Grade 11 Definition and 124 Threads

Hi Guys, I am currently in grade 11 (just finished my last exam yesterday :-), who lives in Toronto. I would like to pursue toward an Engineering program. I have some questions: 1- I am not sure which school to go (Waterloo or Toronto). 2- Considering I live in TO, does it worth to go to...

A 175 kg case must be loaded onto a truck that is 1.5m above the ground. calculate work done AND An archer exerts a force of 100N as she draws the arrow back 0.60m. what is the potential energy of the system before the string is released? iam completely lost on these 2 questions we did this...

Grade 11 musical instrument project need help! Homework Statement I am making chime bars for my project. My partner and I were working on it today and we cut our first chime bar and used visual analyzer to figure out the frequency of sound produced by hitting our first chime bar. We found...

Homework Statement Emanual Zacchini was shot over three ferris wheels, landing in a net at the same height from which he was shot. Given his initial velocity of 27m/s [53degrees U of R] and range of 69m, find a) his maximum height reached b) the time spent in air, using two different...

Does anyone have any good websites with practice problems and great in-depth explanations on thermal energy/heat transfer at the introductory level (grade 11)? I've searched many websites only to find questions that are too advanced. Questions like: What mass of steam is produced when 2.4 X 10^6...

Homework Statement the mother graph is y = 2 ^ x Homework Equations y=2 ^ x The Attempt at a Solution so i know the graph is flipped upsidedown and the whole graph is moved up 6 spots so i can get y = -2 ^ x + 6 however the solutuion is y =-2 ^2x +6. i can't seem to figure...

Homework Statement In a long distance race, Michael is running at 3.8 m/s and is 75 m behind Robert, who is running at a constant velocity of 4.2 m/s. If Michael accelerates at 0.15 m/s^2, how long will it take him to catch RobertHomework Equations D=vi(delta)t + 1/2a(delta)t^2 etcThe Attempt...

Homework Statement A toboggan with a mass of 15kg is being pulled with an applied force of 45 N at an angle of 40degrees to the horizontal. What is the acclecration if the force of friction opposing the motion is 28 N?Homework Equations Is this question related to the x and y component rules...

Homework Statement a) Cathy takes the bus home from work. In her hand she holds a 2.0kg cake box, tied together with a string. As she ascends the steps into the bus, the box accelerates upward at a rate of 2.5 m/s^2. What is the force exerted on the string? Homework Equations F=ma...

Homework Statement Ok, well I have a Grade 11 Physics question regarding Projectile Motion Calculations. The question is: A bullet is shot horizontally from a gun. If the bullet's speed exiting the muzzle is 325 m/s and the height of the gun above the ground is 2.0m, a) how long was the...

A subway train starts from rest at a station and accelerates at the rate of 2.0m/s^2 for 10s. It runs at a constant speed for 30s, and then decelerates at 2.4m/s^2 until it stops at the next station. Find the total distance between the stations and the average speed of the train.

Homework Statement Ok, so i have a test on Kinematics Grade 11 coming up on monday and i want some practise on Challenging Word Problems. Can anyone give me some problems to prepare for mondays test and help me through the process like which formula i use and stuff. Homework Equations...

Homework Statement f(x) : ax²+bx+c, a≠ 0 [have to find the a(x-h)²+k form first] Find an expression in terms of a, b, c for: (without using graph or calculator) (i) An equation of the axis of symmetry (ii) The maximum or minimum value (iii) The coordinated of the vertex (iv) The...

Homework Statement A gaseous hydrocarbon weighing 0.185g occupies a volume of 110.cm^3 at 26 celsius and 743mmHg. what is the molecular weight of this compound? Homework Equations PV=nRT The Attempt at a Solution i have no idea where to start ;(

Homework Statement The top of a hill is height h, m above the ground. If there is a friction patch on the flat ground only and no friction on the hill, what will the speed of a box of mass m at the bottom of the hill? How long must the friction patch be to make the box's speed 1/3 of what it...

1. The energy from elastic potential is 1/2 kx^2. K is a spring constant and x is the displacement distance of the spring from its equilibrium position. How far will a spring of spring constant k=25 N/m compress if an obejct of mass 4 kg has an initial velocity of 20 m/s runs into the spring...

Homework Statement Jack went up a hill to fetch water. Jack fell down and rolled down the hill accelerating at 0.65 m/s^2 down. If he rolled 11m down the hill in 3.7s, with what velocity was he moving when he fell? Homework Equations a = v2 - v1/t v2 = at + v1 The Attempt at a...

