physics please HELP !
130,958 results, page 53

Management 330
Please can you help me put an Organizing Paper together: 1050 Word paper  Evaluate the function of management at Delta Airlines as it relates to Physical assets, Human resources and Knowledge. Please cite at least two references 
geography (agriculture)
I have an A.P human geography test tomorrow and i can not figure out what some of these words mean. can somebody please help?? thank you so much. i need help on who carl saur is, mediterranean agriculture, transhumance, pastoral nomadism, and the green revolution.. please help... 
bobpursley, please help me understand
I asked "Show mathematically that to produce an image that is the same size as the object in a concave mirror, the object needs to be at twice the focal length from the mirror." and you answered: "1/o + 1/o=1/f 1/2f + 1/i=1/f 1/i=1/2f i=2f M=di/do= 2f/2f= 1 check my thinking... 
Accounting
what are the outside factors upon which the conclusions drawn from financial statements and financial statement analysis are reliant? Please help!! I'm trying to finish a VERY long accounting paper and got stuck with this question, have no clue, someone please help!! Thanks 
3rd grade science
1)list five ways germs were spread in pioneer days. 2)list the names of the various pioneer diseases.star the ones that make people sick today in north America. Can you please help me with my homework please. 
spanish
please help me , i neeed help writing this in Spanish: My classes are very difficult, and i don't enjoy them mi (mis?) clases muy difícil, y yo no disfrutar de i know this is a messed up sentence, but i'm just giving it a try. can someone please show me how to write this ... 
Chemistry130
Can someone please help me with this question? Propose a possible explanation as to why this trend exists. What characteristics of the elements lead to this trend? We are discussing Ionization energy! She's asking for characteristics like subatomic attractions, electron ... 
PreAlgebra
Please help me. Thanks It's Pythagorean Theorem: A boot leaves port and travels 18 miles north and 15 miles east. How far from port is the boat? I have drawn a picture, 15² + 18² = c² ²= squared. Thanks... meh please someone help mewith this, thanks. 
college
How important is cultural context in understanding an individual's personality? (When responding please consider: How much variability may exist in people within a culture and is it possible to modify an individual's personality through manipulation of their environmentif so ... 
calculus
Please help with this very complicated question! Using 3(x3)(x^26x+23)^1/2, as the chain rule fifferentiation of f(x)=(x^26x+23). Please explain how I find the general solution to dy/dx= 2/27(x3)SQUARE ROOT BEGINS (x^26x+23)/y SQUARE ROOT ENDS (y>0), giving answer in ... 
math
Suppose you plan to make a box that will hold exactly 40 oneinch cubes. what are some demensions of all the possible boxes you can make? I thought of 2 but i can't think of anymore. Here's what I have, are they right? L= 10 W= 2 H= 2 L= 5 W= 4 H= 2 Can you please think of ... 
english
I have to write a short paper on Shakespeare Twelfth NightAct 5 scene 1 lines 248262. But what we have to do is to translate those lines into a different "lingo" dialect but I don't even know how to get started. Can someone please help? PLEASE!!!!!!!!!!!!!!!!!!!! 
Please Help!!!!!!
an engineer designs a satellite dish with a parabolic cross section. The dish is 15 ft wide at the opening and the focus is placed 4 ft from the vertex. find an equation of the parabola. I know how to work this problem, but how do I know that I use the equation y^2 = 4px ... 
math
can someone please help me with this question. Given the funtion f(x)= 3x9 a. find the rate of change between the two stated values for x: 7 to 8 b. find the equation of a secant line containing the given points: (7,f(7)) and (8,f(8)) I think I have (a)answered, just need ... 
calculus
I have two questions, please help. 1. Uss completing the square to describe the graph of the following function. Support your answers graphically. f(x)= 2x^2+4x+7 please show work. 2. Can someone help me to graph this function? f(x)=x^26x+5 Then find the a. vertex b. axis of... 
Math urgent help please!!
