Difference Definition and 1000 Threads

Homework Statement What is the difference between a cycle & a circuit? (Definition not reqd, guidance reqd with the figure attached) Homework Equations No The Attempt at a Solution See the attached figure. According to this figure the walk AB, BC, CE, EF, FD, DA represents a cycle or not...

Hello, I still don't really understand what an antiderivative is, besides its ability to "undo" derivatives, its relation to integrals, and what the difference between the two even is. It would also be great to know how to visualize an antiderivative. I've tried looking further into the...

Homework Statement Ned climbs to the peak of Mt. Everest, the tallest peak on Earth at 8850 m above sea level. Ned's mass is 95 kg, the mass of Earth is 5.98 x 1024 kg, and Earth's radius is 6.37 x 106 m. What is the difference in Ned's weight when comparing his weight at the top of the...

I get that a if we have complete information of the state of the system (i.e. all the possible knowledge we could have about it: the values its observables can take and their corresponding probabilities), then it is a pure state and can be represented by a vector (ket), ##\lvert\psi\rangle## in...

Homework Statement The circuit is shown as above. If ε = 3 volt and each resistor has 2 ohm resistance, then what's the potential difference between point B and point D ? A. 4 B. 3 C. 2 D. 1 E. 0 Homework Equations V = I R R series = R1 + R2 + .. 1/ R parallel = 1/R1 + 1/R2 + ... The...

[Mentor's Note: The first 4 posts have been split off from another thread.] I want to know why a electron has a different charge than a positron. lets use an electron and positron that came to be at the same time and place. They should have split something. Can someone explain what it is they...

I understand in an electric circuit electrons in metallic materials move around by being directed by potential differences (fields!) I guess in a microwave circuit photons propagate as waves and are directed around and manipulated throughout the circuit by its geometry? Or have I got this...

I am aware of what positive and negative polarities are but what specifically causes the distinction between positive and negative polarity?

Why will it happen so that-two light sources such that the ''phase difference between the two vibrating sources changes rapidly with time, we say that the two sources are incoherent and when this happens the intensities just add up '' assuming that the wave characteristics of light are significant

What are the difference between them? What is that one in the photo?

Homework Statement Homework Equations Ohm's Law R = V/I V = IR The Attempt at a Solution here is my answer, i have a feeling I am missing something, any help would be appreciated.[/B] The graph represents a linear relationship between the potential difference (V) and the current (A). By...

Homework Statement Write each of the following as an English sentence and state whether it is true or false: a) ∀x ∈ R, ∃y ∈ R, y^3 = x. b) ∃y ∈ R, ∀x ∈ R, y^3 = x. Homework EquationsThe Attempt at a Solution I think both say every real number has at least one cubic root. Maybe the second one...

Hello PF, Can somebody please explain to me the difference between a PhD after a bachelor and after a master's degree in physics. Please explain everything about the difference of duration and of knowledge.

Hi everyone, I have always been confused by momentum and linear inertia. What exactly is the difference between them? Aren't them both resistance to change in motion? Its hard to explain what I am confused with so here's an example: if there are 2 moving cars traveling at the same speed and car...

Hello friends. My question consists two parts, 1-What is the difference between an optical and an acoustic phonon? 1-What are the conditions by which we can decide the type of phonon i.e optical or acoustic phonon ? Hope to get the reply soon.

Homework Statement The difference between Rutherford's and Bohr's theory of atom is ... A. Bohr's spectrum of hydrogen atom is discrete while Rutherford's continuous B. Bohr's stated electron goes around the nucleon while radiating energy, while Rutherford's not radiating energy. C. Bohr's...

Homework Statement Three receivers, with complex impedance \underline{Z_1}=(125+j375)\Omega,\underline{Z_2}=(700+j100)\Omega,\underline{Z_3}=(500-j500)\Omega, and two sinusoidal current generators of effective values I_{g2}=40mA and unknown I_{g1} are connected. When the switch is open...

so i want to enroll in this undergraduate course in physics in a Bulgarian university. But i read that the bachelors also specializes in Nuclear and Particle Physics: Bachelor in Physics (specialization in Nuclear and Particle Physics) so i was wondering how much difference does it make? how...

