Investigating electromagnetic induction
Investigating electromagnetic induction Aim: * To investigate the factors that cause electromagnetic induction in a coil * To investigate the effect of the number of turns in a solenoid and the order of a magnet bar is inserted (whether it's pushed or pulled out) to the current induced in the electromagnet Hypothesis: Number of turns in solenoid will make the effect to the strength of the current induced and the order which the magnet is pulled out or pushed in will affect the direction of the induced electromagnetic field Variables: Dependent Independent Controlled Current * Number of turns in solenoid * Order of magnet inserted Same magnet Apparatus: Item Quantity Accuracy Styrofoam - Solenoid 4 - Magnet - Ruler ± 1 cm Cable As needed - Ampere meter - Diagram Methods: . Firstly, set up all materials that we need as the diagram shown 2. Then, drop the north end of a bar magnet towards the coils and insert it to the end for 10 times 3. Observe and record the reading on ammeter 4. Repeat it with bringing south pole towards and into the coil for 10 times 5. Change the bar magnets with bigger intensity (600×, 1200×, 3600×) 6. Observe and record data about the changes Results / data collection: Table1. Current induced in 300 turns from 10 cm North South Current ?I ±0.5 mA push in (+) Current I (mA) ?I ±0.5 mA pull out (-)
Analyzing Uniform Circular Motion
Lab Report: Analysing Uniform Circular Motion Name: Adam Purpose In places where the velocity of an object is difficult to find, it is reliable to attain the frequency of an object. This is the most-favourable method used when dealing with circular motion. Frequency, as we know, is indirectly proportional to the period of a motion, or more precisely. We can determine the relationship between a spinning objects mass, the radius of its circular motion (if attached to a thread) and the hanging mass in a circular horizontal motion by applying a formula we already know. The following steps will describe the derivation of a formula which will be beneficial for this experiment; Newton's Second Law states: Fnet = msa However; acceleration of a circular motion is given by; But Thus; Substituting back to Newton's second law, Fnet= ms ( But since there is a hanging mass which is hanging down from the thread; the tension in the thread is equal to the weight of the hanging mass. And the only force applied during the motion is by the tension in the thread, thus T = Fnet and T = mhg; therefore Fnet = mhg. Putting it back in the original formula we get; mhg = ms ( where; mh = the mass of the hanging object ms = the mass of the spinning object r = the length of the radius of the horizontal motion. To measure the relationship between frequency and Isolate for the three
Investigate the factors affecting the period of a double string pendulum
Investigation Question: Investigate the factors affecting the period of a double string pendulum Before commencing my Internal investigation, I decided to research the area of subject of the question over the Internet. Thus I was able to find the definition of a double string pendulum. This will help me in creating my design for a successful experiment. Double string pendulum: metal suspended on each side by two pieces of strings of equal length that are then held by two stand clamps. It functions exactly like normal pendulum with one wave being equal to swing of the metal back and forth from its original position. Period and frequency have the same units, definitions and equations. Except you need only to bring back one side of the metal at certain angle or distance to make the bar oscillate. In this internal assessment for IB Physics I looked at the period and the frequency at which a metal bar oscillates on a double string pendulum. To achieve, this analysis I suspended a metal bar of 17 cm by two strings then held in place by two clamps. I knew from previous knowledge that five specific factors affected the frequency and period at which a metal bar oscillates on a double string pendulum and these the distance between the two strings, the mass of the bar, the amplitude of the oscillations (i.e.: the angle/distance at which the bar will be pulled back) , the center of
Investigate the Size of Craters in Sand Due to Dropped Object.