PARTS C AND D ARE WHAT I'M HAVING TROUBLE WITH. a tobaggan of mass 20kg is dragged horizontally across snow by someone who exerts a force of 45N. the tobaggan travels 8m under the action of the force and has a final speed of 2.6 m/s. a)calculate the actual kinetic energy of the tobaggan...

Homework Statement A parachutist experiences an air friction force of 150 N and an acceleration of 7.9 m/s^2. What is the combined weight of the parachutist and the parachute? Homework Equations None. The Attempt at a Solution a= (Fg-Ff)/(m) 7.9 = (mg-Ff)/(m) 7.9 =...

pete and john play a game of tug f war on a frictionless icy curface. pete weighs 539 N and john weights 392 N. during the course of the game, john accelerates toward pete at a rate of 3 m/s^2 a)what's the magnitude of the force that peter exerts on john? b)what's the magnitude of pete's...

sue drives her 1452 kg car along a straight road at a constant velocity of 30 m/s [E]. Ger brakes suddently give out. she puts the car in neutral and let's it coast for 25 seconds. The air drag decelerates the car to a velocityof 25 m/s [E]. assume a frictionless surface. PART C IS WHERE IM...

light travels from ethanol intro crown glass. what's the brewster angle in this situation? illustrate your answer with a light ray diagram. what's the signifcance of this angle of incidence? n1=1.36for ethanol nR=1.52 for crown glass tanangleB=nR/ni =1.52/1.36 =1.12 (48.2 degrees)...

Homework Statement there's a picture of the question... from my textbook http://photos-h.ak.fbcdn.net/hphotos..._1385551_n.jpg thers a diagram image of the problem too to help understand Homework Equations well its a word problem, i used cosine rule at beginining and then...

could someone please try and solve this? and explanation would be greatly appreciated too ! this was one of the homework questions, but i didnt really understand. the teacher explained it again to the class partly, but didnt understand a part of it so we didnt continue... maybe one of you guys...

Homework Statement a candle is placed 36cm from a screen. where between the candle and the screen should a converging lens with a focal length of 8.0cm be placed to produce a sharp image on the screen? Homework Equations 1/focal length = 1/distance of object from lens + 1/distance of...

Homework Statement The drag coefficient works like the coefficient of friction when an object is moving through the air, but it increases its effects as the object moves faster. A skydiver plus the parachute has a combined mass of 94.0kg. if the formula for the drag coefficient of the...

Questions; 1)A person in a hot air balloon at 500m is rising at 20m/s. In order to rise up even faster, she drops her physics textbook out of the balloon. How long will the book take to hit the ground? Since it's thrown at 500m high, and Gravity is -9.8m/s 500/9.8 = 51 seconds However I'm not...

Homework Statement A car is traveling along a highway with a speed of 25m/s when the driver sees an obstruction 180m directly ahead. It takes the driver 0.80s to react and begin breaking. A) How long will it take the car to stop once brakes are applies, provided the car stops just before...

Homework Statement A train is 120m long. Gaurav was standing 200m from the front of the train when it began to accelerate uniformly from rest. He noticed that the front of the train was moving at 8.00m/s when it passed him. How fast would the back of the train be going when it passed Gaurav...

Stopping Distance Grade 11 Physics Help Needed -- URGENT! Yatin was driving at 90.0km/h when he saw the light turn yellow at an intersection located 75.0m ahead. Yatin used 0.400s to make up his mind, and then braked at 5.00m/s2 until he stopped. What was his stopping distance? Did Yatin make...

Hey, guys just joined PF, was hoping you could help with this questions and in turn maybe i can return the favour (with the little physics knowledge I have). Homework Statement In a acceleration test, 2 markers are placed 0.30 km apart. The first car passed the first marked with a velocity...

Hi guys, please help me out on this question, I am doing a Position x Time Graph Lab (displacement vs time). and For the analyzing and interpreting questions, i have this question I am stuck on ... 2. For constant acceleration, how does the average velocity for an interval compare with...

Having trouble with this question. Usually i'd have to see examples first and rep it out but time ran out of class and i guess we couldn't see them. He gaves us tons of notes though but I'm not really sure if I'm doing it right. Homework Statement for g(t) = 3t-2, determine each of the...

Hey guys need help beginning to solve the following: A skydiver accidentally drops a camera out of the plane. The diver notices the mistake 3.0s later and dives out of the plane with a downward velocity of 10.0 m/s. The camera experiences free fall(9.8 m/s^2), but the sky diver accelerates...

