PHL271H1 Lecture Notes - Lecture 1: Jaywalking, Counterargument

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ty74

6 Aug 2022

School

UTSG

Department

Philosophy

Course

PHL271H1

Professor

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Document Summary

Hart"s criticisms of the command theory of law. First 3 criticisms problems w/ understanding law in terms of orders. Laws don"t really look like orders at all. Criticism 1 there appear to be parts of law that are quite a bit different from the criminal law, and cannot be understood as orders backed by threats. Wills the state doesn"t force me into a will, no sanctions for not doing. Is giving an opportunity to do so if you want to. Rules that specify a judge"s jurisdiction or the qualifications for being a judge (or so any other office) Not facing a penalty, you just weren"t able to exercise a power. Being 34 and trying to be prime minister. Laws but not orders backed by threats. Austin"s counterargument nullity as a sanction (p. 33) Hart"s first reply nullities are not an evil to a person. Nothing really bad happens to you not like your situation has changed as a result.

Related Questions

A mass m rests on a frictionless horizontal table and isconnected to rigid supports via 2 identical springs each of relaxedlength L0 and spring constantk. Each spring is stretched to a length L considerable greater thanL0. Horizontal displacementsof m from its equilibrium position are labeled x and y.

(Diagram insert didn't work, all it really tells you is that xis on the axis of the springs and y is perpendicular to thesprings)

a) Write down the differential equation of motion (i.e.,Newton's Law) governing small oscillations in the xdirection.

b) Same as a but in the y direction (assume that y <<L).

c) In terms of L and L0, calculate the ratio of the periods ofthe oscillations along x and y.

d) If at t=0 the mass m is released from the point x = y = A0with zero velocity, what are its x and y coordinates at any latertime t?

---------------------------

So, I started with just ma = -2kx for a, leading me to thedifferential equation x''(t) + (2k/m) x = 0.

Then I did basically the same thing with y.

However, when I get to c, there's my problem - I don't knowhow I could write any of this in L and L0.

Also, b doesn't really make sense to me because if y is smallwhen compared to L, it seems like there shouldn't be anyoscillation in the y direction.

The answer the back of the book shows for c and d are:

c) Tx/Ty = (1 - L0 / L)1/2

d) x(t) = A0cos( (2k/m)1/2 t)

y(t) = A0cos( (2k(L-L0)/mL)1/2 t)

I have no idea how they got to these answers. Can somebodyhelp me? It has something to do with springs already beingstretched, but it seems they are making an assumption somewherethat I don't understand.

Brief and detail

If relativism is true, can you ever judge something as being morally wrong? Consider some really horrible actions, genocide, murder, slavery, torture or add your own. If you feel a relativist could say that these things are actually wrong, what gives them this ability? If they can't, why not?

Agree or disagree

Similarly to what I said in the first discussion on what morality means to us, I think everyone has their own set of moral principles and obligations. So I do think that relativism is true, to a point however. I used Adolf Hitler and the Nazi empire as an example in the first discussion so I will use that here. Hitler knew in his brain that what he was doing was good for his nation and arguably the world. Now, as a modern day society we can agree that was wrong. For him, it was good. In his own mind, he is right. But it is relative to the person. Generally speaking we all have similar notions of what is right and what is wrong. Most people would say that going out of your way to help someone else is a morally good principle. Selflessness in society is seen a good thing by the vast majority of people. When I say that relativism is good to a point, I mean that there is a general basis in society that deems actions as good or bad. And since most of us would all agree that hitlers actions were bad, then we say that he had bad moral principles, even though to him, they were good. It’s a little confusing even for me to put into words. Basically, if you actions are generally viewed in society as good, then you have good moral principles even if they vary from person to person. No one will have the exact same moral standards, but generally they all are very similar in society. So relativism is true until the point where the majority of society would deem your actions and wrong. I hope this makes sense.

Agree or disagree

If relativism is true, I don't think judging something as morally wrong is possible. Because the definition of ethical relativism is the moral standard only being correctly relative to each person/society, this means that the moral standard is created by you and/or the society you identify with and therefore eliminate the existence of an absolute moral principle. Since the moral standard is different for every individual, we cannot say that someone is morally wrong. If relativism is applied, that is. If a relativist were to say that they could judge someone as morally wrong, then that would contradict the main component of being a relativist. That every moral argument of yours is correct, therefore everyone else's is also correct. Quite problematic but that is my understanding on the matter

ell25

Vapor cycles
5EM - Thermodynamics
September 2010
1 The T-S diagram
The temperature-entropy diagram is an alternative to the well knownpressure-
volume diagram. Before using it to analyze different vapor cycles,we need
to understand it properly.
1. Plot the following transformations for ideal gases in a T-Sdiagram
(a) Isothermal expansion
(b) Isobaric expansion
(c) Isometric heating
(d) Reversible adiabatic expansion
(e) Irreversible adiabatic expansion
2. Repeat the last question, but this time do it for a realsubstance,
starting in the compressed liquid1 region and ending in thesuperheated
region, when possible. Indicate the boundaries of eachregion.
3. We know that under certain circumstances the area under theplot
in a P-V diagram represents the work performed during theprocess.
What does it represent in this case? Under what assumptions isyour
answer true? Compare examples 6.1 and 6.2.
2 Thermal machines
We understand by thermal machine a device capable of transformingther-
mal energy (heat) into mechanical energy (work). We already knowthat
these machines have a limited efficiency which, in the two-sourcesmodel, is
obtained by Carnotâs cycle.
(Compressed liquid is sometimes also called subcooled liquid)
2.1 Carnot cycle
This cycle, although efficient, is impractical. To begin with, theextreme
temperatures of the cycle should be within the sources temperaturesfor a
finite heat flow to exist.
1. Given the temperature of the sources, draw the cycle accordingto the
named limitation.
2. Show that this leads to lower efficiency than the theoreticallimit.
3. Assume that heat flow from/to the sources is proportional to thetem-
perature difference between them and the working fluid, anddemon-
strate that a higher power output is related to a decreasedefficiency.
2.2 Rankine cycle
Out of the several practical possibilities, Rankine cycle and itsvariations is
widely used, especially for electric power generation.
1. Draw the basic cycle in a T-S diagram and explain it.
2. What does the efficiency of the cycle depend on? Comparewith
Carnotâs.
3. What are the differences between the ideal cycle and the realone?
4. Describe how it is modified by superheating and/or reheating.Explain
te benefits.
2.3 Problems
After answering the previous questions solve the followingexercises from the
book: 8.2, 8.4, 8.5, 8.13, 8.19, 8.20
3 Frigorific machines
3.1 Reverse Carnot cycle
We have already studied Carnot cycle in detail as the ideal thermalmachine.
Now we will take is as the starting point to understand thecharacteristics
of frigorific machines.
1. Draw the ideal cycle in a T-S diagram and explain it.
2. Show that this cycle has a theoretical efficiency Ã =Tcold/Thot-Tcold
3. What are the difficulties in implementing such cycle in actualdevices?
3.2 Actual refrigerators
1. Why is the turbine replaced by an expansion valve in mostcases?
2. Plot the actual cycle and explain the differences with the idealcase.
3. How do cascade and multistage systems improve the performanceof
the refrigerator?
4. What aspects are important in the choice of a refrigerant fluid?Justify
3.3 Problems
After answering the previous questions solve the followingexercises from the
book: 10.2 10.7, 10.8, 10.9, 10.22, 10.23 10.1D

PHL271H1 Lecture Notes - Lecture 1: Jaywalking, Counterargument

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