You have 500 cm² of material available to cover different shapes. what is the maximum volume of each object that you could make with this amount of material? A.) a cube B.) a sphere I've been stuck on this for so long, please show me how to do this step by step, thanks :) 
Science Please help Ms. Sue!!!
Which of the following does not reduce water pollution? a) cleaning up oil and gasoline spills. b) reducing pollutants such as pesticides and fertilizers. c) increasing the use of gasoline.*** d) properly treating waste water Can you please check my answer? 
Math scientific expressions
Can someone please explain to me what exactly scientific notations are and what I need to know to solve them properly?? Also, provide worked out examples and explain the steps you followed. PLEASE, no joke responses... I just want a better understanding. 
algebra math, 8th grade
If point A is located at (0, 8) and B is located at (4, 5), what is the distance between them? A. 5 B. 6 C. 7 D. 8 I know I don't usually ask for just the answer (I generally give what I got) but this was due on the 6th! I was in the hospital for pneumonia, and I didn't ... 
Physics
Two steel blocks are at rest on a frictionless horizontal surface. Block X has a mas of 3.0 kg ans is attacthed by means of a light taut string to block Y that has a mass of 12 kg. A force of 45 N (E) is applied to block x. Calculate the force block Y exerts on block x. I don'... 
English Grade 11 College
I have trouble understanding of this article and how to answer the questions given. I just started new to school in Toronto; I was living in Turkey for Years So I do please to take your time to look and examine my homework. I greatly appreciate your patience and time and ... 
physics
A person bounces up and down on a trampoline, while always staying in contact with it. The motion is simple harmonic motion, and it takes 2.82 s to complete one cycle. The height of each bounce above the equilibrium position is 40.8 cm. Determine (a) the amplitude and (b) the ... 
Physics(Please respond)
1) A roller coaster (398 kg) moves from A (3.82 m above the ground) to B (29.4 m above the ground). Two nonconservative forces are present: friction does 1.82 x 104 J of work on the car, and a chain mechanism does +5.49 x 10^4 J of work to help the car up a long climb. What ... 
PLEASE HELP PHYSICS!
Two toy ducks attached to each other by a string, are being pulled by a child. The front duck is m1= 5.0 kg and the back duck is m2= 2.0 kg. The happy guy pulls them with a force of 10 N and friction exists. The toys are moving with constant velocity. A) if the coefficient of ... 
Physics
Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes over a frictionless, massless pulley. Block B hangs down vertically. When the two blocks are released, Block B accelerates downward at a rate of 2.030 m/s2. What is the ... 
Physics
Question: A car is on a ramp 100m from the bottom of the ramp (angle of incline=30 degrees): a. If the potential energy of the car is 80902 J, how much does the car weigh? b. What is the KE half way down the ramp? c. What speed is the car moving at the bottom of the ramp? ... 
Physics
A molecule consists of two atoms. The atoms have masses of 20 u and 10 u and are 1.08 *10^10 m apart. How far from the first atom is the center of mass of the molecule? Can someone help please I tried: (20u*(1.08 *10^10m)) + (10u*(1.08 *10^10))/ (20u+10u) and just got 1.08... 
Math
Out of a group of 600 students taking computer,mathematics or physics,there is no student taking both computer and mathematics.Every student takes computer or mathematics.150 take physics and mathematics and 250 take only one of the subjects.Find 1) the number of students ... 
Math
Out of a group of 600 students taking computer,mathematics or physics,there is no student taking both computer and mathematics.Every student takes computer or mathematics.150 takes physics and mathematics and 250 take only one of the subjects.Find 1) the number of students ... 
social studies
Please help me answer these questions, as I have no idea about it. 1) Why do naturalist movements tend to be fractured (why don't they work out...) 2) How does this affect the postcolonial administration of successor states? Please help answer, or provide some websites which ... 
anyone solve it....
Question 1 Describe the following descriptors. Give their type and the value of all their fields: i.dd 01234567h, 789abcdeh ii.dd 30405060h, 70809010h Please remember these things, especially #s 1 and 2: 1. This is a homework help website; please put your subject (math, ... 
Physics please help!!
