Urgent Definition and 367 Threads

Physics Quiz...very Urgent! 1.As a rocket rises its acceleration increases. Why does this happen? (assume that the acceleration due to gravity and air resistance are nearly constant during the ascent) 2. If the head of the hammer is loose, and you wish tighten it by baging it against the top...

Urgent probability questions! Please help! How can 5 black and 5 yellow balls be put into two urns to maximize the probability that a yellow ball is drawn from a randomly chosen urn? I got: P(draw yellow)=P(draw yellow intersect urn1)+P(draw yellow intersect urn2) =P(draw...

Homework Statement I have an exam coming up on Monday, and I can't seem to solve this question. Please point me in the right direction. x=e^{i\alpha}, y=e^{i\beta} z=e^{i\gamma}. If x+y+z=xyz, prove that, cos(\beta -\gamma) + cos(\gamma -\alpha) + cos(\alpha -\beta) + 1=0 Homework...

Urgent help with amplifiers please! Hi, Please I need help for this problem. It is due in few hours! The main problem is that I don't succeed to visualize the problem to make a drawing. please, can someone help me? (the context of the course is microelectronics on amplifier) A...

Hi everyone,:smile: I'm new to this forum so please don't throw any stones if my question is too naive. I have this problem and it's urgent that I give an answer very quickly... We have a glass thermometer filled n moles of ideal gas (instead of vacuum). The thermometer has also mercury in...

Homework Statement It is possible for a particle to accelerate without changing its speed. True or False? Homework Equations I don't think there is any except average acceleration equation The Attempt at a Solution I am thinking False because Acceleration depends on...

please check my work... urgent pleasezz 1> ZnCl2 [aq] + 2KNO3 [aq] → Zn(NO3)2[aq] + 2KCl (s) 2> Ca[OH]2 [aq] + 2Na OAc [aq] →Ca(OAc)2[aq] + 2NaOH (s) 3> NiCl2 + 2KOH → Ni(OH)2 [aq]+ 2KCl (s)

Mechanics ;;; please need Urgent help! hi everyone, I'm seeking help from anyone from this forum about my mechanics problem. it's under WORK, ENERGY AND POWER section. A resistive force acts on a cyclist, as she free-wheels down a straight hill at constant speed. The cyclists and her...

I'm posting these as images because it would be difficult to type. If this isn't allowed, please let me know. I really need help with this before tomorrow, when I have a test. Any help appreciated. Homework Statement problem here The Attempt at a Solution I completed part 1 (solution here)...

1. I have to study for a test. To prepare to study, I decided to look around in my bookshelf for textbooks and to my surprise, found an old handout. I've typed out the questions and my response (answer) to those questions as itactalized. Please feel free to correct/help me :) PS: Ignore...

3 Dynamic Physics Questions Urgent Help Needed! Homework Statement Problem1 An object of 6kg is moving towards the south. The resulting force that the object has is 12 Newtons towards the north. What is the acceleration of the object? Homework Equations f=ma fg=mg The Attempt...

The relative humidity is 55% on a day when the temperature is 30.0°C. Using the graph below, determine the number of moles of water vapor per cubic meter of air. on the graph, Vapor pressure of water is on the y-axis and temperature on the x-axis 30C cordinates with 4200 Pa of water vapor...

I'm currently doing a course in complex analysis and we're using fundamentals of complex analysis, by saff and snider. https://www.amazon.com/dp/0139078746/?tag=pfamazon01-20 And Our problem sets are from the questions at the end of the chapters. I'm finding these questions incredibly hard...

Suppose the skin temperature of a naked person is 34°C when the person is standing inside a room whose temperature is 25°C. The skin area of the individual is 2.0 m2 a) Assuming the emissivity is 0.80, find the net loss of radiant power from the body b) Determine the number of food...

Urgent help need.Please ! Heat question [b]1. During an all-night cram session, a student heats up a one-half liter (0.50 10-3 m3) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 20°C, and the beaker is filled to the brim. A short time later when the student returns, the...

Forgive my rusty English. But I really need urgent and Professional help, teachers and professors, please: A satellite has been put on Earth's orbit at a high speed, (forget atmosphere friction, forget moon attraction, forget sun gravity), theoretically, without any further thrust, will it...

