A hockey puck at rest on a very smooth icy surface with negligible friction. It is struck with a hockey puck to the right. It speeds up while it is in contact with the stick. As soon as it loses contact with the hockey stick, it keeps moving with little friction. Shortly after that it hits a rougher icy surface which causes it to slow down and then stop Apply the Work-Energy Principle to the puck for all three phases. Show the FBD for each phase and include
the displacement vector. Explain which force does positive work and which force does negative work and
which force(s) does O work and how that impacts the kinetic energy overall. You can use a table to organize
your work. It is up to you how to proceed as long as you are clear. Again there are no calculations.
For each phase of the motion explain how the different types of energy are changing...are they changing from
potential to kinetic, kinetic to thermal, not changing at all, etc. State whether energy is conserved at each stage
and why or why not. Where does the energy from the original hit go?

Scientific classification

Mass / weighthope it !

Answerhave high resistance to flow

All these statements are related to drake's equation. it is a probabilistic equation that shows an aproximate number of civilizations in our galaxy that we can communicate with. all the numbers that are inserted into equation are not precisely known so the result varies from 1000 to 100,000,000. the equations was not created to calculate exact number of extraterrestrial civilizations but to increase scientific knowledge how to find them.the equation is: where: n=  represents the number of civilizations in our galaxy that we could in principle communicate with today.  the average rate of  star formation  in  our galaxy  the fraction of those stars that have  planets  represents the number of planets in the galaxy that are in principle capable of having surface liquid water and life.  essentially represents the probability that life eventually arises on a habitable planet.  represents the number of life-bearing planets in the galaxy.  epresents the total number of planets on which intelligent beings have evolved and developed a communicating civilization at some time in the galaxy's history.    essentially represents the probability that on a planet with life, some organisms will eventually evolve to the point where they can build radio telescopes.    is a factor that depends on how long civilizations that reach our level of technology are able to survive.