A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. Forces below are magnitudes. Indicate if each statement is correct or incorrect If M does not accelerate, then T ≤ μsN M will ... 
Physics please help!!
A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. Forces below are magnitudes. Indicate if each statement is correct or incorrect If M does not accelerate, then T ≤ μsN M will ... 
physics please help
a 10.0g marble rolls to the left with a velocity of magnitude 0.400 m.s^1 on a smooth, level surface and makes a headon collision with a larger 30.0g marble rolling to right with a velocity of magnitude 0.100 m.s^1. If the collision is perfectly elastic,find the velocity ... 
physics
A basketball explodes into three separate pieces. Two pieces of equal mass shoot off at 20.3 m/s, one travelling to the south and one to the west, perpendicular to each other. The third piece has a mass 4 times the size of one of the other pieces. What is the speed of the ... 
please check my answer
please check my answer thanks :) You are the manager of The Candle Shop using the FIFO method of inventory pricing, what is the dollar value of the ending inventory if there were 17,000 units on hand Dec 31 Show all of your work Jan 1 5,000 @ $0.89 Feb15 10,000 @ $0.69 April ... 
physicshelp please........
The momentum and the kinetic energy of particle A is eight times and nine times the momentum and the kinetic energy of particle B, respectively. What is the ratio of the mass of particle A to that of particle B? 
Physics
The mass of the sign shown is 28.5 kg. Find the weight supported by (a) the left support and (b) the right support. Between the left and right support is 0.900m and from the right support to the end of the sign is 0.300m.    > (0.900m... 
Physics(semiconductors)
Is electron and hole flow the same in a diode?is the following explanation correct .if not then please provide the correct one When diode is forward biased,the forward current is the sum of electron current and hole current.this current is diffusion current.the electron ... 
Math
Whats a consisnent. like suppose 2,3,6,9,8 Can someone help please? Can someone help please: What are conssitent numbers in math? i need help on my math its algebra 
Algebra one help, please.
Determine which lines, if any, are parrell or perpindicular linea= y=4x line B= y=1/4x line c= y= 4x1 I think line B and A are parrell. Am I correct? Please help me, thank you. 
geometry
8. iN triangle ABC, a point D is on AC so that AB=AD. ANGLE ABC  ANGLE ACB = 30. IND ANGLE CBD. PLEASE TELL ME WHAT TO DO. I BEG YOU. PLEASE 
Please help
A rectangular picture frame has a perimeter of 58 inches. The height of the frame is 18 inches. What is the width of the frame? Please help show work and help answer thanks 
Precalculus(NEED HELP ASAP PLEASE!!)
cot(theta)= 3 pi < theta < 3pi/2 Find: sin(theta)= 1 ? cos(theta)= 3 ? tan(theta)= 1/3 ? sec(theta)= 1/3 ? csc(theta)= 1 ? That's what I came up with, but they are not correct, PLEASE help me where I went wrong!! 
physics please help
A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period? What is the power of the elevator motor during an upward cruise with ... 
Physics
The potetial energy of a spring is 0.25 J when it is compressed 0.05m to the left of the equilibrium position. At this point it comes to its leftmost position. What is its kinetic energy when it returns to its equilibrium point? a. zero b. 0.25 J and the object is moving to ... 
Physicsplease help!!
A hydrogen atom, when vigorously perturbed, can emit light with a frequency of 6.16·1014 Hz. When the same light from hydrogen atoms in a distant galaxy is observed on earth, the frequency is 5.76·1014 Hz. Calculate the speed at which the galaxy is receding from the earth (... 
College Physics
A gamma ray (a highenergy photon of light) can produce a particle antiparticle pair, each particle with mass 8.68 MeV/c2 when it enters the electric field of a heavy nucleus: γ ! λ+ + λ− . What minimum γray energy is required to accomplish this ... 
Physics
Can someone, please help me out with this question. A uniform rectangular 91.21 kg refrigerator with height h = 2.069 m and width w = 1.153 m is pushed at a constant velocity across a level floor. The refrigerator is pushed in the horizontal direction halfway between the floor... 
physics grade 11
Fretta and her brother deucde to visit some friends near a house.they decide to travel along the road and go 250 m(W),360 m(W40degreesN), and then200 m(N).. we need to find :the resultant displacement. hi please help me with this, so far iv figured it out as a rombus shape, so... 
