Law is a system of rules created and enforced through social or governmental institutions to regulate behavior, with its precise definition a matter of longstanding debate. It has been variously described as a science and the art of justice. State-enforced laws can be made by a group legislature or by a single legislator, resulting in statutes; by the executive through decrees and regulations; or established by judges through precedent, usually in common law jurisdictions. Private individuals may create legally binding contracts, including arbitration agreements that adopt alternative ways of resolving disputes to standard court litigation. The creation of laws themselves may be influenced by a constitution, written or tacit, and the rights encoded therein. The law shapes politics, economics, history and society in various ways and serves as a mediator of relations between people.
Legal systems vary between countries, with their differences analysed in comparative law. In civil law jurisdictions, a legislature or other central body codifies and consolidates the law. In common law systems, judges make binding case law through precedent, although on occasion this may be overturned by a higher court or the legislature. Historically, religious law influenced secular matters, and is still used in some religious communities. Sharia law based on Islamic principles is used as the primary legal system in several countries, including Iran and Saudi Arabia.Law's scope can be divided into two domains. Public law concerns government and society, including constitutional law, administrative law, and criminal law. Private law deals with legal disputes between individuals and/or organisations in areas such as contracts, property, torts/delicts and commercial law. This distinction is stronger in civil law countries, particularly those with a separate system of administrative courts; by contrast, the public-private law divide is less pronounced in common law jurisdictions.Law provides a source of scholarly inquiry into legal history, philosophy, economic analysis and sociology. Law also raises important and complex issues concerning equality, fairness, and justice.
I've been trying to study for my final and I can't seem to figure out how is this suppose to work.
1. Homework Statement
A wall (m infinite, v=0) hits a car (m=2600 kg; v=142 km/h). The car becomes deformed and the crush zone (0.7 m) is compressed. Calculate the corresponding acceleration...
Homework Statement
A cylinder fitted with a frictionless piston contains 5.0×10-4m3 of an ideal gas at a pressure of 1.0×105 Pa and temperature of 300K.
The gas is then
(i) heated at constant pressure to 450K, and then
(ii) cooled at constant volume to the original temperature of 300K. The...
Ecosystems are open systems, they receive solar energy and other materials from outside the ecosystem and migration of animals is also witnessed.
I read Physics uptil class XII and have done a bit of research on google books and have come across these three books:
1.Towards a Thermodynamic...
Dear all,
I've never really understood how exactly Liouville's theorem about time-conservation of phase space volume can be reconciled with the second law of thermodynamics. Recently I came across this popular article,
http://www.necsi.edu/projects/baranger/cce.pdf
"Chaos, Complexity, and...
I have a doubt on this calculation of magnetic field in presence of displacement current. Consider a capacitor of radius ##R## and with plates at distance ##d## being charged: there is a displacement current in it.
Suppose that I want to calculate the magnetic field ##B## at a distance ##r <...
Hello,
I’ve been trying to derive Posseuille’s Law and I’m very close. However there seems to be a small difference between my concluded formula and the real one but I don’t know why.
Here’s what I get:
Picture a cilindrical tube with a radius ##R## in which a fluid is flowing. From what I...
When considering the magnitude of the magnetic field at a certain point (##P##) away from an infinite/finite wire, I can't understand how an infinite wire would generate a stronger magnetic field (##B##) in contrast to a finite wire that has the same dimensions and current applied, at the same...
The integral form of Maxwell's equation pertaining to induced electric fields is:
∮E(t0)⋅dℓ= −dΦ(t)/dt|t=t0Say for a long time, in some circular region there has been no B or E fields present. Then, there is a sudden constant increase of B field introduced in the middle. I know that information...
I would really appreciate some clarification about how to draw graphs showing changing flux and induced EMF. I understand that there needs to be a 90 degree phase difference as the EMF is a maximum when the flux has the greatest rate of change. However, our exam board says that the EMF can be...
Homework Statement
Explain what happens in the following situation:
You have a loop in the form of a circle and there is a varying magnetic field inside that loop as the following picture illustrates:
Homework Equations
Faraday's law
lorentez force
The Attempt at a Solution
I first thought...
