PHYSICS FINDINGS (Y13 Physics Internal Assessment) by Rowdy Boeyink https://padlet.com/rboeyink/PhysicsFindings Celebrate your research findings by sharing them with your peers. It may even affect your Personal Engagement assessment! en-us 2016-10-06 11:18:15 UTC 2025-10-01 08:21:53 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Send.png To what extent does the length of a electric current-carrying wire affect power dissipation? 142102 https://padlet.com/rboeyink/PhysicsFindings/wish/128780735 By P. Kelly

In conclusion, the length of the wire was proportional to the power dissipated in the wire, and showed a linear correlation when graphed. Furthermore, the temperature of  the wire was shown to significantly affect the wire's RESISTANCE and power dissipation. Thus, the greater the temperature, the worse the conductivity, and so forth.]]> 2016-10-06 12:41:39 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/128780735 How does the density of different liquids affect the refractive index?   130841 https://padlet.com/rboeyink/PhysicsFindings/wish/129026259 By L. Lacombe

The results show a trend when density increases, the refractive index is lower or even equal. It's the optical density that was the main factor and by following this conclusion, the results would make sense if we were to calculate the optical density of all the different liquids.]]> 2016-10-07 06:36:42 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/129026259 How does density of saline water affect the frequency of waves created by a small metal object?  https://padlet.com/rboeyink/PhysicsFindings/wish/129321401 By A. Herry

As the density increases, the frequency of waves increases exponentially. This could possibly be explained as the saline solution has a higher density of particles. This might be explained by the fact that there are less particles per cm3.

]]> 2016-10-09 10:04:58 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/129321401 How does changing the concentrationof soap in water affect the height at which a water stream fragmentises into water droplets?  136913 https://padlet.com/rboeyink/PhysicsFindings/wish/129328564 By T. Hasler

As one increases the concentration of soap in water, the surface tension drops. This decrease in surface tension causes the drops to form at a greater distance from the exit point. ]]> 2016-10-09 12:49:59 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/129328564 How does the depth of water in a large tank affect the speed of the waves produced? 128243 https://padlet.com/rboeyink/PhysicsFindings/wish/129335451 By N. Bin Mubarak Shah

In conclusion, the speed of the first wave seems to decrease in a linear way in relation to the increase of the depth of the water. This goes against the hypothesis of increasing in a linear way. This is likely because of error. However, when depth is = 3cm, the speed of the wave is way below the expected trend line. This may or may not be an outlier. This point has the possibility to not be an anomaly, as it may be the depth where water waves cannot propagate efficiently.  More results are required to deduce this.]]> 2016-10-09 14:48:59 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/129335451 How does the distance between the tip of the ball and its center, affect the drag coefficient of the object? 135029 https://padlet.com/rboeyink/PhysicsFindings/wish/129358062 By N. Faure

If a ball's tip to center distance is increased (in this case an American football ball), the air resistance will be greater. This is due to the decrease in angle of the tip, leading to a higher acceleration as it is more aerodynamic. This means that at the same distance traveled, a ball with a narrower tip will have more air resistance (drag) as it has attained a higher speed, than the one with a smaller center-tip distance.

]]> 2016-10-09 20:19:02 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/129358062 How is the viscosity of Stroop affected by temperature? https://padlet.com/rboeyink/PhysicsFindings/wish/129358780 By N. Stebbins Dahl

The data found in the experiment strongly supports the hypothesis that as the temperature increases the viscosity will decrease. Furthermore, increasing temperature shows diminishing returns in decreasing viscosity, which can be explained using intermolecular forces and field laws. ]]> 2016-10-09 20:27:00 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/129358780 How does the height of water in a crystalglass affect the frequency made when this glass is made to ‘sing’? https://padlet.com/rboeyink/PhysicsFindings/wish/129620202 By R. Sardar

From the graph it can be seen that there is a relatively negative linear relationship between frequency2 and height rather than a linear relationship between frequency and height as I predicted in my hypothesis.]]> 2016-10-10 19:31:46 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/129620202 How does mass affect the speed of a falling parachute? https://padlet.com/rboeyink/PhysicsFindings/wish/130086964 By E. Murphy

There is a strong, positive, linear correlation between mass and speed, however the gradient of the line is not very large (meaning mass doesn't have a very large effect on the speed of the parachute).]]> 2016-10-12 11:45:07 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/130086964 Relation between the tension in the strings of a tennis racket and the energy of a tennisball 1101222 https://padlet.com/rboeyink/PhysicsFindings/wish/130607925 By J. B.