Physics
Your car is stuck in the mud and two friends are helping you. One is pulling on your car with a force of 370 N at a 40 degree angle and the other is pulling with a force of 450 N at a 30 degree angle. A force of 725 N is required to remove the car. Is the car still stuck? ... 
physics please help!!
1. A 26.0Ω resistor, a 12.0µF capacitor, and a 17.0mH inductor are connected in series with a 150V generator. (a) At what frequency is the current a maximum? 2.A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = ... 
Physics Conservation of Momentum
1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at rest. The speed of the ... 
Physics Conservation of Momentum
1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at rest. The speed of the ... 
math
Hi i have a math exam tomorrow and i wanted to get some extra practice so can you please find me free online math tests. Please do not give me "Proprofs" as one of the websites. I have already tried their website and it did not help :D 
Math PLEASE HELP ME!!
A restaurant offers a 13% discount on chicken wings on Mondays. If Travis eats $7.95 worth of chicken wings on Friday, how much would those wings cost on Monday??? PLEASE SHOW ALL WORK THANKS!!!!! :) 
CHEMISTRY HELP PLEASE!!!
The cell potential of the following electrochemical cell depends on the pH of the solution in the anode halfcell: Pt(s)H2(g,1atm)H+(aq,?M)Cu^2+(aq,1.0M)Cu(s) what is the pH of the solution if Ecell is 375 mV? I first got .65 as my pH, but it said that it was wrong. ... 
Math
Every time Mr. Cold born throws a ball of paper in the garbage can, the probability the ball goes in the cans is 3/4. What is the probability he misses 2 times in a row? Please show all work. Please help I don't understand probability 
physics
An inquisitive physics student and mountain climber climbs a 50.0m high cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.00 m/s. (a) How ... 
college physics
Suppose a 69 kg person stands at the edge of a 7.8 m diameter merrygoround turntable that is mounted on frictionless bearings and has a moment of inertia of 1600 kg*m^2. The turntable is at rest initially, but when the person begins running at a speed of 3.7 m/s (with ... 
Physics. PLEASE HELP!!
A small car of mass 985 kg is parked behind a small truck of mass 1551 kg on a level road. The brakes of both the car and the truck are off so that they are free to roll with negligible friction. A 83 kg woman sitting on the tailgate of the truck shoves the car away by ... 
Re: Physics/Math
Calculate the ratio of the drag force on a passenger jet flying with a speed of 750 km/h at an altitude of 10 km to the drag force on a propdriven transport flying at onefifth the speed and half the altitude of the jet. At 10 km the density of air is 0.38 kg/m3 and at 5.0 km... 
Physics (Please Help)
A map of a burned area obtined from remote sensing contains 120 pixels. The remote sensing image shows that the fire is isolated to 73 of the 120 pixels. a) how many km^2 of forest does the image represent? b) how many km^2 of the forest is burned? c) how many km^2 of forest ... 
Physics
A small cork with an excess charge of +6.0 μC (1 μC = 10^6 C) is placed 0.12 m from another cork, which carries a charge of 4.3 μC. a. What is the magnitude of the electric force between the corks? b. Is this force attractive or repulsive? c. How many excess ... 
Physics
Two cars are traveling along a straight road. Car A maintains a constant speed of 79 km/h and car B maintains a constant speed of 114 km/h. At t = 0, car B is 36 km behind car A. (a) How much farther will car A travel before car B overtakes it? ? km (b) How much ahead of A ... 
Physics
A basketball player drops a 0.60kg basketball vertically so that it is traveling at 6.0 m/s when it reaches the floor. The ball rebounds upward at a speed of 4.7 m/s. Determine the average net force that the floor exerts on the ball if the collision lasts 0.12 s. I calculated... 
