Reading Definition and 614 Threads

Homework Statement so I have been working on this problem : Diameter1 at wide end: 8cm || V1 = 1.56m/s Diameter2 at narrow end: 3cm || V2 = 11.094m/s Force exerted on plate = 87N Find the manometer reading Picture below: Homework Equations P1+(1/2 ρv1^2)=P2+(1/2 ρv2^2) 1 − 2 = (2 −1)ℎThe...

I am a mechanical engineering student who got a master offer in space science recently. This master course is more like astrophysics. So if I want to systematically study astrophysics, where should I start and which books should I start reading first of all? Thanks!

Hello I am very new to programming and fortran. I have a text file formatted the following way: Name Peter John Sally Joseph Luke Vader etc... age XXXX XXXX XXXX XXXX XXXX XXXX XXXX height XXXX XXXX XXXX XXXX XXXX XXXX XXXX weigh...

I am completing a science fiction novel. The novel takes place in a universe that is twin to ours. Two children and a bitter maid--via scientific accident--were scanned and copied through a tear (created by resonance) in the membrane separating this universe and my make believe universe. In...

I am at a bit of a loss at how to deal with the logic of a 60-1 or 60-2 (60 tooth wheel missing 1 or 2 teeth as an indicator of position) read by a VR sensor. I'm currently employing an Arduino, though later I may change platform.. I can have the sensor on an interrupt, but how do I detect...

I've been studying graduate level Linear Algebra from Steven Roman's Advanced Linear Algebra (Springer, GTM). It is a terrific book, but many of the concepts are extremely abstract so that I find it difficult to retain what I've learned. Can anyone point me to some books/reading on the...

I have to build a digital peak flow meter. I have two models based on calculations ( ideal). I have noticed that the flow rate on the model with a tighter constriction has a greater value than that of a much broader constriction. While testing it out, i noticed air resistance from the first...

Question: On the Moon, the force of gravity on an object is only about one-sixth of its value on Earth. Decide whether each of the following would give an accurate measurement of the mass if used on the Moon a) A beam balance like the one in the diagram at the top of the page b) A balance...

Homework Statement A conservative force F(x) acts on a 2.0 kg particle that moves along an x axis. The potential energy U(x) associated with F(x) is graphed in the figure. When the particle is at x = 2.0 m, its velocity is –1.2 m/s. (a) What isF(x) at this position, including sign? Between what...

Homework Statement The diagram shows a rigid conducting wire loop connected to a 6.0 V battery through a 6.0 V, 3.0 W lamp. The circuit is standing on a top-pan balance. A uniform horizontal magnetic field of strength 50 mT acts at right angles to the straight top part of the conducting wire in...

Homework Statement (a) In the circuit shown below E is a cell of source (internal) resistance r and the resistance of R is 4.0 Ω. With the switch S open, the high resistance voltmeter reads 10.0 V and with S closed the voltmeter reads 8.0 V. Show that r = 1.0 Ω. (b) If R were replaced by a...

Homework Statement A power supply used in a laboratory has an EMF of 5000 V. When, however, a voltmeter of resistance 20 kΩ is connected to the terminal of the power supply a reading of only 40 V is obtained. (a) Explain this observation. (b) Calculate (i) the current flowing in the meter and...

Homework Statement In the circuit below the batteries have negligible internal resistance and the voltmeter V has a very high resistance. What would be the reading of the voltmeter? Answer: 9.6 V. 2. The attempt at a solution I used the Kirchhoff's rule: the current that flows from 10 V is...

Homework Statement The 4.0 V cell in the circuits shown below has zero internal resistance. An accurately calibrated voltmeter connected across YZ records 1.50 V. Calculate (a) the resistance of the voltmeter, (b) the voltmeter reading when it is connected across Y'Z'. What do your results...

Homework Statement The light-dependent resistor (LDR) in the circuit below is found to have resistance 800 Ω in moonlight and resistance 160 Ω in daylight. Calculate the voltmeter reading, Vm, in moonlight with the switch S open. If the reading of the voltmeter in daylight with the switch S...