Name : Mohd Hafiz B.Mohd Partner : Mohd Fhati B.Azait Subject : Physics Teacher : Mrs. Marzini Class : A03A Title: To Investigate the Size of Craters in Sand Due to Dropped Object Abstract: The aim of this experiment is to investigate the size of craters in sand due to dropped object. Our research question is; what is the correlation between the depth of craters in sand due to slotted mass and the height of dropping slotted mass? The size of craters here is represent by the volume of craters itself. We predicted that at the greater height, as the result the depth of the craters will also greater. In other words, when the height of dropping slotted mass is increased in corollary the depth of the craters will increase too. We also predicted that the volume of craters will also increase as the depth of craters increase. Based on the theory, when the potential energy is increased, at the same time kinetic energy will increase too in virtue of its motion. If energy is conserved which indicates that PE is equal to KE and no energy loses to the surroundings. The velocity of the slotted mass dropped at each height and it impulse can be obtained. It leads that the greater impulse of the dropped slotted mass, the larger the depth of the craters and thus the larger its volume. The method that we used in conducting this experiment is based to the research that we done.
Rolling objects down a ramp Physics LAB
Objects Down a Ramp (Physics 3U Summative) Friday December 23rd, 2011 Physics 3U Mr. Meldrum Objective: The purpose of this experiment is to analyze the forces, dynamics and energy of certain objects. Apparatus: Wooden ramp Pencil Case Newton scale Wooden block Digital scale Sandpaper (60 gritt) Timer Meter tape Tape holder Method: Measure the ramp Let go of objects from specified length (90, 75, 50 inches) Time the time it takes from letting go to hitting the wall (repeat 5 -8 times) Repeat until all 3 objects have been timed at all 3 distances Observations: Calculations Pencil Case Pencil case: 400.1g Static friction 1.5 N Kinetic friction: 1.2 N 60 inches: = 0.73 s 75 inches: = 0.93 s 90 inches: = 1.10 s Tape Holder Tape holder: 611.7g Static friction: 3.75 N Kinetic friction 3.5 N 60 inches: = 1.63 s 75 inches: = 1.87 s 90 inches: = 2.24 s Wooden Block (with Sandpaper at the bottom) Wooden block: 293.9g Static friction: 2.3 N Kinetic friction 2.3 N 60 inches: = 1.37 s 75 inches: = 1.67 s 90 inches: = 1.76 s Pencil Case It took approximately 0.93 seconds to
Light Intensity Investigation
Light Intensity Investigation Science Light Intensity Investigation PROBLEM/RESEARCH QUESTION In this investigation, a controlled experiment will be conducted to determine whether the distance between an object and a light source has an effect on the intensity of light and if so, do the illuminance increase or decrease as the distance from the light source increases. Research will be formulated by conducting a controlled experiment in which we will observe the intensity of light received by a light sensor at various distances and evaluate the results gathered to determine the relationship between light intensity and distance. This phenomenon can be experienced when an oncoming car has it head lights switched on, the light intensity seems to increase as the car approaches. Similarly, the rate of photosynthesis also relies heavily on the intensity of light, as the process is seemed to be quicker when the sun’s light intensity is strong. Thus, the relationship between light intensity and distance is important to investigate so that experimental reasoning can be deducted for these phenomena’s. The intensity of the light is the amount of light that falls on a specific object. This measure is called illuminations and is expressed in Lux when the distance is measured in metric terms. A lux equals
Finding the Spring Constant
Practical 2- The application of Hook's law and SHM to calculate K (spring constant) One example of simple harmonic motion is the oscillation of a mass on a spring. The period of oscillation depends on the spring constant of the spring and the mass that is oscillating. The equation for the period, T, where m is the suspended mass, and k is the spring constant is given as We will use this relationship to find the spring constant of the spring and compare it to the spring constant found using Hooke's Law. * Independent variable: Mass (kg) * Dependant variable: Time DATA COLLECTION AND PROCESSING Raw Data Table 1 - Time needed for a spring to complete 10 oscillations Mass, m/grams Time for 10 oscillations (±0.21s) Trial 1 Trial 2 Trial 3 00g ± 4 3.81 3.63 3.74 200g ± 8 5.46 5.30 5.37 300g ± 12 6.75 6.66 6.71 400g ± 16 7.78 7.81 7.78 500g ± 20 8.78 8.72 8.75 600g ± 24 9.69 9.60 9.62 700g ± 28 0.25 0.20 0.22 ////////////////////////////// /////////////////////////////// //////////////////////////////// /////////////////////////////// Qualitative observations As more weights were added to the spring, the spring oscillated more slowly. However, when the mass surpassed 700g, the spring began to get deformed and its length changed therefore it could not be worked with. *The uncertainties for each mass will differ throughout