Physics
An object initially rotating at an angular speed of 1.6 rad/sec turns through 30 revolutions during the time it experienced an angular acceleration of 0.32 rad/s^2 a) For how much time did the acceleration last? b) What was the final angular speed? Help please. Use the ... 
Physics
An object initially rotating at an angular speed of 1.6 rad/sec turns through 30 revolutions during the time it experienced an angular acceleration of 0.32 rad/s^2 a) For how much time did the acceleration last? b) What was the final angular speed? Help please. Use the ... 
Physics, please help
Copper has a breaking stress of about 3 × 10^8 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.5 mm? Answer in units of N. If 55% of this maximum load is hung from the copper wire, by what percentage of its length will it stretch? Answer in ... 
Physics
Can someone please help me out on this... An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12 V ac is connected to the primary. Find: a. The volts ac available at the secondary. b. Current in the 10 device connected to the secondary. c... 
Physics
a) What will an object weigh on the Moon's surface if it weighs 500 N on Earth's surface? (b) How many Earth radii must this same object be from the center of Earth if it is to weigh the same as it does on the Moon? Alright, I know how to do part a. but I'm having issues on ... 
Physics
A block of weight 41.8 N is hanging from a rope. The tension in the rope is 24.4 N, pulling upward on the block. What is the magnitude and direction of the acceleration of the block? I know the direction would be downwards, since the tension of the rope is less than the weight... 
Physics
A 120.0 volt motor draws a current of 7.60 A when running at normal speed. The resistance of the armature wire is 0.610. (a) Determine the back emf generated by the motor. 115.364 V (b) What is the current at the instant when the motor is just turned on and has not begun to ... 
"Y912f", please givethis note to your pare
"Y912f", please give the follow note to your parents. Dear Parents of Y912f, Your daughter has been receiving help from Jiskha for quite some time. Our task on this site is to "help" students learn, not do their work for them. It has become obvious that "Y" needs additional ... 
Language Arts
Which of the sentences below using direct address is punctuated correctly? (1 point) Please come with me, Sarah, and Tom, to pick Mom’s birthday present. Please come with me, Sarah and Tom to pick Mom’s birthday present. Please come with me, Sarah, and Tom to pick Mom’s ... 
Physics Measurement
Upon what is the precision of a measurement based? It depends upon what is being measured. For volume, the precision depends upon how precisely the buret or graduated cylinder can be read. For mass it depends upon the balance used (triple beam vs analytical balance), its ... 
Physics
A laser used to weld detached retinas emits light with a wavelength of 652 nm in pulses that are 20 ms in duration. THe average power expended during each pulse is .600 W. (a) How much energy is in each pulse, in joules and electron volts? (b) What is the energy of one photon ... 
physics please help:)
A car misses a turn and sinks into a shallow lake to a depth of 8.9 m. If the area of the car door is 0.51 m2, what is the force exerted on the outside of the door by the water? Note: 1 atm = 101.325 kPa. What is the force exerted on the inside of the door by the air, assuming... 
physics
An Aframe made up of two uniform 150N, 3 m long beams pinned at the apex and resting on a frictionless floor. The base of each beam is separated by 3.5 m. A 500 N weight hangs from the apex. A tie rope connecting the two beams is parallel to the floor and is attached to each ... 
physics
An airplane is flying above the Earth's surface at a height of 10.9 km. The centripetal acceleration of the plane is 16.7 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km. Please help, I've tried ... 
Algebradrwls please check!
Posted by Megan on Tuesday, October 12, 2010 at 3:44pm. I have a question if someone could help, please explain it. Given b = 1 and h = 1, what is the equation of the graph if the parent function is y = sqrt (x) Answers: a.y = sqrt(x1) b.y = sqrt (x+1) c.y =  sqrt (x1) ... 
physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by angle 1 = 50° from its original direction, and the struck ball moves off at angle 2 = 29° from the original direction (Fig. 9... 
Physics
There is current of 115 pA when a certain potential is applied across a certain resistor. When that same potential is applied across a resistor made of the identical material but 30 times longer, the current is 0.044 pA. Compare the effective diameters of the two resistors. d2... 
