Components Definition and 949 Threads

Hi, I'm new here. can somebody put here an a schematic of Class AB, D,G or T. I need an audio amplifier that work with bjt and mosfet simultaneously, i think that kind of amplifier is class g, but I'm not sure,for example i saw an 5000w amplifier with 2sc5200 and his pnp pair working with...

So in my physics class we built cardboard chairs as a project. Part of the assignment is to draw in all of the stresses, and then do calculations to see how much stress exists in all of the structural members. One of my main structural members is a triangle, its peak attaches to the main panel...

How many independent components are there to describe the EM field? The six in the field tensor, the four in 4-vector potential or the two when Coulomb gauge is being used? thanks

Hi i am need of some help with a Mechanical Principle question. The Question The maximum load in a tensile test on a mild steel specimen is 94kN. If the test piece is 12mm diameter calculate the ultimate tensile stress. (u.t.s) What is the working stress and greatest allowable load on a...

Hello, I'm working on a problem in topology. I'm supposed to find the number of connected components of the group of 2x2 invertible upper triangular matrices over R which i shall call B_2. I've tried it a bit, but I don't know for sure if my approach (and answer) is correct. Since any...

what are the components of blown film coextrusion die (three to five layers)

Can anyone help me with this question? I would appreciate it. A horse pulls a barge of mass 5000 kg along a canal using a rope 10 m long. The rope is attached to a point on the barge 2m from the bank. As the barge starts to move, the tension in the rope is 500 N. Calculate the barge's initial...

How is the vector g turning into the scalar g? What am I missing that is allowing us to represent g as a scalar quantity and no longer a vector quantity? When going through the algebra to find mg_x, (component of gravity in the x-direction) I don't see how it turns into a scalar of 9.8...

how do i add up 3 different vector components... i tried drawing them up in scale but had NO LUCK...some one please help.

Hello, I'm trying to understand circular motion more intimately. Let's say I have a 1.8 m long piece of twine that I attach to my ceiling and attach a rock with a mass of 650 g from the hanging end. Let's say (with my superhuman coordination) I manage to get the rock spinning in a perfectly...

A boat sails in a straight line 20km [N30°E]. What are the components of its displacement to the north and east? the answers given are 17 km [N] and 10 km [E], but using the formulae Ay = A Sin σ and Ax = A Cos σ, I've got the values mixed up... could it be because I've drawn it wrong? I've...

a particle A is constrained to move in the circular slot of CD.knowing that t=0 the particle A starts from rest and moves so that its speed increases at a constant rate of 0.8in/s^2.Determine the magnitude of its total acceleration when t=2.pls help... thanx...

How do i find the number of independent components of the Riemann curvature tensor in D space-time dimensions. One is given that the Riemann tensor is an (2,2) irreducible rep of GL(4, \mathbb{R}) and obeys Bianchi I R_{[\mu\nu|\rho]\lambda}=0 Been trying this problem for 3 days and...

Hiya all, I'm stuck on a physics question set for homework. It asks "draw vector diagrams to scale to show the vertical and horizontal components of the velocity of the tip of the hand at quater-past, twenty past, twenty-five past and half past the hour." The hand is 20cm long so using the...

I have a problem that includes an acceleration vector 'a' located in the 3 quadrant and it makes an angle (theta) 30 degrees to the Negative Y axis. The solution manual shows the the vector resolved like a = (12.0 sin 30 m/s^2) i - (12.0 cos 30 m/s^2) j Why take the sin of 30 for the...

1.) x(t) = a + b*t y(t) = c + d*t + e*t*t a= 70 cm, b=38 cm/s, c=78 cm, d=17 cm/s and e=-490 cm/s/s What is the initial velocity of this projectile? I approached it assuming that the angle is 45 degrees. So I used the pythagorean therom to solve for the hypotnuse given that we...

Hello, I need help on deriving equations for the moon's acceleration around the earth. I've found that the total acceleration is a=Gm/r^2 (G is gravitational constant, m is mass of moon and r is the Earth to moon distance) what i need to do is split this into its x and y components, and derive...

I know the answers to these problems but I'm having trouble obtaining them: 1)To model a spacecraft , a toy rocket engine is securely fastened to a large hockey puck, which can glide with negligible friction over a horizontal surface, taken as the xy plane. The 4.0 kg puck has a velocity of...

A person is going for a walk and follows the path shown (the red lines). What is the person's resultant displacement, measured from the starting line? Ok, I can solve this using geometry, but I need to knkow how to solve it via physics. The first 2 vectors can be written 100mi+300mj, I just...

I don't know how to start off. What steps do I have to take to solve this problem? I am completely lost.

Okay, here's a problem from my Statics class. Just dealing with 2 vectors, their direction and magnitude given--need to find the same for the resultant vector. If I break it down into X and Y components, I can do it quite easily...but that's not the way he wants it done. It has to be found...

Hi all! Thanks for suggesting some good fluid mechanics and thermodynamics books. I've borrowed them from my library and going to read through then. I would soon need to run a practical project on designing gear boxes. The bad thing is that I am really an idiot in those machine components...

hi all got some problems with vectors so waswondering if anyone can check what I've done is correct thanks question1. find the vector component of 2i+j-k in the direction of i-3j+2k basically i use the rule a=(v*w^)*w^ w^= i-3j+2k / sqrt(14) thus v=2i+j-k therefore a=(2i+j-k)*(...

