Grade 12 Definition and 141 Threads

Homework Statement A rock is shot straight up from a slingshot with an initial speed of 30 m/s. When it's exactly halfway to the top of its flight, a second rock is shot straight up from the same spot. The second rock reaches the first rock just as the first rock reaches its apex (highest...

Homework Statement Hi everyone, This is the first time I have posted here so please be nice! I am looking for a topic for my year 12 physics EEI (extended experimental investigation), where we have to chose ANYTHING, test it (quantative data needed), generate rules (potentially linking the...

Question: A bomb explodes and 3 pieces are flying in different directions. Piece 1 : weighs 2kg and is traveling at the North East direction Piece 2 : weighs 1kg and is traveling in the south direction ( exactly downards ) Piece 3 : weighs 3 kg and is traveling in the west direction (...

Anyone Taking Grade 12 Physics Through Ilc Or Has Taken In Past??help Needed Anyone taking grade 12 physics through ilc?. Need help understanding keyquestions that i got wrong. My exam is coming up.:(...

Well... I am in grade 12 Physics and we were asked to make a Slingshot to fit within a 1 meter cube. If anyone has any ideas or know any websites with plans to making one.. it will be very helpful Thank you.

Homework Statement an oil stick 122 nm thick (n=1.40), lying on water, is illuminated by white light incident perpendicular to it's surface. What is the wavelength of the color that appears? Homework Equations I'm not sure, but i tried n= Lambda(air)/Lambda coating in order to find the...

Homework Statement 1. When a meteoroid collides with the moon, surface material at the impact site melts. Explain Why? 2. A falling rock gains momentum as its speed increases. Does this observation contradict the law of conservation of momentum? Explain your answer. The Attempt at a...

Homework Statement A pulley device is used to hurl projectiles from a ramp (uk=0.26) as illustrated in the diagram. The 5.0-kg mass is accelerated from rest at the bottom of the 4.0 m long ramp by a falling 20.0-kg mass suspended over a frictionless pulley. Just as the 5.0-kg mass reaches the...

Hi.. I am a keen student in physics 12 under the bc corric.. right now were doing static equillibrium.. and I am looking for sites, texts etc.. with loads of sample problems that can help me nail this unit and upcoming ones as well.. any help would be great thanks

I was looking for some good pages on Projectile Motion with challanging problems. I'm in grade 12 and I figure the questions in the book are not too challanging (not that I would get 100% on every test but by doing harder questions you understand it more conceptually). I'm looking for some...

Homework Statement Alright, just started physics and I've already fallen behind :( trying to do my homeowkr and I am completely lost, no idea at all. So here's a question which i had no idea how to do. * A tree house has a vertical "fire pole" of smooth metal, designed for quick...

ILC chemistry course grade 12... anyone taking it?? I'm on Unit 2 and i need help with some experiments...anyone here taking that course?help would be appreciated... thnx:redface:

pool balls grade 12 please help issue resolved tyvm to Trajan22

okay so here's the question...can anyone figure it out... the question is... Sound with a frequency of 442 Hz. travels through steel. A wavelength of 11.66 m is measured. Find the speed of the sound in steel. Please help...i really need some direction

please help me with this quest i cannot figure it out (please show your work thanks!) sry i made a mistake this is not algebra. it is sloving complex fractions Determine a polynomial or rational algebraic expression in simple form equivalent to each of the following: C3 1+(a+a^-1)^-1...

Chemistry question: Grade 12 stuff (Heat energy) So we're going to have a lab soon, and its goal is to find the heat energy value (Q). We're going to take a beaker filled with water, record its mass and initial temprature, and then bring a really hot iron washer inside and record its final...

Hey there. Right now, I am doing a project for my grade 12 Geometry and Discrete class on any topic of our choosing. I have chosen the subject of RANDOM WALKS, and I am looking for any information on this subject at all, as I seemed to have hit a plateau of information, where all of my new...

This project is for a grade 12 chemistry course. We're a group of three. We basically have not the slightest clue on what to do our project on... This cummulative performance task will include an extensive literature search and hands-on design. The work should be based on one of the following...

Chemistry Grade 12 Help|URGENT Hi, I need some help with this question. 1)Phosphorus forms PCl3 and PCl5. Nitrogen forms NCl3 but not NCl5. Explain the reason why NCl5 doesn't form? I know Phosphorus & Nitrogen are an exceptional to the octet rule but I don't know why NCl5 doesn't form...

A block weighing 80N rests on a plane inclined at 20 degrees to the horizontal. The coefficient of static friction is 0.25, while the coefficient of kinetic friction is 0.15. a) What is the minimum force F, parallel to the plane that will prevent the block from slipping down the plane? b)...

Body B weighs 440 N and body A weighs 140N. The coefficients of friction between B and the incline are Us = 0.56 and Uk = 0.25. a) Find the acceleration of the system if B is initially at rest b) Find the acceleration of the system if B is moving up the incline c) Find the acceleration of...