Hi I have two questions grade 11 chem questions that I don't know how to do. HELP PLEASE! Q1: Tetraethyl( Pb(C2H5)4 ) lead was added to gasoline up to 2.0ml per 3.8L of gasoline. a)Calculate the mass of Tetraethyl lead in the total amount of gasoline that you use for this trip (31.2 L of...

Suppose a spring is attached vertically to the ceiling of an elevator. When a 5.00Kg mass is attached to the spring, it descends a distance of 25.5 cm. a) what is the spring constant of the spring? I found out that it was 192 N/m, so my problem is with part B! b) how far would the spring...

i really need someone to me verify my answer. i will be having my exam next week and iam stuck . please iam really stuck on some of this question. ' is not '' its not, not 1. F = B.(A''. B' . C') 2. F = A. (A''+ B' + C') 3. F = A . (B''.C') + A . (B + C') 4. F = (A'' +...

University Prof with PhD in Physics and/or Math paid less than housekeeping director in the hospital in Toronto, soooooooo sad. http://www.fin.gov.on.ca/english/publications/salarydisclosure/2008/univer08.html

Hey guys, I'm back, finished my term in physics with a 96% final grade, thanks to all you guys. So i thought id try you guys before i went to find a chemistry help forum. I get the Mole Concept, kinda, here's an example question (i got an answer, not sure if its right, we don't get a "back...

Hi! I'm an A Level student studying under the British Edexcel specification (8540). I'm struggling with physics. My teachers at school are uncooperative and boring; it's only been a month and without reviewing basics they're already taking tests. I don't remember much from my GCSEs and my books...

GRADE 11 physics PLEASE HELP ! =] A student is late for school. She runs out the door and starts down the street at 8.0 km/h. Three minutes later, her mom notices that she left a book she runs after her daughter at 12.0 km/h a, how far did she get in three minutes? b, how long did it...

[SOLVED] Simple Grade 11 Question ! Help Please A sample of natural gas occupies a volume of 350 L at 20.0 C. The pressure remains unchanged, and the temperature is increased until the volume of the natural gas becomes 385 L. WHAT IS THE FINAL TEMPERATURE (in C) of the gas ? easy...

A current of 4.80 A leaves a battery and separates into three currents running through three parallel loads. The current to the first load is 2.50 A, the current to the second load is 1.80 A, and the resistance of the third load is 108 [resistance sign here ] . calculate (a) the equivalent...

Homework Statement A Rocket Sled weighing 20000N is gliding at 24 m/s (North) on ice where friction is negligible. Suddenly it passes over a rough patch 22m long, which creates a friction force of 6000N (south). With what velocity does the sled leave the rough patch? Homework Equations...

****A Grade 11 Waves --- Frequency-Movement Problem**** [SIZE="3"]A 20g mass is picked up and moved from its rest position 20 cm. The mass has a frequency of 2.0 Hz. How far does it move in 10s. (Show work) I have no idea how to solve this. But if it helps I have learned these equations...

Homework Statement A skier is going 8.2m/s when she falls and starts sliding down the ski run. After 3.0s, her velocity has changed to 3.1m/s. How many seconds after she originally fell did she finally come to a stop? (Assume constant acceleration) Homework Equations Δd = 1(v1+v2)Δt...

Hi, and thank you for your time to read this. I'm having a difficult time figuring out the answer to this question; Q: A porpoise swims toward a school of fish and emits a high pitched sound. The porpoise listens for the echo of its own squeak. I have to predict whether the observer will...

Hello everyone, I am in Grade 11 and since the past week was the first week of school, my physics teacher did a few demos to start the new year. He did one "magical" demo and he said that we would find out later the physics behind it. I was wondering if anyone could offer some insight as to...

Homework Statement If you threw something vertically upward from the moon's surface where g=1.6N/kg [down], how many times higher would it reach compared to throwing it from the surface of the Earth with the same force? Neglect the effect of air resistance on the Earth. Homework...

Hey , i am in grade 11 not yet studied gamma function, and not sure if it will be in the program but i have studied it a bit on my own f(x) = gamma(x) x = 1 : y = 1 x = 2 : y = 1 x = 3 : y = 2 x = 4 : y = 6 x = 5 : y = 24 x = 6 : y = 120 and i found a pattern : 1 * 1 = 1 2 * 1 = 2 3 * 2 = 6...