant speed in a right line. this law may be restated as follows: if the sum of all forces acting on an object is zero, then the acceleration of that object is zero. mathematically this is just a special case of the 2nd law of motion, f⃗ =ma⃗ , when f⃗ =0. when studying newtonian mechanics, it is best to remember the 1st law in two ways: if the net force (i. e., sum of all forces) acting on an object is zero, the object will keep moving with constant velocity (which may be zero). if an object is moving with constant velocity, that is, with zero acceleration, then the net force acting on that object must be zero. complete the following sentences to see if you can apply these ideas. part a if a car is moving to the left with constant velocity, one can conclude that