Two planes fly from Toronto to Philadelphia (To. - Philly). Plane A flies via Pittsburgh whereas passengers on plane B have a direct flight. Pitts. is 350km due south of To. and 390km due West of Philly. The airspeed of both planes is 400km/h and a steady wind is blowing from the east at...

I'm in a pickle with this question. Turning to anyone who can help me please. A pedestrian is running at his maximum speed of 6.0 m/s trying to catch a bus that is stopped at a traffic light. When he is 16 m. from the bus, the light changes and the bus pulls away from the pedestrian with an...

I"m in grade 12 now, and I'll be going to university next year. I got accepted to Engineering, but now I'm not sure if that's what I really want to do. I love theoretical physics, and I don't mind majoring in that, except I'm not sure what are some career options. I don't like lecturing...

Was just wondering if there was a "shorter" method of solving this problem. nPr = 60. nPr = n!/(n-r)! n=? r=3 Works out to be n(n-1)(n-2) = 60. From here on, what different options do I have? I have several ways of solving it, but was wondering what would be the "easiest"...

5. A particle with a charge of -4.00 × 10-6 C moves through a uniform electric field of 70.0 N/C directed downwards. It is moving horizontally at 12.0 cm/s exactly between two plates that are 10.0 cm apart. The particle has a mass of 0.0400 g. a. What is the net force on the particle? b...

I have two questions that I need answers for: 1. A small truck and a large truck have the same kinetic energies. Which truck has the greater momentum? Justify your answer. 2. (a) Can an object have kinetic energy, but no momentum? Can an object have momentum, but no kinetic energy...

I'm a grade 12 student and have been given the task of teaching our algebra and geometry class for a day :smile: . There are absolutely no restrictions on what I can teach about. It does not in any way have to be related to algebra or geometry, just mathematics in general. What I really need is...

Help with grade 12 Trignometry project!a.s.a.p pleasezz Hiii,, I am a grade 12 student ,and i have a math project related to sinosoidal functions to complete...My only problem at the moment is that ,with the notes my teacher gave to us it says that the sinosoidal regression on our calculators...

For both questions i have to find dy/dx 1. y=x^5e^-3x I got (5x^4 e^-3x) + (x^5 (-3xe^-3x-1)) some how that doesn't look right to me. not too sure... 2. 1-e^-x y= -------- 1+e^2x My answer was: (e^-x) - (1-e^-x) (2xe^2x-1)...

A wire, whose linear mass density is 150g/m, carries a current of 40A (supplied by a flexible negligible weight). This wire lies parallel to, and on top of, another horizontal wire on a table. What current must flow through the bottom wire in order to repel and support the top wire at a height...

Grade 12 physics problems :( One question: Because of absorption, a Polaroid will actually transmit 40% of nonpolarized light incident on it. Two such Polaroids with their axes aligned will transmit a. 16%. b. 24%. c. 30%. d. 32%. e. 40%. The answer is 32% and I have no cue...

Incredibly hard Physics homework! Alright, so here's the problem: Three known masses are connected together by four pieces of ideal string of known length. Determine the tensions in the strings and the unknown angles, given any value for the length of the strings and the weights...

I am in grade 12 physics, and i have to practice equation proofs. I am currently studying work, kinetic energy, springs, and potential energy (gravity and elastic). Does anyone have a good proof?

Bonus Question... So my teacher gave us this question... where he describes that. "We have a heavy box, we want to move it but can NOT apply horizantal force (meaning CANT get on your knees and push it) we would have to either push down on it at an angle to move it, or pull up and push (or pull...

Please help, I cannot figure this problem out and I would appreciate any assistance. Sorry if this seems ridiculously easy to some of you. I have an idea of what might happen, but I'm really not sure at all. The problem is in the following image: http://img15.exs.cx/img15/9651/mathhelp.jpg...

at future shop the TI83+ just went on sale for $97 CND. I think i am going to get it. This year I am in grade 12 and am taking algebra/geometry and data management which i believe is the equvialent of finite. Will this calc. be adequate for those cources? or should I bump up to the 86 or 89? I...

I will be going into grade 12 soon and the two math courses that I will be taking are 1) Advanced Functions & Intro Calculas 2) Geom & Discrete Math I have no idea what either one will be like. So is there any info where I can read up about these maths to get more a little more ready for...

Hi, I'm a grade 12 high school student who is planning on a post-secondary education in a Math or Science field (after another year of high school). I'm not exactly great at the stuff, I just don't want a job where I have to deal with too many people all day. :P I'm a decent student, my grades...

Hi guys, I need some help with part C of the question. I've already done the other 2 parts and shall post my solution to parts a and b soon. But in the meantime if any1 can get me started with c... Car A traveling at 100km/hr begins to accelerate in order to pass another car traveling at...

HELP! I am in grade 12 physics and my teacher gave us a puzzler for the weekend. I need serious help with it and all of my classmates can't figure it out either! The question is : A 10.8 kg box is 5.0 m from the edge of a 12.96 m high cliff. Bob pushes the box over the edge of the cliff by...