Hi. Does anyone know of a proof that explains why you can't mix x and y components of vectors? For example you know how if you are solving a physics problem you have to break things up into x any y components (eg: velocity). My physics teacher wanted us to find a proof online that explained why...

Attached is a word document where I am setting out the Ricci tensor components to solve for the terms in the line element equation and get to the Schwarzschild solution. I am overlooking something as I have a sign off in the Ricci components in comparison to the many texts and literature I have...

Spheres A (mass 0.020 kg), B (mass 0.030 kg), and C (mass 0.050 kg), are each approaching the origin as they slide on a frictionless air table. The initial velocities of A and B are 1.50 m/s and 0.50 m/s. All three spheres arrive at the origin at the same time and stick together. a) What must...

i read that Synthetic Pyrethroids are referred to as the "New Age Insecticides". Can anyone explain what are the some of the major chemical components of these insecticides?

pyschoacoustically is it important wether cos or sin harmonic components are used in sound synthesis ?

Why do components and basis vectors transform under Lorentz transformation differently (inverse Lorentz for basis), whereas for orthogonal transformation components and basis are transformed by same matrix? Thank you

I am having a problem with this question. I can't figure out how to approach it. A solid sphere of mass m and radius r rolls without slipping along the track. it starts from rest with the lowest point of the sphere at height h above the bottom of the loop of radius R, much larger than r...

info of different chemical components? are there any places where i can get the info of chemical properties of different chemical components? thanks.

A commuter airplane starts from an airport located at the origin. first it flies to city "A" located a =110km away from the airport in a direction alpha = 36 degrees North of East. Next it flies b =61.8km beta=38 degrees west of north to city "B". Finally it flies c=168 km due West to city "C"...

I have a question. Vector A has x and y components of -20cm and 15 cm, respectively; vector B has x and y components of 10.9cm and -20 cm, respectively. If A - B + 3C = 0, what is the x component of C? I found out that C = -0.73 cm but that's not what the question is asking.

Hi. I'm a newb here. I've got a problem about components of force. Water applies force to the walls of container as it does to the bottom. It has only horizontal compenent when the container is straight (walls parallel) but what about in containers with inward and outward sloping walls? In which...

The speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. An ostrich is running at a speed of 17.0m/s in a direction of 68.0 degrees north of west. What is the magnitude of the ostrich's velocity component that is directed at A. due north...

I just don't get this problem one bit...i've tried drawing a picture too and it doesn't help ...here it is if someone can help! The eye of a hurricane passes over Grand Bahama Island. It is moving in a direction 60 degrees north of west with a speed of 41 km/h. Three hours later, the course...

If you express a wave as a Fourier series like: z(x,t)= \sum _{n=1} ^{ inf.} A_n cos(nk_0 x - \omega (n) t ) Then what is the physical interpretation of a non-zero imaginary part of a component amplitude?

I was told to solve this non graphically. Can this problem be solved non graphically? If so, what are the appropriate steps involved. Really need to understand this stuff. Vector A forms an angle θ with the positive part of the x axis. Find the components of A along x and y if: a. |A| = 8...

Hi - The problem is below and picture of diagram is attached. Could you tell me what is incorrect about my train of thought? I am suppose to express x and y. Find the components of the vector with length C and angle phi as shown, named C vector. Express your answer in terms of C and...

Electrolysis will release the elementary components of a medium, albeit the process required a fare amount of energy, is there any other reasons it would be considered secondary to a more effience process? Does it have any pros?

Two questions: Show that if G' is a connected subgraph of a graph G, then G' is contained in a component. Show that if a graph G is partitioned into connected subgraphs so that each edge and each vertex in G belong to one of the subgraphs, the subgraphs are components. Basically the...

how do scientists figure out the quark constituents of particles, and recognize new quarks when they do?

When a volt meter is placed in a circuit on its own the reading is say 4v. But when a component, 'x', is placed in parallel the voltage drops. Why is this?? Physman

I'm having trouble getting started on a problem assigned to me in my College Physics class. First here's the problem: Four charges occupy the four corners of a square(q1 is in the upperleft hand corner, q2 bottom left, q3 bottom right, q4 upper right). q1 = q3 = -q and q2 = q4 = +q , where q...

Hello, I am having trouble understanding the definition of components and connectivity. Here is the definition I have been given in my text: Alright, I know that a subgraph is a subset of vertices and edges which itself forms a graph. I also know that a path is a subgraph in which no edge...

Hi! I'm new to the forums. I'm taking an introduction to physics class this semester and I've been having some difficulty with it. Oh, I also wanted to let you know that it's been a while since I've taken calculus or any other math class for that matter. But I need physics to graduate. Anywho...

Bonjour, Relativistic current density components are the vector "J" with the scalar "j*c*rho". My questions are: Since it's a scalar and not a vector, what is the meaning of "c" times "rho"? Merci

i was wondering if anyone out their knew if their is a device which reduces amps and not voltage i need something that i can use to controll the amount of amps flowing. thanks everyone

what are the components of light? what are the properties of light? does light have magnetic field? thanx...