Homework Statement A metal sphere of radius 15 cm has a net charge of 4.2x10^-8C. At what distance from the sphere's surface has the electric potential decreased by 500V? Homework Equations V = kQ/r The Attempt at a Solution \Delta V\quad =\quad \frac { kQ }{ r } \\ \\ r\quad =\quad \frac {...

In the research,it is found there is significant difference of B-10(n,2a)H-3 reaction cross section between ENDF/B-V and ENDF/B-VI (http://www.nndc.bnl.gov/).The cross section in ENDF/B-V is 10 times less than ENDF/B-VI when neutron energy...

I know that this question has been answered before, but what is the difference between a BA and a BS in physics? Specifically in reference to UC Berkeley. Berkeley only has a BA in physics, but it is not like this is a second rate degree, considering that Berkeley is known for its physics...

Homework Statement Two lightbulbs of resistance R1 and R2 (R2 > R1) are connected in series. Which is brighter? What if they are connected in parallel? Explain. Homework Equations P=V^2/R P=I^2R The Attempt at a Solution I know the solution. In series, P1=I^2R1 < P2=I^2R2, so R2 is...

Is the acceleration : a=Δv/Δt equivalent to a=dv/dt ?? Anx what's the difference between Δ and d and can i use Δ when i want ? a=d2x / dt2 Can we write the same using Δ ?

Can someone explain why the phase difference is zero when the there is equal number of nodes between the two vibrating particles. Thank you

Homework Statement This is a pitot tube . The diffrence in height of the liquid at 2 sections is y = 0.2m ...is the pressure difference between P1 an P2=0.2(density of mercury )(g) ? Homework EquationsThe Attempt at a Solution i don't have the ans for this question , is my answer correct ?

Hey guys! The question is related to problem 2.26 from Electrodynamics by Griffiths (3ed). 1. Homework Statement A conical surface (an empty ice-cream cone) carries a uniform surface charge σ. The height of the cone is h, as the radius of the top. Find the potential difference between points a...

Homework Statement A particle begins in a region where positive and negative charges are uniformly distributed and ends up in a region near a negatively charged plate. What is the sign of the potential difference in this case? Homework Equations N/A The Attempt at a Solution I assumed this...

Homework Statement A plane-wave is incident on an air-glass interface at 30° as shown below. Calculate the phase difference between A and B. Assume λo=1μm. attatched is an image that looks like this. ________________________ --------------------------- A --------------------------- B...

Homework Statement Homework Equations N/A The Attempt at a Solution My question is a simple one: how is the above equation for COPref different to the COPref equations I've already encountered (such as COPref = Qc/Win = (h1-h4)/(h2-h1). Is the above just a different form of these? Or is the...

Atomic mass,molecular mass and formula mass: how are they different and how are they used differently ?

In my lectures and notes my professor keeps writing out density as lbs/ft3 and unit weight as lbs/ft3. For a material such as concrete it could have a density of 167 lbs/ft3 but a unit weight of 103 lbs/ft3. I am confused as to how these two values are different even though they have the exact...

Homework Statement In a double slit experiment, the distance between the slits is 0.2mm and the distance to the screen is 150cm. What is the phase difference in degrees, between the waves from the two slits arriving at point P, when the angular distance of P is 10 degrees relative to the...

Homework Statement Light of a wavelength 548nm illuminates two slits separated by 0.25mm. At what angle would one find the phase difference between the waves from two slits to be 2 rads? Homework Equations σ / λ = ΔΦ / 2π σ: path difference λ: wavelength Δφ: phase difference The Attempt at a...

