recorder) to that of a stringed instrument (e.g. Forces of an rolling magnetWhen you roll a cylindrical magnet down an inclined plane, it is deflected to the left or right from its original direction depending on the initial orientation of its poles with respect to the Earth's magnetic field (see diagram below). Year 12 Physics EEI at Moreton Bay College, Brisbane. As part of the investigation they look for errors in methods and try to minimize them. Or you could compare liquids of different density or viscosity; or non-polar (hexane) with polar (ethanol). How does the mass added to an inflated balloon affect the terminal velocity of the falling balloon?

It was a bit messy as it had many overtones present but when I used the "frequency analysis" option it showed the big fundamental and all of the overtones as a histogram. But is this fair? Physicists have derived a formula for this: For either: What is the effect of added mass; why would anyone want to know this - what's the point? Electric strain gaugeA strain gauge is a device used to measure the strain of an object. This way of using “personal interests” as a medium to work through choosing an IA topic

Great idea that still works well. For thickness, you could try aluminium foil (1 sheet, 2 sheets and so on) but you will probably need some thicker pieces. A good EEI would be to see if Newton's Law of Cooling applies with or without a breeze. If you plot T/Ti (y-axis) vs path length L you should get a curve (see below). Of course, you'd need more than one rubber band. What ever you do, don't use mains (240V) voltage.

It can stretch up to 20% of its original length before breaking when it is dry and when it is wet it may stretch up to 50% before breaking. As far as the string goes I suggest going to a guitar shop and get a G-string as it is the thickest (0.016 inch - commonly said to be "16 thou" referring to it's diameter of 16 thousandths of an inch). Jaycar Electronics (Aust.) Click here to see my note about computer CROs further down the page. In one example I saw, at 200 rpm the rate of cooling was 16°C per second, and at 400 rpm it was 25°C/s. The surface tension was measured using a suitable needle and dripping a liquid from it, inspired by Italian physicist Gianino Concetto".

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It is a tradeoff between time and intensity. This EEI would be so much fun. What a fabulous EEI. comprehensive online platform, taking you from the absolute beginning to generating a full IA. If you want to collect data more simply just measure the mass as time passes and estimate the rate (drops/minute) frome the change in mass Δm.

These beeps tell you how high (apogee) the rocket reached; e.g. Moreton Bay College - Year 12 Physics - May 2016.

It has been found that surface tension has an effect so you could make up water solutions with different concentrations of detergents (not too much). Physics teacher at Urangan State High School, Queensland, Australia, Alan Whyborn describes an experiment that could be the basis of an EEI. You could look at how the output differs to the input at different loads.

Secondly, manufacturers and hobbyists dip their spools in melted wax for about 20 minutes to get rid of air bubbles. They were for circuits using the same coil and 100nF capacitor but with different resistors. By dripping water through some old soup cans, several thousand volts magically appear. Doesn't the rate of warming slow down as the difference in temperature gets less? Courtesy of Moreton Bay College.

Each tine of the fork produces a pressure wave which travels outward (at the speed of sound). Using a non-rigid support (called a Barton's pendulum) is much easier to get the oscillations going. Further qualitative discussions about the validity of the law and the accuracy of the measure are then welcome. I was interested that this radio transmission uses the frequencies in an Amateur Radio band. This also goes for any of the online Don’t include two or three related investigations in one lab report. People say that long cables can dull your sound. metre dash, and “Movement Analysis”. Electromagnet cores and magnetic field strengthIn Junior Science you probably made an electromagnet by wrapping wire around a tube and connecting it to the laboratory power supply. Resistance of different types of graphiteCarbon composition resistors are made from a molded carbon powder that has been mixed with a phenolic (or wax) binder to create a uniform resistive body. Turbine efficiencyThis EEI models a device known as a "fluid coupling" similar in many ways to the processes occuring in the automatic gearbox of a car. The key variables are obvious for an EEI and having a data logger would be great. Speed of Sound in a Metal Rod 4 - Transverse Resonance. What would be interesting to find out (and make a good EEI) is to see how the wind speed affects the lifting force of a flat roof. This is difficult to envisage but I think of this way: It takes a certain amount of energy (work) to remove the outer ball in Fig. As the detector is moved across the wall, those fields are affected by what dielectric material is present, resulting ultimately in changes in capacitance. Air resistance and the descent of a balloon - #1 - Constant VelocityInflated party balloons fall slowly to the ground because of their large cross-section for their weight (low density).

The other three forces, however, all directly impact the maximum height the rocket can reach. five beeps followed by two beeps followed by two beeps means that that rocket reached an apogee of 522 ft. Megan Lipsys and Paul Barker measure the characteristics of different nose cones using a TI, Detonating the rocket engine electrically on the oval at Home Hill SHS, The elliptical-nosed rocket reached an apogee of 199.24 m. These are the 16cm long pencils being used. Basketball: The Geometry of Banking a Basket, Measuring Concussion Risk in Football and Other Contact Sports.

When bulk granular materials (like sand) are poured onto a horizontal surface, a conical pile will form. You may also need to work out where to place the pickup along the string and where the string should be plucked (plucked midway may give the fundamental but guitar players tend to play the strings about 1/7 of the way along to get rich overtones - but do you want that complication for a Physics EEI?). This is a great EEI as it has practical uses in industry, domestic appliances, sporting equipment, and in measuring devices; is fairly easy to set up, gives a lot of data for analysis, and can be done at home. It may be tricky keeping the length constant as you will probably use alligator clips. There's a good article on this in The Physics Teacher V50, May 2012 p308 where Patrik Vogt and Jochen Kuhn from the Department of Physics, University of Kaiserslautern, Germany, discuss further investigations. Huygens studied systems of two pendulum clocks mounted on a common base.

Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources. The slope is shown by the "y= 32.178x" which means the horizontal component (B.

Teachers report some lethal trebuchets used to launched huge projectiles in the back yards of suburbia. But what conditions determine the force of the impact. Usually students increase the frequency and note the value at which a stable patterns emerges and take a photo. constant throughout the trial, ensuring that these will not sully the outcome of the trials. The IBO certainly If you plot μ (y-axis) vs wavelength you should get a curve.

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