In the hypothesis was predicted that lower tensions in the strings of the tennis racket will result in higher heights reached by the tennis ball, therefore transferring less kinetic energy. This was supported by the collected data as the graph shows a strong linear trend, with a negative gradient, between the tension in the strings and the height reached. There is one outlier which is due to random error.]]> 2016-10-13 21:07:52 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/130607925 How does changing the concentration of Sodium Chloride in Honey affect its viscosity? 139866 https://padlet.com/rboeyink/PhysicsFindings/wish/130986720 By T. Verkade

From the graph we can see that as the Concentration of salt increases the time taken for the ball to drop decreases. This would indicate that by adding salt the kinematic viscosity of the honey is actually lowered and so the ball is able to drop to the bottom of the measuring cylinder more quickly. Logging the time taken for the ball to sink to the bottom, we can see that a linear line is produced which indicates a negative correlation between time taken and concentration.
The salt affects the viscosity of a liquid as can be seen in the formula, increasing the density while having the same absolute viscosity will mean that the kinematic viscosity decreases. The addition of salt causes the density of the liquid to increase. This means that less force is needed to overcome the friction between the two different layers so that the liquid stays in motion.  Therefore the ball will drop through the measuring cylinder at a faster rate.
]]> 2016-10-16 18:09:28 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/130986720 What is the relationship between the concentration of NaCl in water and the time it takes for a ball to drop through it? https://padlet.com/rboeyink/PhysicsFindings/wish/130990162 By ?

My hypothesis, predicting a linear fit for the concentration of NaCl vs time taken for a ball to drop through it, turned out to be correct. The equation I found was y = 0.167x + 1.244 where there is an uncertainty of plus-minus 0.015 s dm^3 mol^-1 in the gradient. When comparing this data to that found online, this relationship certainly makes sense and is of use for the Submarine construction and scuba diving industries.]]> 2016-10-16 18:59:47 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/130990162 How does the changing mass of a non-spinning disc that is attached to a pendulum affects the oscillation period with initial angular displacement of 5°? https://padlet.com/rboeyink/PhysicsFindings/wish/294362579 By S. Li
Prediction: non-linear relationship, oscillation period increases as the mass of the disc increases.
*The disc does not spin when the pendulum is oscillating, and the mass of the rod that connects the disc with the pivot point of rotation is considered. 
Linearised graph (take log on both sides of the average oscillation period and disc mass):]]> 2018-10-18 14:17:14 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/294362579 How does the density of different liquids in a wine glass affect the frequency of the sound the glass produces when hit? https://padlet.com/rboeyink/PhysicsFindings/wish/301931971  BY: Soko
The prediction for this experiment is based on the understanding that a sound is produced when an object vibrates, or oscillates, therefore movement is crucial to the production of a frequency. When the wine glass resonates, it moves in a motion illustrated by Fig 2. With a liquid inside of it, the motion of the wine glass is restricted and it cannot move/oscillate as much (Gardner).This is due to the effects of Newton’s first and third laws of motion. The first law being that a body in motion would stay in motion until affected by an external force, which is for the glass the waves transferred to the fluid. And Newton’s third law being that every action has an equal and opposite reaction, which is in this case be the wave’s of the fluid colliding with the waves of the glass.  
Meaning that with a denser, higher viscosity liquid, the period of the sound wave produced by it would be prolonged, which would lower the frequency.
 