Physics
Mercury is poured into the open end of a Jshaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m and 0.5 m long, ... 
Physics
Mercury is poured into the open end of a Jshaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m and 0.5 m long, ... 
Physics
Mercury is poured into the open end of a Jshaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m and 0.5 m long, ... 
physics
A roller coaster moves 200 ft horizontally and then rises 135 ft at an angle of 30 degrees above the horizontal. Next, it travels 135 ft at an angle of 40 degrees below the horizontal. Find the roller coasters displacement from its starting point to the end of this movement. ... 
Physics
A harpsichord string of length 1.50 m and linear mass density 26.0 mg/m vibrates at a (fundamental) frequency of 460.0 Hz. (a) What is the speed of the transverse string waves? m/s (b) What is the tension? N (c) What are the wavelength and frequency of the sound wave in air ... 
physics
please check my answers and help me with the first one. how can you charge an object negatively with only the help of a positively charged object? This one I am not too sure, when one material is rubbed against another electrons jump readily from one to the other but protons ... 
physics
lake point tower in chicago is the tallest apartment biulding in the united states (although not the tallest biulding in which there are apartments). supose you take the elevator from street level to the roof of the biulding. the elevator moves almost the entire distance at ... 
PhysicsPlease check my answer
If I had the oldfashion camera that had a focal length of 35mm(0.035m) and I take a picture of a person 6 m away, how far does the film need to be from the lens to record a clear image? I know that the equation is 1/f = 1/d(object) + 1/d(image) so would I do the following: 1/... 
physics
As a woman walks, her entire weight is momentarily supported on the heel of one shoe. Calculate the pressure exerted on the floor by a highheel shoe worn by a 50kg woman if the heel has an area of 2.0cm^2. Express the pressure in newtons per square meter and atmospheres. I ... 
Physics
The New England Merchants Bank Building in Boston is 152 high. On windy days it sways with a frequency of 0.12 , and the acceleration of the top of the building can reach 2.5 of the freefall acceleration, enough to cause discomfort for occupants. What is the total distance, ... 
Physics
The New England Merchants Bank Building in Boston is 152 high. On windy days it sways with a frequency of 0.12 , and the acceleration of the top of the building can reach 2.5 of the freefall acceleration, enough to cause discomfort for occupants. What is the total distance, ... 
physics
a cylindrical metal strut that forms part of a landing gear of a jet aircraft has a diameter of 24mm and is 0.35m long.during landing the maximum compressive force reaches a value of 50kn Assuming that the elastic limit of the strut is not exceeded calculate the reduction in ... 
math
find the sum or difference. 1. 5/6 + 4/9 1. 1/2 2. 9/18 3. 1 5/18 4. 1 1/2 I think it is B 2. 15 5/12  11 1/8 1. 4 7/24 2. 4 7/12 3. 4 1/3 4. 4 7/24 I think it is A 3. 5/8  3/10 1. 13/40 2. 1/20 3. 1/4 4. 1/5 I think it is C 4. 15/16  3/4 1. 1 2. 3/4 3. 3/16 4. 9/16 I ... 
Physics please help!!
High speed stroboscopic photographs show that the head of a 188 g golf club is traveling at 52.5 m/s just before it strikes a 45.5g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 44.0 m/s. Find the speed of the golf ball just ... 
physics need help please
There are 7 charges, each with q = 5 nC distributed on a circle with radius R=3cm. The center of the circle is at the origin. The charges are at angles 0o, 45o, 90o, 135o, 180o, 90o, and 45o. (Note: A charge at 135o is missing.) a) What is the net electric field at the ... 
physics need help please
There are 7 charges, each with q = 5 nC distributed on a circle with radius R=3cm. The center of the circle is at the origin. The charges are at angles 0o, 45o, 90o, 135o, 180o, 90o, and 45o. (Note: A charge at 135o is missing.) a) What is the net electric field at the ... 
Physics Elena please help!
Part of a rollercoaster ride involves coasting down an incline and entering a loop 30.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider is equal in magnitude to the rider’s weight...