Hey Guys! I was wondering if anybody could help me. I have a few questions, i solved the second problem(my work is shown at the end) Here are the questions: 1. For ionic salts (A+ B-) the inter ionic potential can be approximated by Φ(r) = (K/r^n) -/+ (e^2/ 4pi ε0 r) with n~ 10 where K is a...

well guys, i just found this forum and am hoping you can help me here. i am intl student with bs in elect eng. but i realized when i entered that program that it wasnt for me n that shd have stuck with my math/physics. i ended up with some sloppy gpa, probably just above 3.0:mad: but now...

Homework help, please! Urgent This is the question from my physics 11 class, it has completely stumped me, i have done about have the question, i just get stuck when it comes to proving that the persone has or has not caught the bus. here it is: A personne walking at a speed of 1.7m/s...

Homework Statement There is an object that is 10kg. This objects initial speed is 10 m/s. The friction working against the object is .1---What is the distance to when the object stops moving? Homework Equations The Attempt at a Solution u(k)= f(k)/N...The N, i think, is 100...

I am doing a project on GW Detection , pls tell me if there is anyway I can prove GW presence at project level (as in apparatus shouldn't be too buly or big as like LIGO or somehting ) ...I have built a Michelson Interferometer , but how do I prove there is a distortion in spacetime using...

I totally need urgent help on these exponential equations. I am so confused write now. I know that the bases for each equation has to be the same and that is x is squared you have to factor or use the quadratic formula to find the solution. I also know that the general steps to solve these...

I need an off the shelf DVM and Lab Power Supply that can be connected to a PC to firstly log the DVM output and secondly to Switch the PSU on and off dependent on the PSU terminal voltage/current. I could do an internet search, but I have to get the spec out ASAP and haven't started it yet...

Urgent help needed, please! Circular motion Suppose the surface (radius = r) of the space station is rotating at 42.7 m/s. What must be the value of r for the astronauts to weigh one-half of their Earth weight? My soln: Let // represent square root V = // (GMe/r) I divided Me by 2...

1. 3. Homework Statement What would happen if a plant could not obtain enough of the following nutrients from the soil? a) Potassium b) Nitrogen c) Phosphorus 5. How can using fertilizers to improve crop yield impact on the evironment 6. Carry out some research to identify...

Urgent! HELPP! A/D converters - succesive approx. An input analog signal has a 4.78 V instantaneous magnitude, held by an S/H circuit, which is applied to a 6 bit succesive approximation ADC with range : 000000 output for 0 V input 111111 output for 12 V input Follow the succesive...

Do anyone know a guide about visual programming (gui) in VisualBasic. Net? It is really urgent. Thanks in advance..

Homework Statement A plane wave generator with a freqenecy of 60.0Hz creates a water wave of wavelength 3.0cm in region A of a ripple tank. The angle between the wave crests and straight boundary between regions A and B is 25.0 degrees in region A and 14.0 degrees in region B. Find the speed...

My last question that needs to be completed today.. Determine the charge to mass ratio of the (pi)- particle of He (3 nucleons) 2 electrons. The charge to mass ratio of the electron is 1.76 x 10^11 C/kg Equation: q/m = charge to mass ratio all sub atomic particles have a charge of +/-...

I'm editing a school textbook and have suddenly discovered at the 11th hour that there is a difference between the U.S. cup (236ml), the Canadian cup (227ml) and the British cup (284ml) as well as conflicting results (such as Wiki) that define them differently again - U.S.=250ml, Canadian=240ml...

hi I know about harmonic oscilation, but I'm having trouble understanding how we derived formulas for gravity pendulum. Please read on. If a ball on a string ( string is attached to the ceiling ) is displaced from its equilibrium position by angle A1, then forces on this ball are...

Hi I need help with this problem I have some trouble with partitions: Homework Statement The context is Discrete math /relation Which of these collections of subsets are partitions of the set of integers? 1- The set of even integer and the set of odd integers. 2- the set of...

Urgent Help Needed! (gases) I need some urgent help with figuring out how to find the distance which 2 gases will meet in this question.. Given: Samples of HBr gas and NH_3 gas are placed at opposite ends of a 1.80 m tube. Question: If the two gases are allowed to diffuse through the tube...

The lead female character in the movie Diamonds Are Forever (lol so random) is standing at the edge of an offshore oil rig. As she fires a gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.010 kg and its velocity is +720 m/s. Her mass (including the gun)...