 

 
]]> 2018-11-08 08:23:07 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301931971 How does the current passing through a Locktronics LK5243 diode depend on the forward voltage (0V to 1V)? https://padlet.com/rboeyink/PhysicsFindings/wish/301932033 By . Potemkina
In this experiment, the IV characteristic of a PN junction diode for a range of forward voltage between 0V and 1V. The graph shows an exponential relation between the forward bias voltage and current passing through the diode. We start to see a steep increase in current at around 0.7V, suggesting that the tested diode was most likely a silicone diode.]]> 2018-11-08 08:23:19 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301932033 How does the angle of the bottom of a V-shaped opening affect the rate at which water flows through it? https://padlet.com/rboeyink/PhysicsFindings/wish/301932254 By Simon A. Spaander
In this experiment I tried to find out how the volume flow rate changes as a triangular opening increases in area through an increase in an angle. My prediction was that it would follow a Tan relationship (due to how the equations and trigonometry works out), but found that it was much different.]]> 2018-11-08 08:24:08 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301932254 How does changing the string length in a bifilar pendulum affect its period of oscillation? https://padlet.com/rboeyink/PhysicsFindings/wish/301932465 Nikita Alipov]]> 2018-11-08 08:24:53 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301932465 To what extent can an elastic band emulate the periodic motion of a spring caused by differing masses (50, 100, 150, 200, 250g)? https://padlet.com/rboeyink/PhysicsFindings/wish/301932547 Hyunjin Yang
In conclusion, the oscillation of the elastic band does not precisely emulate the oscillation of the spring for these set of variables. In fact, the relationship is not similar at all, seeing as the oscillation-mass relationship for an elastic band is linear for this set of variables used and the oscillation-mass relationship for a spring is a square root relationship for this set of variables. Therefore it can be concluded that the elastic band does not emulate the oscillatory behaviour of a metallic spring for this set of data. ]]> 2018-11-08 08:25:08 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301932547 How does the mass of a rectangular plate suspended from two strings of equal length and separation distance affect its moment of inertia? https://padlet.com/rboeyink/PhysicsFindings/wish/301932652 By I. Nogueroles 

This experiment involved measuring the period of oscillation of a bifilar pendulum (raw data). The moment of inertia equation was then used to calculate the moment of inertia for the different masses (processed data).

Conclusion: The period of oscillation and moment of inertia increase as the mass of the rectangular plate is increased. 

NOTE: In this investigation, the mass was changed every 50g. However, I strongly recommend using larger intervals (e.g. every 1kg).]]> 2018-11-08 08:25:32 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301932652 How does the inclination of a ramp affect the net force on the car? https://padlet.com/rboeyink/PhysicsFindings/wish/301932755 2018-11-08 08:25:52 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301932755 How does temperature affect the number complete oscillations that a spring undergoing simple harmonic motion experiences during a given (10s) time? https://padlet.com/rboeyink/PhysicsFindings/wish/301933005 By Cristian Garcia

 The hypothesis proposed has been proven to be correct. By observing the general trend in figure 4, it can be seen that when the temperature is increased, the number of oscillations per 10 seconds also increased, processed as average frequency (for example 1.64 average Hz for 21°C and 1.87Hz for 80°C). This data is further supported by the relationship shown on figure 7. The gradient of the line of best fit was 0.0035370.004  0.002, hence a positive value showing a positive relationship.

 Hence, it can be deduced that, as the hypothesis predicted, an increase in the temperature of the spring causes an increase in the k value (due to the increase in metal atom vibrations and thermal expansion) (Markings), hence also increasing the force acting on the spring and also the number of oscillations per given time. Finally, to add a greater validity to the predicted relationship. 


]]> 2018-11-08 08:26:44 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301933005 How does the inclination of a ramp affect the net force on the car? 142627 https://padlet.com/rboeyink/PhysicsFindings/wish/301933182 By Siddhanta Mishra 
This experiment was conducted to find the change in net force applied on to a car depending on the change in the angle. My theory was that the peak net force would be at 90 degrees with the magnitude of 9.81 times mass. 

