Urgent Definition and 393 Threads

I have six weeks (19 school days) to teach half-a-course worth's of material to the students who failed Conceptual Physics. I have five days to teach: What is physics, the concepts and some basic problems of linear motion, and all three Newton's laws. Alas, the first three days haven't...

Hello i need to know what should i do, Consider i have a box, top half and bottom half. so now i have to hold the top half and bottom half together with the rubber band then how do i know what rubber band will be enough to exert force so that both parts of box are hold together. also i...

Urgent!How to find the point where Maximum Curvature occurs on graph? Homework Statement The graph(2D) is plotted from experimental data, not from a given equation and within certain limit. I want to know the x&y coordinate where the maximum curvature occur via software means, not manually...

Model NO: LG-VX11000 Battery model: LGLP-AHLM Battery states Lithium-Ion Polymer Battery 3.7V 950mA I do not have my charger.

Homework Statement In Fig. 8-28, a small block of mass m = 3.0 kg can slide along the frictionless loop-the-loop. The loop has radius R = 0.80 m. The block is released from rest at point P, at height h = 2.9R above the bottom of the loop. I attatched a picture (a) Find the speed of the...

Hi, I am programming a command line program in Java. When I try to use System.out.print to print a single quote character, it outputs æ instead. So I get output like Johnæs height is 1.72 m instead of John's height is 1.72m I tried using escape sequence and i get illegal escape...

Hello, I need to do power flow and short circuit analysis for a AC/DC system, I need A recent version of ETAP. I already have ETAP 6 but I need recent one. Please help me.

Homework Statement Prior to entering a combustion furnace, air is heated up from ambient temperature (25 °C) to 250 °C. This change in temperature causes the specific enthalpy to change to 3745 J/mol. Assume that the pressure of the air leaving the heater is 150 kPa and the flow rate is 1.3 m3...

Homework Statement You shoot a cannon at a distant cliff. The cliff is 170m high and 550m away, with the launch speed of the projectile being 110 m/s. Wind resistance is ignored. At what angles, relative to the horizontal, should the projectile be shot to hit the target? Hint: 1/cos2θ =...

I have to find current on part of a circuit using thevinins theroem with polar and rectangular coordinates. Circuit is attached Sorry - this is a large amount of working and I can't really type it all out. Nor can i type out a circuit diagram. Find attached the question as well as my...

I'm Kind of worried ..I am a poor Uni student and my net has been recently disconnected due to me not being able to pay the bill, I'm at an Internet cafe at the moment and I'm running out of money to stay here. I found out I have a physics home assignment due today (in about 6 hours) I know...

I am currently enrolling on a BSc Natural Sciences: Physics Pathway with the Open University in the UK and am a UK resident. Just discovered that they have another degree: BSc Mathematics and Physics. In respect to future opportunities which degree should I study? Shall I stick with the...

Urgent Question Soil Mechanics -- Please Help Homework Statement A saturated over-consolidated silty clay is estimated to have the effective strength parameters c'=5 kPa ∅'=25 kPa A specimen of the silty is mounted into a triaxial cell and full consolidated to 400 kPa with a cell...

Find the sum upto n terms: 1.3.5+3.5.7+5.7.9....tn I solve it this way: tn=(2n-1)(2n+1)(2n+3) Now can I take summation on both sides? How? I mean when I add 2 on both sides the resultant is 0(2-2=0).Similarly the resultant summation will be zero? And if I take summation I get...

Hi all, I am having trouble finding a website/researching to find more about how I can improve this system: http://www.waterfortheworld.com/file...ion_Manual.pdf SPECIFICALLY I need help to think of how to have a cover on the filter or have a cap/nozzle on the hydroxide solution-if it is...

Hello Astro community, I really need help with few assignments! First one would be about Supernova: In a distant galaxy a supernova flash occured. When supernova reached luminosity maximum, galaxy apparent magnitude was 17,6. Before the supernova flash the galaxy apparent magnitude was...

hey guys, I would like to know about reynold's number for a wing I have designed a NACA 4412 wing which has wingroot = a , wingtip = b and winglet tip = c (a,b,c are any integers or decimals) please tell me the formula of calculating D for the eqn of reynolds number = ρVD/μ additional...