I've just reached the opening in chapter 2 wherein there's a brief discussion of concepts and math which should be familiar to the reader (Basic SR stuff it seems), and I'm not familiar with it unfortunately. I am familiar with future and past light cones, and the language of causality, but not...

Can someone teach me how to read this stopwatch. Help me fast please.

I have an https://www.cantonracingproducts.com/cgi-bin/commerce.cgi?preadd=action&key=24-026, which is a mechanism which acts as a reserve supply of oil, if pressure should drop too far, at the end of a hose, connected to the rear of one of the...

A user types a word and a number on a single line. Read them into the provided variables. Then print: word_number. End with newline. Example output if user entered: Amy 5 Result should read as: Amy_5 import java.util.Scanner; public class SpaceReplace { public static void main (String []...

Homework Statement I am having a bit of trouble interpreting flow charts given in my biology question sets. Given the following stimulus: The question is : In which of the following options does each substance play two different roles in the series of events from plaque ruprture to MI? ADP...

Any suggestion?

Hi, I've just finished secondary school and am keen to learn some physics before going on to college. As part of this I've just finished reading 'The Theoretical Minimum' by Leonhard Susskind and George Hrabovsky. The book was a really helpful introduction to classical physics and the maths...

Dear Physics Forum friends, I am an undergraduate at US actively pursuing mathematics and microbiology. Recently, I started to evaluate my methodology of reading books in the mathematics, which raised me some concerns and worry that I want to share with you, and seek advice from you. Whenever...

I wonder if it is correct to read an open air manometer in the case of viscous fluid in the following (usual) way. Consider the situation showed in the picture where a viscous fluid is flowing, in fact ##z_C <z_A##. The reading of the manometer would be ##p_a=\rho g z_a##, ##p_b=\rho g z_b##...

My professor wants to give me (and another kid) a problem in quantum cosmology. To that end, he asked me to read through his recent paper that appeared in the Physical Review Letters. He said that I should be able to go through it since all the paper employs is (quantum) scalar field theory...

In the afternoon, Beth read 100 pages at the rate of 60 pages per hour; in the evening, when she was tired , she read another 100 pages at the rate of 40 pages per hour. What was her avg rate of reading for the day? I can't understand why are we not finding avg time? Homework Equations S= v *...

Homework Statement Here is the seismogram in question: http://postimg.org/image/iu0dozetn/ There are many parts to this question, but I only need help with this one: Measure the S wave arrival time. Homework Equations NA 3. Attempts at a Solution I know that the P waves arrive at 40...

So I am transferring from a community college to the university after this coming semester for a physics degree. Being a transfer student I am expecting to be at a disadvantage when compared to the other students at the school. I have had Calculus based physics 1 and 2 which mainly is focused...

I've been learning the absolute basics of a few programming languages and feel like I want to start taking a more "practical" approach to learning, so I've been looking into source code. My question is pretty simple, where do I start? How do I identify the structure of the files that go into...

Homework Statement Let’s say you know that the input signal will be about -0.25 V. What range should you select to give maximum deflection without going off scale? Draw a line, with a straight-edge, on the picture above, showing how the pointer would point. Below is the picture of the analog...

Homework Statement [/B] there are four moving objects, whose graphs are pictured in orange color. I forgot to mention that the image, from the book, shows (y-axis) is denoted by x metres. The (x axis) is denoted by t seconds. One could say that these hint towards the idea, that distance...

In discussing proportions (a topic to which I have not been properly exposed) Legendre states that, adding the antecedent of a proportion to the consequent, and comparing the sum to the antecedent, one obtains a proportion equal to the original plus unity. Legendre's book is apparently...