]]> 2018-11-08 08:27:20 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301933182 How does the launch angle affect the horizontal displacement of a Nerf projectile ? https://padlet.com/rboeyink/PhysicsFindings/wish/301933710 This experiment was conducted to find how the change of angle would change the horizontal displacement of the Nerf projectile. When the perfect angle is hit, the displacement of the projectile should decrease. ]]> 2018-11-08 08:29:17 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301933710 How does temperature affect the magnetic field strength of a solenoid electromagnet? https://padlet.com/rboeyink/PhysicsFindings/wish/301934506  
Thus to answer the research question “How does temperature affect the magnetic field strength of a solenoid electromagnet?” With an increase in temperature there is a decrease in magnetic field strength to be more precise from our data we can concluded that there is a harsh decrease in an electromagnets fields strength with increase of temperature from points 20-40 until all of the magnetic domains of the core are misaligned, then there is a small decrease of magnetic field strength due to the increase in resistance resulting to the decrease of current. If the results are compared to results of an experiment similar to this experiment it mirrors the fact that increase in temperature causing more magnetic domains to misalign. If compared to scientific knowledge on both magnetic domains and current/electromagnets the theory mirrors what is shown in the experiment.Thus concluding that this isa reliable conclusion. 
    
     
]]> 2018-11-08 08:31:57 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/301934506 Investigating the relationship between tension and the fundamental frequency of harp strings https://padlet.com/rboeyink/PhysicsFindings/wish/512610813 Investigation on how the frequency of string when plucked differs depending on the tension placed on the string to explore why tightening or loosening strings on instruments changes their pitch (frequency) and to test the relationship between tension & frequency. 

This was done by attaching different weights (for different tensions) on a harp string and then plucking it to see how frequency changed for different weights on the string.

For the waves unit (unit 4)

]]> 2020-04-17 11:11:12 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/512610813 How does the distance between the load and the support affect the vertical deflection at the load on a cantilever beam? https://padlet.com/rboeyink/PhysicsFindings/wish/944932584 By Oliver Jordan-Anker
Each data point is a larger amount of vertical deflection than the previous data point. Therefore there is a positive relationship and correlation. After examining a linear relationship the following relationship that could be possible is some sort of exponential relationship. 
After examining the line of best fit as a cubic function (rounded) it can be seen that the function passes through four out of six error bars. As it passes through the error bars it shows low statistical error. For the reasons of low statistical error this results in a cubic relationship being more probable. All in all the distance between the load and the support affects the vertical deflection at the load in a cubic relationship where a decrease in the distance between the load and the support results in an increase in deflection.
I can conclude that the relationship can be given by the mathematical model:
V=PL3/3EI
Which shows a cubic relationship where the closer the support clamp is towards the load the more vertical deflection will decrease. 
]]> 2020-11-20 11:59:07 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944932584 Investigating the correlation between the percentage of sugar solution and the rate at which it evaporates (g/s) https://padlet.com/rboeyink/PhysicsFindings/wish/944932894 My hypothesis, that as the concentration of sugar (the solute) in water (the solvent) increases, the rate of evaporation will reduce, is correct. 

This conclusion suggests that when taking into account only a few different sugar concentration solutions, the graph can be drawn as linear (the difference in the R2 values becomes negligible). When viewing the investigation as a whole however, a curved function which reaches a saturation point would be more suitable. 

]]> 2020-11-20 11:59:19 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944932894 How does the volume of glycerol affect the time it takes for the marble to reach the bottom? https://padlet.com/rboeyink/PhysicsFindings/wish/944933146 In conclusion, this lab has a result that proves the hypothesis as the data showed that as the volume of glycerol increases the time it takes for the marble to reach the bottom decreases. Which is the answer to the research question that the greater the volume of glycerol the longer it would take for the marble to reach the bottom. The reason for this is because glycerol produces a greater amount of resistance which means that the force of gravity is balanced faster meaning that the marble reaches its terminal velocity faster than when moving through the air as the forces would be balanced. Meaning the marble wouldn’t be accelerating anymore. Newton's laws of motion would mean that the marble reached a certain velocity and keep that velocity till another force such as the ground would act upon it.]]> 2020-11-20 11:59:29 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944933146 What is the relationship between the magnetic field strength of a homopolar motor ranging from 0.001441 T to 0.008210 T and the rotational speed of a copper wire attached to the motor https://padlet.com/rboeyink/PhysicsFindings/wish/944933274 2020-11-20 11:59:33 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944933274 How does the concentration of sugar solution (0, 10, 20, 30, 40%) affect the specific heat capacity of water (J/kg°C)? https://padlet.com/rboeyink/PhysicsFindings/wish/944933328 In conclusion, it can be said that the concentration of sugar does have an effect on the specific heat capacity of the solution, therefore meaning the initial hypothesis can be accepted. Graph 1 highlights the positive linear relationship between the two components.