A group of students decided to use AAS to analyze three different brands of iron tablets to determine their content. They placed a tablet in a 100 mL beaker with 6 mol/L HCl and covered it with a watch glass and heated slowly for 15 min. They then filtered the solution into a 250 mL volumetric...

Urgent help needed with finding angular speed? This is impossible! I've even asked on Y!A and THEY all got it WRONG. Webassign says the answer is 32.9 but how? This is so freaking frustrating...anlfdsfjlkdjf Ok...so what I tried doing was ask myself what the equation for angular speed was.ω...

What is the period "T" in this equation? Or how do I solve for it? 1) This is what I did. ac (first column on excel) ac = v2/r ac = (2πr/T)2/r mhg (second column on excel) 0.07155(9.81) = 0.7019055 0.10422(9.81) = 1.0223982 0.11394(9.81) = 1.1177514 0.13392(9.81) = 1.3137552...

#7. This is what i tried to do... but I got it wrong :( Please help T ≈ 2π√(L/g) 1.31 = 2π√(L/9.81) 1.31/2π = √(L/9.81) 2.057 = √(L/9.81) 2.057² = L/9.81 4.2343 = L/9.81 4.2343(9.81) = L 41.54/1000 = L 0.0415 = L "INCORRECT: Your response differs from the correct answer by more than 100%. "

Homework Statement You are driving home from the cottage and pulling a trailer behind your car. There is a steep hill with a 12 degree incline that you must drive up. You read the instructions for the trailer hitch which keeps the trailer attached to your car. The hitch can withstand...

Homework Statement Find the general solution in terms of Hypergeometric functions near x = -1 : (1-x2)y'' - (5x2 - 9)/5x y' + 8y = 0 The Attempt at a Solution Here the coefficient of y' contains 9/5x which causes problem. The general form contains the coefficient of y' as A+Bx How do I solve this?

A cart with a mass of 340 g moving on a frictionless linear air track at an initial speed of 1.2 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision, the rst cart continues in the same direction at 0.66 m/s. (a) What is the mass of the second...

Homework Statement An atwood machince has a m1 = 4.92-kg block resting on a frictionless horizontal ledge. This block is attached to a string that passes over a pulley, and the other end of the string is attached to a hanging m2 = 2.46-kg block. The pulley is a uniform disk of radius...

Urgent help needed with F=ma concept! Where did I go wrong?? Help please Use the exact values you enter to make later calculations. A group of students performed the same "Newton's Second Law" experiment that you did in class. For this lab, assume g = 9.81 m/s2. They obtained the following...

Homework Statement http://puu.sh/1faG5 Homework Equations The Attempt at a Solution http://puu.sh/1faFD I labelled the nodes ^^. I redrew the circuit based on the nodes, I ignored the 10 ohm resistor because it short circuits. (Note: I drew the series resistors in reverse order, 80 ohms...

<< Original post restored by Moderators after being deleted by riseofphoenix >> While you are packing up to drive to school, you forget your laptop on the roof of your car. As you are driving west towards school at v = 45 mi/hr, you suddenly remember the laptop, roll down your window, and put...

the energies of light quanta increase gradually as the color of light changes. Of the following metals, which has the largest energy change: sodium, barium, calcium, strontium, lithium, potassium, and copper (ll) I need this within half an hour :cry: I'm guessing it has something...

I was writing personal statement for chemical engineering and I was thinking of a good reason for my choice. I can't come up with anything other than the fact that I really enjoy Physics, Chemistry and Maths. I really want to do chemical engineering and I want to make sure that I get in this...

Help please! simple Physics frictionless crate on ramp problem! Urgent!? A crate of mass m = 100 kg is pushed at constant speed up a frictionless ramp (θ = 30.0°) by a horizontal force F. What are the magnitudes of (a) F and (b) the force on the crate from the ramp? So my teacher did this...

Help please! simple Physics motion in one dimension problem! Urgent!? A rock is shot vertically upward from the edge of the top of a tall building. The rock reaches its maximum height above the top of the building 1.60 s after being shot. Then, after barely missing the edge of the building as...

