Planck’s Constant Experiment
IMPLEMENTING
Before I started the experiment, the battery was disconnected with the
circuit because I needed to check that the LED is connected in the
right direction in the circuit. However the apparatus I set up for the
experiment was correct since I followed the diagram and method on the
plan step by step. The circuit worked and there was no accident happen
during the experiment. Before the experiment I prepared a result table
for recording voltages for each different type of LED.
Throughout the experiment I worked carefully by turning off the knob
on the potentiometer every time I had to change the LED or move the
apparatus. Also I left the space around the circuit clear so that I
would not get confused with things that I needed to use and things
that I did not want. The working area was well organised. My
equipments did not get mixed up with others.
Because this experiment does not take long to read out the values of
voltage of each LED, I decided to do 5 repeats for each LED instead of
3 repeats, as I planned.
After I had done all 5 repeats for each LED, I used values of voltage
and current to calculate the resistance. Then I plotted the graph of E
against ƒ to see if there is any anomalous. However I did not have any
anomalous result so I did not need to do any more repeat.
I did not modify my plan procedure since it worked smoothly.
OBSERVING AND RECORDING
Results:
Voltage (V)
Type of LED
1st Repeat
2nd Repeat
3rd Repeat
4th Repeat
5th Repeat
WL27
1.63
1.63
1.62
1.60
1.60
WL28
1.65
1.65
1.63
1.64
1.65
WL29
1.49
1.48
1.48
1.47
1.49
WL30
1.
- The area should be kept dry and taps should be switched off. Variables: I will only be changing the current by moving the variable resistor. I will repeat the experiment twice so that I can be sure of my readings and see if anything has changed or gone wrong. I will take 12 readings at 0.1 amps intervals. Apparatus: o Voltmeter o Ammeter o Variable resistor o 12 volt lamp o Battery pack (set at 12 volts ) o Leads Method: 1.
My results for this beaker are mixed. There is a big difference between beaker 1 and beaker 3. Beaker 3 is 9°C warmer than beaker 1 at 4.5 minutes and has a difference of 6°C at 7 minutes. This would strongly affect my average. As there is such a difference between both of these beakers, I would not repeat them both as they both cant be wrong with such a difference. Therefore I would only repeat beaker 3 because beaker 1's readings are close to beaker 2's readings and beaker 3's reading are separate to both sets of results and has affected the average. By doing this I may affect the total decrease of this experiment which seems to follow a slight pattern between the beakers with insulation layers of 1,2 and 3.
could have messed up my results. I must also make sure that I have the
10. Removed after 10 minutes from the 40oC water bath. Record the color intensity (0-5) of each test tubes in “Color Intensity 10 min” column of table 1. Observations: The contain of each test tube has different pH buffer.
The brightly coloured lights will affect the yeast cells at a faster rate. This is because brightly coloured lights make its strength weaker and darker lights maintain its strength.
(Hart) Stanley Milgram’s experiment in the way people respond to obedience is one of the most important experiments ever administered. The goal of Milgram’s experiment was to find the desire of the participants to shock a learner in a controlled situation. When the volunteer would be ordered to shock the wrong answers of the victims, Milgram was truly judging and studying how people respond to authority. Milgram discovered something both troubling and awe inspiring about the human race. “Since they were first published in 1963, MIlgram’s sensational findings have been offered as an explanation for mass genocide during the Holocaust and events such as the My Lai Massacre in Vietnam and the torture of prisoners in Abu Ghraib prison”(Perry 223-224). The way Milgram was able to control the experiment shows how the human race can crack under pressure and obey orders, no matter the consequence. Although, not everything was as it seems when it came to the results of the findings. As Milgram used actors to portray the “victims” in the experiment, so no one was truly being tortured. Milgram wanted to show that pressure can get to anyone, in any situation.
The Stroop experiment can be traced back as far as the nineteen century around the time of some particular works of Cattell and Wundt. The experiment was first written about in 1929 in German. The experiment was name after John Ridley Stroop after he had written the article “Studies of interference in serial verbal reactions,” which was published in 1935.there have been over 700 replications of this experiment
Repeat step 4 for each color of candy you want to test ( at least three different colors).
5) I will repeat the experiment 2 more times, so I have a total of
I soldered wires to the positive lead on all the LED strips. Then I soldered wires to the negative green on one, the negative red on one, and the negative blue on the last. (Not sure why it was the negative that determined color but it was).
I will use the same light box and power source to keep the experiment controlled