A varying magnetic flux causes an induced voltage (according to Faraday-Lenz law) that generates a current that generates a magnetic field that generates another magnetic flux in the same circuit. Does the Faraday-Lenz law include this self induction? In other words why can't we take that...
Hello,
I'm going through Kirchoff's second law, and stumbled across this example on this page:
In the image above, you can see that the blue arrows (both arrow 1 and arrow 2) indicate the direction that the current goes in. However, I am wondering why the current cannot go as per the red...
3. The Attempt at a Solution
My thinking is that if cross sectional area of the cords increase wouldn't the cords be heavier and thus it would require more work to pull/stretch the device? So more work is done?
(But the answers say less work is done because there is a smaller extension/won't...
Raoult's law: P = xP* , combined with Dalton's law becomes y = xP*/P
Henry's law: P = kx, combined with Dalton's law becomes y = kx/P
Relative volatility: y = ax/(1 + (a -1)x)
Raoult's law and Henry's law are linear when temperature and pressure are kept constant. But if we vary the temperature...
How can we prove the law of conservation of mass ? I said prove not the verification, how lavoiser decided that yes this law is followed by every chemical reaction, is there a proof
The Attempt at a Solution
[/B]
I know that spring A shows elastic deformation since it returned to its original shape once the stress removed and spring c shows plastic deformation and has been permanently extended so it won't return to its original shape.
BUT, I'm struggling to complete the...
According to Ohm's law, "Physical conditions remaining the same, the electric current flowing through a conductor is directly proportional to the potential difference across the two ends of the conductor"
I have two conceptual queries:
FIRST
When the ends of the conductor are not connected to...
I keep reading articles that assert that spiral galaxies would fly apart if it were not for the presence of a dark matter halo. The observation that rotational speeds vary little with distance from the center is usually cited as the 'proof' of dark matter since this behavior would otherwise...
Is it possible to calculate the rate of change of n with respect to rate of change of Pressure and rate of change of Temperature with V unknown but constant by PV = nRT?
Rate of change of Pressure and rate of change of temperature can be measured. R and V are constants.
Homework Statement
A mass ##m## on a frictionless table is connected to a spring with spring constant ##k## so that the force on it is ##F_x = -kx## where ##x## is the distance of the mass from its equilibrium position. It is then pulled so that the spring is stretched by a distance ##x## from...
Homework Statement
Find the total time, t, that an object takes to reach the surface of the Earth from a distance, D, using the Law of Gravitation: $$F_{g} = \frac{GMm}{x^2}$$
R is radius of Earth
D is distance from surface
R+D is total distance from center of masses
****** One Dimension...
Homework Statement
Hello,
I am not asking for the answer to an example, rather how the book got some numbers. The problem is an example from the book and shows me the solution but does not show the steps.
Given: The compressed air tank has a volume of .84 ft^3. The temperature is 70 F and the...
I'm working on induction at the moment, and the math makes sense, but Lenz's Law is giving me trouble. Does anyone have an easier way (relatively) of remembering the directions of emf? Any advice is appreciated.
Homework Statement
[/B]
I need to help solving part a)
Homework Equations
[/B]
$$v= \frac{2\pi}{T}$$
$$(\frac{T_1}{T_2})^2 = (\frac{r_1}{r_2})^3$$
The Attempt at a Solution
I'm not sure where to begin really. One approach I tried was getting T_1 in terms of v_0 and plugging it into...
Homework Statement
There's a disc with a current density surface σ, with radius R and angular velocity ω
Find the B
Homework Equations
α = vσ=ωrσ
The Attempt at a Solution
I'm having problems understanding why the cross product gives αr
Firstly I appologize, that I am not native english speaker and I don't study physics(but cybernetics we are getting just some general knowledge about physics), but hopeffuly I will write this right.
Homework Statement
We know that inside of a conductive object is protected from influence of...
Faraday's law talks about the change in the flux through a loop, but I never see how people take into account the change in the flux due to Faraday's law itself and I am wondering if that leads to a contradiction.
For example when calculating the current through a physical loop with area A and...
I have a question on convention regarding the universal law of gravitation formula. Sometimes the distance is represented with the lowercase r and sometimes with the uppercase R. Why is it listed two different ways? I am thinking that r is the total distance and R is the radial distance, no...