Homework Statement Im a first electrical eng student learning nodal analysis.I require help with a specific problem from fundementals of electric circuits.Please explain step by step as i am new to this.Please see the attachment for the problems. I am finding it hard to express the voltages...

This is for an assignment, (not sure if its in the right section) but anyway I'm considering the system response to H(w) = 10/(jw + 10) when the input is x(t) = 2 + 2*cos(50*t + pi/2) so I know that Y(w) = X(w).H(w) but I'm not sure what to do about the '2 + ' in the input. I know that...

Urgent! projectile motion Heyy every1 Q Exactly 2.7s after a projectile is fired into the air from the ground ,it is observed to have a velocity v = (8.8i+4.5 j) m/s where the x-axis is horizontal and the y-axis is positive upward . a)Determine the horizontal range of the projectile...

The Problem. 12-101 Hibbler dynamics 13th edition. It is observed that the skier leaves the ramp A at an angle θA=15 degrees with the horizontal. if he strikes the ground at B, deterime his initial speed VA and the speed at which he strikes the ground (at B)...

Homework Statement a man holds a 5.00kg weight in his hand. His arm is represented here by a pair of thin rods attached with a hinge, with a cord for the bicep muscle. The forearm makes a 20 degree angle with the horizontal, and the bicep (which is attached 4.0 cm away from the elbow joint)...

Homework Statement Determine if the following relation is reflexive, transitive, symmetric or anti-symmetric. (A,B) element of R(relation) if for every epsilon > 0, there exists a element of A and b element of B with |a-b| < epsilon. Homework Equations The Attempt at a Solution I already...

Hello Guys could you please help me to find the hypotenuse for the red triangle please. regards

Lorenz Curve question. HELP HELP! Urgent? If a country has a coefficient of inequality (CI) of 0.99, describe the graph of the Lorenz function in relation to the line y=x. Hence comment on the income distribution.

Good afternonn, these are the motor and circuit data: Motor power: 0.37kW, Nominal current: I= 0.8 A voltage: 415 V, cable length = 80m ambiant temperature: 50°C Maximum voltage drop percentage =415*4% =16.6V According to the Bahraini Regulations: - temprature factor= 0.89 - core...

Homework Statement A student is experimenting with a bicycle wheel. He turns the bicycle upside down and spins the wheel in a vertical plane at a constant rate. The diagram shows the wheel. At the place where the experiment is performed, the Earth‟s magnetic field is in a horizontal direction...

Ok So I was told to think about what would happen if you tried measure something with a metal ruler or tape measure in an environment that would cause negative linear expansion; so the ruler gets smaller. How would the accuracy be affected if the tape measure/ ruler was calibrated at a greater...

Urgent Aero question help! I can't seem to do this question without the static pressure given. Can someone show me the workings and how it is done? I can't seem to do this question without the static pressure given. Can someone show me the workings and how it is done? Question >>...

Hello people, I couldn't find a direct answer anywhere. Can nuclear fusion create any radioactive substances. Please answer this is detail. Thanks.

Homework Statement Well I have written my entire program for my assignment, but I cannot get it to compile without multiple instances of the same error: "expected primary-expression before ']' token. Can anybody see a mistake I am making? I would greatly appreciate your help, thank you...

Hi, On a conducting planar surface, with a plane wave illuminated,(s for scattered field, i for incident field) in spherical coordinates under the tangential boundary condition that: E_{s}(\theta,\phi)=-E_{i}\theta,\phi), which is E_{s,\phi}(\theta,\phi)=-E_{i,\phi}(\theta,\phi) and...

I'am doing doing a persuasive speech on the manned space program. I have a general outline starting with the history of NASA : space race, cold war, Apollo landings etc. I then go on to talk about the decline in manned space exploration and then switch to space probes and robotic exploration. I...

Greetings. My friends and I are working on a "mechanical to electrical energy" project, and we're facing a huge problem with the basic design of our system. Basically, we wanted to make use of a system where a person would 'step on' a pedal or a tile, whatever you may want to call it, which...

Homework Statement I am not completely finished with the assignment, but I was trying to test to make sure that my functions "low" and "high" would in fact return the proper value (the lowest number in the array, and the highest number in the array, respectively). However, when I compile, I...