Hi I've been trying to get a simple solution to the 2D Navier-Lame equations using finite difference on a rectangular grid. I want to see the displacements, u and v, when a simple deformation is imposed - e.g. top boundary is displaced by 10%. The equations are as follows: \begin{eqnarray*}...

Any polarised light's plane is shifted while passing from one medium to another for refraction. So, optically active or not, a solution of any compound will cause refraction because of its density. Then what's special in an optically active compound?

I was reading about ohmic and non-ohmicresistors, but I'm unsure as to what thedifference between them is. I understand that ohmic devices have a constantresistance, meaning the voltage-current graph produced for it will show a straight line and that non-ohmic devices have a changing resistance...

Over lots of studying on particle physics, i came across all kinds of different types of spins, like isospin, spin, weak isospin, and i even learned that there are 3 components for each isospin. Can someone tell me why we need these things and what is special about each component of weak isospin...

There is another topic for this but I didn't quite see it and I don't know how I've gone so far through my course not asking this simple question. So what's the difference? My thought process for hydrogen. I know it can have quantised values of energy, the energy values are the Eigen values of...

And a cartesian axis system in physics? I thought about that and my answer is that a cartesian axis system is the same as a inertial frame of reference, is that true?

Moved from non-homework section, so the homework template is missing. Distance difference between A and B must be 0.25 or 0.75, find length of A and B in any possible value within radius of circle. Is there a name of theory to find this problem? here's my try. for A at any point on...

Homework Statement The electric field in a region of space has the components Ey = Ez = 0 and Ex = (4.00 N/C·m) x. Point A is on the y axis at y = 3.60 m, and Point B is on thex axis at x = 3.00 m. What is the potential difference VB − VA? Homework Equations Vb- Vi = -∫ba E * dS The Attempt...

Homework Statement Two identical parallel-plate capacitors, each with capacitance 10.0 μF, are charged to potential difference 50.0 V and then disconnected from the battery. They are then connected to each other in parallel with plates of like sign connected. Finally, the plate separation in...

Homework Statement why the author ignore the pressure difference at point 1 and point 2 in the energy equation ?pressure at pont 1 must be higher than pressure 2 , right ? as the height of P1 is higher Homework EquationsThe Attempt at a Solution

Homework Statement Assume an ideal diode with ##V_t=0.6##v, find the potential differences across the diode V_ab and across the resistor V_bc as the forward bias voltage is varied from 0 to 10v. Hint: equivalent circuits may be useful Embedding the image wasn't working so...

Two different waves are starting froms points A,B respectively and going to a point C such that $$AC - BC = 2\lambda$$ which corresponds to a phase difference of 4π AC is given 7λ and BC is given 5λ Now the second wave(BC) would need to have an initial phase of 4π so that the two waves can...

I believe this question will be a no-brainer for many members. I want to conceptually grasp how do atoms (and molecules) behave using QM in contrast to the classical physics model. Now there's uncertainty principle and atoms don't have a fixed position and momentum, and that's fine, I know it's...

Can someone differentiate between differet types of expansion, Joule's expansion (free expansion) Adiabatic expansion Joule - Thomson or Joule - Kelvin expansion

I am trying to build up a kind of mind map of the following: Module (eg. vector space) Ring (eg Field) Linear algebra (concerning vectors and vector spaces, from what I understood) Multilinear Algebra (analogously concerning tensors and multi-linear maps) Linear maps & Multilinear maps The...

Hey all, for a function approximation program t run fast enough i need to solve for where the function (represented by a NDDP) is at a minimum (necessary trust me), althogh I have no idea how to go about differentiating it, i tried to break it up from its's general formula (the pi operators and...

Hey all, since I was programming a polynomial interpolater i found it easier to use the expanded divided difference $$ f[x_0 ,...,x_n] = \sum_{j=0}^{n} \frac{f(x_j)}{\Pi_{k}^{n,j \neq k} (x_j - x_k)} $$ , it works, but I can find no proof, any help/ references appreciated. Second question: how...