Homework Statement
(introduction course of university physics)
A 25- L container holds ideal hydrogen (H2) gas at a gauge pressure of 0.25 atm and a
temperature of 0°C. What mass of hydrogen gas is in this container? The ATOMIC mass of
hydrogen is 1.0 g/mol, the ideal gas constant is R =...
Say we have a tire filled with air (equal to ambient air surrounding it in every way). pressure on the gauge is 0. Then, we pressurize it to 1 ATM (15psi). If we heat the tire , the air will be heated and expand based on gas law, or is there a factor that changes it based on the air's...
I couldn't remember which number was which in Newton's laws of motion, and so I clicked the first link I found, but to my amazement it seems that while Rice University got the number right, they got the facts of how it works wrong. Ironically it seems they have made the same mistake as that...
Homework Statement
Using Kirchov’s Current Law (KCL) at the top node of the circuit, write the differential equation for the membrane voltage (Vm). Solve for Vm(t) symbolically,assuming that all other voltages, all resistances, and the capacitance are constant
Homework Equations
Current law...
Hello everyone!
I'm currently trying to calculate electric forces between two objects, so for that I of course need Coulomb's Law.
I understood its equation (etc.), but there are 3 things that I haven't found out yet:
-How exactly can you find out or calculate what amount of charge an object...
Hello Forum,
The speed of water exiting from a side narrow hole at depth h in a large bucket is given by ##v=\sqrt{2gh}##.
This result is obtained applying Bernoulli's equation along a streamline that goes from the top free surface to the drain on the side of the bucket at depth h.
The water...
Is the law of cosines the only equation that expresses the relations between the sides and angles of a triangle? (Other than the law of sines). For example: Suppose we have a triangle and sides a,b and the angle opposite of c is known. Then invoking the law of cosines, we know that c sq = a...
Homework Statement
I am looking at the following system:
It shows a pore/tube (B) which is attached to a reservoir A. The fluid in reservoir A has a non-zero velocity in the horizontal direction, but I assume that the tube B is so long that the velocity there is unaffected and still zero...
Is the law of conservation of momentum valid in non isolated system . What is an isolated system? My teacher confuses me that the law is valid in an non isolated system . They even say that when we say about the isolated system (meaning they are present ) we do not consider the air resistance...
I was just wondering, what if an object is placed in our solar system, will it revolve around the sun? If yes, will it have a centripetal acceleration too?
Consider two objects, "A" and "B", each having mass 1kg. Object "A" moves downward towards object "B" and collides with the extended arm of object "B". Let's say for the sake of argument that during this collision object "A" lost one unit of momentum and 0.5 joules to object "B" (This value does...
Homework Statement
The position of a 49 g oscillating mass is given by x(t)=(1.8cm)cos12t, where t is in seconds.
Homework Equations
k=mg/x
The Attempt at a Solution
I've tried working this problem multiple different ways and it is just not working for me.
I used k= (.049*9.8)/.018
Is this...
Homework Statement
Snell's law is:
$$\frac{\sin\theta_1}{c_1}=\frac{\sin\theta_2}{c_2}$$
$$\frac{c_1}{c_2}=n_{12}$$
Express ##\theta_2## as a function of ##\theta_1##
Find the largest value of ##\theta_1## for which the expression for ##\theta_2## that you just found is...
Homework Statement
Three charges, q1, q2, and q3, lie in a plane, as shown below. Find the net force on charge q2 (please refer to attachment for diagram)
Homework Equations
F= k x q1q2/R^2, knowledge of trig functions and separating x and y components
The Attempt at a Solution
So I found the...
A cone-shaped water tank is given by V(h)=\pi(h-\frac{h^2}{3}+\frac{h^3}{27})
Show using Torricelli's law law that
-2\sqrt2\pi(\frac{1}{\sqrt{h}}-\frac{2}{3}\sqrt h+\frac{1}{9}h^{3/2})\frac{dh}{dt}=1
What I have done so far:
V'=\frac{1}{9}\pi(h-3)^2h'
A cup of tea is removed from the fridge and left on a desk. The temperature of the room is constantly E and T(t) represents the temperature of the tea after t minutes.
dT/dt = K(E-T) Z(t) = E-T(t)
How do I find the general form of Z and T?