Movement - modelling the height jumped by horses in the Olympics
Grade 10 Topic One Assessment "Olympic Games" The Problem (AIM): You have studied Unit One: Movement. Using you knowledge of the topic covered select a sport from the Olympic Games and design an investigation into how science affect the performance of an athlete in that sport. REMEMBER you are being assessed on Criterion D/E AND F - Attitudes in Science; safety and behaviour. Horse Jumping Since the time when man has first mounted a horse for transportation, war, or hunting, he has valued this animal's intelligence. Horse jumping is now an event included in the Olympics in which horses combine speed, strength, and agility in an attempt to jump the highest rack as possible. Aim: I plan on investigating how the speed of a ball can affect the height at which it reaches. In horse jumping the horse will have to balance three components - speed, technique and strength to reach the maximum height travelled. The question raised is as follows: What is the relationship between the velocity (m/s) of a ball and the height (cm) at which it reaches? I am going to make a model for the horse jumping horses' in the Olympic Games. I am going to use a ball to model the horse. Hypothesis: I predict that the further the point of release of the ball is, then there will be an increase of the velocity and the maximum height it reaches will also increase. This is because the point at which the
Pendulum Lab
IB HL Chemistry (Surface Area and the Period of a Pendulum) Submitted to: Ms. Fronczak Submitted by: Raphael Hanna Date: February 17, 2009 Course: SCH3UC Design Question: How will varying the surface area of the bob affect the period of a pendulum? Independent and Dependant Variables: The surface area of the bob was varied by melting chocolate into different shaped blocks with the same volume. The resulting effect on the period of the pendulum was measured. The independent variable in the experiment was the surface area of the chocolate blocks and the dependant variable was the period of the pendulum. Controlled Variables: The purpose of this experiment was to determine the effect of surface area on the period of a pendulum. This was does by varying the surface area of several blocks of chocolate and then measuring the period of the pendulum. Several variables however, can alter the results of this experiment. Controlled variables: Pivot point- The type of pivot point could affect how the pendulum swings by increasing the friction and changing the velocity of the pendulum. In this experiment the type of pivot point was kept constant throughout the experiment Length of the string- The length of the string will vary the arc on the pendulum and the period as a result will change. Using a ruler for increased accuracy the string length was kept as consistent as
Incandescent 100 watt light bulb ban: A bright Idea ?
Is it a bright idea to ban 100 watt incandescent light bulbs? Physics Essay John Abarshi IT10 Date :October 29, 2010 Deadline: November 4, 2010 (Cartoon Light bulb) Introduction Since 1 September, 2009 there has been a ban on 100 watt incandescent light bulbs. This means they can no longer be legally manufactured or imported. They are only allowed to sell the stock that is available to them now. To what extent will this ban effect areas of society. This is what I will be discussing and evaluating further in my essay. Incandescent light bulbs are the most widely used light bulbs in the world today. The light bulb was not invented by one person, but it was an idea that kept on getting better developed until Thomas Edison perfected the idea in 1880. Of course the light bulb has seen some little tweaks since its invention, but it is essentially the same light bulb that we use today. The reason for its ban on is that it is largely inefficient (see graph below). The bulbs waste a lot of energy, and some may say that they are outdated in shape and style. There are many alternatives for the incandescent light bulb like; halogen lamps, fluorescent lamps, compact fluorescent lamps (CFL), high-intensity discharge lamps, low-pressure sodium lamps, LED (light emitting diodes) (Kremer). Out of these, only the halogen, fluorescent, CFL and LED lamps are well known. I say this