PHIL 3060 Lecture 15: Aquinas part 2 phil3060

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erintermite316

19 Apr 2016

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2nd way: from the nature of the efficient cause. From the fact that there are causes in the world. Nothing can be the cause of itself because then it would need to be prior to itself. To take away the cause is to take away the effect. Nothing can be the efficient cause of itself. There must be some first cause which is itself uncaused. *this is an explanation for why things exist at all. Efficient cause is meant to be understood in the sense of all existence. Nothing would exist at all in the here and how unless there was an efficient cause. 5th way: taken from the governance of the world (proof from final causality) Things which lack intelligence such as natural bodies, act for an end cannot move towards an end unless it is moved by an intelligent being. Natural beings without knowledge act for an end (i. e. they regularly strive to perfect themselves)

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For my Physic class, my teacher assigned us with a project of creating a mechnical cannon, meaning no human, electrical, chemical, pneumatic energy can be applied. I was wondering if you guys have any idea of the type of mechnical mechanism that I should use to fire tennis at both a 8 m and 12 m target. Two ideas that I have right now are either to use some spring loaded mechanism or rubber bands. The rules for the testing are that we will only have two minutes to fire as many shots as possible in the hope that it will land in a trash can at the prementioned distance. We get 3 pt if the ball gets in the can, 2pt if it hits the can but does not drop into it, 1 pt if it hits within a 1/2 meter of the can. As a result, a mortar would be prefered since it is over a relatively short distance where a arc would be greatly favorable. At the same time, the mechanism must not only be accurate but fast. In the two minutes, we must fire as many shots as possible for a max of 15 at each location. So five direct hit would be enough. Since time is of the essence, I was thinking that a spring loaded mechanism would be prefered over rubber bands. Please provide any suggestion on other possible mechanism that would produce better results. Also any help on the overall design of the cannon itself will be greatly appreciated. My idea is to have a tube with a spring attached at the bottom. The firer would first pull down the spring and then the loader would drop the tennis ball, upon which the firer would release the spring. I would also appreciate it if you could explain how to add a aiming mechanism on the mortar. I plan to have it on a base plate with a bipod.

We were told to hit the bull's eye of a target that is on a steepincline uphill or downhill from us we must calculate the horizontaldistance the target is from us and ignore the vertical distance thebullet travels. The reason given was that gravity acts upon thebullet only to the extent of it's horizontal travel.

The exact example given was: a target 1300 yards away as measureduphill, is only 775 yards away horizontally and therefore we holdas though the target is 775 yards away. It does not matter whetherwe are shooting uphill or downhill, the hold would be thesame.

Is this example accurate. Can you explain to me why this isso?

drop ame level as the shooter and 300 yards away if the trajectoryof a bullet fired up hill or downhill will be that of a bullet

Consider three identical spherical conductors. One conductor,labeled A, is given a
charge of 7mC of type Nell. The charge state of the second andthird conductors, B and C, are unknown. The conductors undergo asequence of 3 contacts that occur ONLY between pairs of conductors.After the contacts, the net charge on each conductor is A: (0.25mCof type Nell), B: (1.875mC of type Nell) and C: (1.875mC of typeNell). Letâs make the assumption that the type Paul charge statecorresponds to an excess of electrons.

Because these three spheres are ______________________ the_______________ can be
freely exchanged between any pair of conductors in contact. Sincethese conductive
spheres all have the same size, when the spheres are placed incontact the ______
_____________ will evenly distribute between the two spheres.Because charge is a
property of particles and the particles can not be destroyed ANDthere is no outside
source of charge, the _______________ charge of the ______________must remain
constant at 4mC of type Nell. Based on this information, we candetermine that the
charge of at least one of B or C must be of type_______________.

To determine the order of contacts we must start from the lastcontact and work our way to the first contact. It is important tonote that because we have no initial charge state information forspheres B and C that we have the ability to make an arbitrarydecision about the initial charge state of these two spheres. Inother words, the charge states of sphere B and C areinterchangeable. Third and last Contact: Because spheres ________and _______ have the same charge we can determine that they were______ in contact. If we look at spheres B and C as the system, wefind that the total charge of the sub system consisting of B and Cwas ______________ of type _________.

Second contact: We can safely assume that A touched either B or Cprior to B and C
being brought into contact. Here we can make the arbitrary choicethat B touched A in the second contact. If this is the case, weknow that the charge of B ___________ it touched C must have been______________ of type __________ because it must have the sameamount and type of charge as the final state of _______. Therefore,at this instant we know that the charge on sphere C was________________ of type ____________________ it touched B.

First contact: Now we have an interesting situation. We find thatthe charge state of
sphere C would be consistent with sphere C being initially____________ and being
placed in contact with _______________ since the charge state of Cis exactly
__________ that of ____________ initially. This would mean that thecharge state of
sphere A after contact with ______ would be _____________ of type__________.
However, we already determined that the __________ charge of thesystem containing sphere _______ and sphere _______ in the secondcontact was ____________ of type __________. The only way this ispossible is if sphere B has a charge of __________ of type____________.

Final Results
The initial charge state of sphere Ais:_________________________________________
The initial charge state of sphere Bis:_________________________________________
The initial charge state of sphere Cis:_________________________________________
In the first contact of sphere ___________ to sphere_________________ how many
electrons were transferred from one sphere to the other?
In the second contact of sphere ___________ to sphere_________________ how many
electrons were transferred from one sphere to the other?
In the third contact of sphere ___________ to sphere_________________ how many
electrons were transferred from one sphere to the other?

PHIL 3060 Lecture 15: Aquinas part 2 phil3060

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