I am trying to make a part of my following code to work but so far I haven't been successful... I have 1 tree file with several branches but the two I care about are named Trigger and Variable. I have calculated in two histograms h(Variable) the weights I want to obtain. My function that I am...

http://www.usnews.com/news/blogs/data-mine/2016/02/10/how-us-students-stack-up-in-math-reading-and-science Big report just came out!

http://schems.com/bmampscom/fender/HotRod_DeluxeIII_schematic_Rev-B.pdf This is a Hot Rod Deluxe amp and has a low distorted signal at the speaker. (some info on the schematic is for a Deville) I injected a 1000 cycle signal at 100 mVpp at J2 and have a clean signal on the grid of V1A, V1B...

I have a three phase alternator and I used a digital voltage meter across the output terminal and the reading went from OL to 4000 volts to 3000 volts and quickly decreased to zero volts, then went through the range again starting from OL. It continued to do this, I thought the meter could have...

Mod note: Thread moved from HW section 1. Homework Statement My native language is not English,and I'm not good in reading hand writtings.I got a short passage on mathematics.Please tell me if you could help me with that.I've attached it as "Lif.pdf".Homework EquationsThe Attempt at a Solution

Hope all you students are enjoying the break. What's on your reading list? -I'm working through Feynman's "Classic Feynman" which has been very enjoyable, as well as trudging through Kline's Calculus. It is rather wordy, but I like the approach it has. I also just discovered 'Understanding...

Dear Physics Forum personnel, I am a collegiate junior at US with double majors in the mathematics and computer science, and an aspiring theoretical computer scientist. My current courses in the analysis and linear algebra, and undergraduate research in the theoretical computer science fired...

Dear Physics Forum advisers, I am an undergraduate student in US and an inspiring applied mathematician in the fields of theoretical computer science. I recently have been reading a book called "Joy of Learning" by Hironaka Heisuke, a mathematician and Fields Medalist (1970); the book seems to...

Could be a book, research paper or website, the focus is on the contradiction and compatibility of the two (?) bodies of physics.

I'm on final of the chapter 7 yet, but i want to know when i finish this book, which book i should get to continue to learn the math necessary to more advance topics(GR, Condensed Matter, EM Theory(Jackson level), Analytic Mechanics and others..)? and if exists a book like Boas i would be so...

Homework Statement Homework Equations n/a The Attempt at a Solution I understand how to read the truth table. I understand that A, B, C, D are the inputs where 10 possible inputs are shown. However, with little to no sources available, I am lost on behalf of how this image came about to...

First post here, thank you in advance. I'm interested to know more about current, or the energy that manifests itself as heat, light, magnetism by way of electrical intervention, primarily with respect to what it really is. I've read through some very fascinating posts about this, and there...

I'm looking for suggestions of resources to learn introductory E&M and "modern physics" (I'm thinking relativity, QM, particle) conceptually. This learning is out of self interest. While my focus is for conceptual understanding, this doesn't mean any suggested resources should be devoid of...

Good evening. I recently was taught how to use our new water activity meter, and I noticed something strange. This meter uses changes in the reflectance of a mirror. Whenever we'd bring the sample up to temperature, the measurement would reach a low point, then at about 0.5° below our set...

I'm confused about "R34 2 PL" means. I'm guessing the radius of the round is 2mm and the curve is a quarter of an ellipse like so: Am I right?

Homework Statement let's say you have a regular bathroom scale, which we know measures the normal force that it exerts on a person aka. apparent weight. Now let's say that we didn't know that it measured the normal force when a object was on it. Obviously we still know that the only two forces...

I am starting to learn Quantum mechanics. I can't wait for my completion of QM, as I am running behind all the concepts taught in the class; but I can't even go on studying chemistry, or I can't even analyse anything, without understanding the atoms in reality. I believe in (Russell's??)...

I listened to the audiobook version of The Beginning of Infinity by David Deutsch on a recent vacation. I'll always associate the drive from Seattle to Gold Beach, Oregon with Physics! I've read some of Stephen Hawking's and Brian Greene's books, but the way David Deutsch worded some of his...