]]> 2020-11-20 11:59:35 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944933328 What is the relationship between the magnetic field strength of a homopolar motor ranging from 0.001441 T to 0.008210 T and the rotational speed of a copper wire attached to the motor? https://padlet.com/rboeyink/PhysicsFindings/wish/944933794 By Yigit Dilmen

The aim of this experiment was to investigate the relationship between the magnetic field strength of the homopolar motor and the average rotational speed of the copper wire attached to the motor. The experiment has been successfully conducted and a positive linear relationship between the magnetic field strength of the homopolar motor and the average rotational speed of the copper wire attached to the motor.

]]> 2020-11-20 11:59:52 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944933794 How does the mass of salt dissolved in water affect the buoyant force acting on a body in that water? https://padlet.com/rboeyink/PhysicsFindings/wish/944933856 This experiment aims to investigate the relationship between the salinity of water and the time taken for a bung to sink in this solution. When graphing these two variables against each other the line of best fit shows a positive linear relationship as seen in figure 3. This extensively answers the research question and shows that the more salt added to the water, the more time it takes for the bung to sink, therefore strongly supporting the hypothesis. As explained in the background, the reason for this trend is that the added salt increases the density of the water hence increasing the upward buoyant force acting on the bung. ]]> 2020-11-20 11:59:55 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944933856 To what extent does mass placement affect the duration of rotation of a wheel? https://padlet.com/rboeyink/PhysicsFindings/wish/944933992 In conclusion we can see that as the mass is placed further from the centre of the wheel, the wheel rotates for a longer period of time, there was a noticeable correlation in the data. This is due to the fact that as the mass is placed further outwards, the moment of inertia increases.]]> 2020-11-20 11:59:59 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944933992 How does the pressure of a basketball affect the rebound height after one bounce? https://padlet.com/rboeyink/PhysicsFindings/wish/944934984 To conclude we can see that pressure plays a significant role in the rebound height of a basketball. This is very important in real life as it can help sports organizations understand how important the consistency of pressure of balls is in a game. This is mostly applied in basketball but can also be applied in other sports such as football and tennis.


]]> 2020-11-20 12:00:37 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944934984 In a single-stage gaussian gun, how does the velocity of the first ball bearing affect the exit speed (velocity) of the ball bearing on the end? https://padlet.com/rboeyink/PhysicsFindings/wish/944936679 2020-11-20 12:01:42 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944936679 Investigating the effect of pressure in the ball on bounce height: What is the effect of air pressure in the football on the coefficient of restitution created when bouncing it? https://padlet.com/rboeyink/PhysicsFindings/wish/944937803 By Fares Hosny]]> 2020-11-20 12:02:25 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944937803 How does the mass attached to a double supported beam affect the vertical deflection of the beam? https://padlet.com/rboeyink/PhysicsFindings/wish/944941073 The data was processed  and there was a positive correlation between the mass attached to the Double fixed support beams beam and the vertical deflection of the Double fixed support. There could be certain conclusions that could be looking at the data processed and analysed. 
●      There is a positive linear relationship between the mass attached to the double fixed beam and the vertical deflection of the beam. This relationship has the following gradient: 
              0.019x0.001
●      The data is reliable and doesn’t have high uncertainties and has a high linear correlation of 0.9978
 
]]> 2020-11-20 12:04:24 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944941073 How does the temperature of water (5.0, 15.0, 25.0, 35.0 and 45.0°C) affect its flow rate (cm3s-1) from one container to another? https://padlet.com/rboeyink/PhysicsFindings/wish/944950019 2020-11-20 12:09:53 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944950019 https://padlet.com/rboeyink/PhysicsFindings/wish/944950396 2020-11-20 12:10:07 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944950396 How does mass of an object affect energy loss when two objects collide 1493551 https://padlet.com/rboeyink/PhysicsFindings/wish/944951782 By Hongyang Jiang.

]]> 2020-11-20 12:10:49 UTC https://padlet.com/rboeyink/PhysicsFindings/wish/944951782