(a) show that the vector (2,7,6) be we written as a linear combination of the vectors (1,3,2) and (0,1,2) (b) show that the vector (-1,0,4) can be written as a linear combination of the vectors (1,3,2) and (0,1,2) (c) show that Span((1,3,2),(0,1,2)) = Span( (2,7,6), (-1,0,4))...

Greating my friends, I have just returned home today from heart surgery. I still feeling the effects of the operation, because I'm affried the hospital send me home a bit to early. But I have to have these questions finished before tomorrow. So therefore I would very much appreciate...

I NEED A [SIZE="3"]DATASHEET OR LIST OF ABOUT [SIZE="3"]50 EACH OF [SIZE="3"]RESISTANCES, DIODES, CAPACITORS, ZENER DIODES AND ICs WITH S[SIZE="3"]PECIFICATIONS LIKE VOLTAGE, CURRENT AND POWER RATING, COMMONLY USED IN ELECTRONICS LABORATORY OF COLLEGE LEVEL I NEED IT [SIZE="3"]URGENTLY WITHIN...

Hey Folks, Can someone please draw me this circuit to a scheme for drawing it on a pcb maker ? I need it urgently, so please help Regards & Respect

hi, i have a qns as follows, any help will be great apperciated. A helium nucleus of velocity " v" enters a magnetic field and moves in a circular path of radius R. A proton having the same initial velocity that enters this magnetic field will then move in a circular path of : a. R/4 b...

A man of mass "m" on an initially stationary boat gets off the boat by jumping to the left in an exactly horizontal direction. Immediately after he leaps, the boat of mass "M", is observed to be moving to the right at speed v. how much work did the man do during the leap ( both to his own body...

Consider the volume V bounded below by the x-y plane and above by the upper half-sphere x^2 + y^2 + z^2 = 4 and inside the cylinder x^2 + y^2 = 1 Given vector field: A = xi + yj + zk Use the divergence theorem to calculate the flux of A out of V through the spherical cap on the cylinder...

A car of mass 1500kg arrives at the foot of a straight hill traveling at 30m/s. it reaches the top of the hill 40 seconds later traveling at 10m/s. The length of the hill is 1km and the gain in height is 120metres. The average resistance to the motion is 500N. Find The average power developed...

A thin film of oil (n = 1.10) is located on a smooth, wet pavement. When viewed perpendicular to the pavement, the film appears to be predominantly red (640 nm) and has no component of wavelength 569 nm. How thick is the oil film? I have tried using 2nt=(m+1/2)wavelength but am having...

Hello. I've got a QFT final tomorrow, and one question is still bothering me. Consider two lagrangians. The first one is L = \frac{1}{2} D_{\mu} \vec{\phi}.D^{\mu} \vec{\phi} + \frac{m^{2}}{2} \vec{\phi}.\vec{\phi} - \frac{\lambda}{4} \left(\vec{\phi}.\vec{\phi}\right)^{2} The second...

Hey I need help from this as soon as possible. My teacher has given me 2 equations and I need to use them to estimate the time of death of a discovered corpse. 1. \frac {\Delta T_{1}}{\Delta t} = -k_{1}(T_{1} - T_{2}) 2. \frac {\Delta T_{2}}{\Delta t} = -k_{2}(T_{2} - T_{1}) I think...

Hi, I don't know if this is the right place but i am facing a strange problem with my T290i. It is just kept and it just reboots by itself. I do nothing. Once this happened I switched it on it said Charging error stop charging. It was not connected to the charger. All this happened by itself...

Hey, Just need to evaluate this limit, I know that the answer is 0, but I can't figure out how to prove it. Any help is greatly appreciated. lim(x-0) of (sin(cosx-1))/x Thanks.

Hi guys! well I am stuck at the following problem and don't know how to proceed. Plz help me here is the problem \int\sqrt{\tan{\theta}}d\theta here is what I am doing let u=\tan{\theta} du=(\sec^2{\theta}) d\theta 1+u^2=(\sec^2{\theta}) therefore du=...

Ok, If my angular velocity is negative, does that mean I've stopped and now changing directions in terms of my movement? Thanks.

How many elements of unsaturation are implied by the molecular formula C8H10ClNO? Draw Three structure, one containing ether and amine group, one containing amide group, one containing amine and ketone group. I have no clue where to begin and read the chapter. as long as it is...