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An Experiment Report on Molecular Diffusion
Introduction The topic under investigation is molecular diffusion. Molecular diffusion is important in biology because, it occurs in living and non-living systems. The reason this subject was studied was to show how some substances pass through the pores of a membrane. This subject study formed a hypothesis. The hypothes...
655 words
3 pages
A Study on the Use of Spectrophotometry
Introduction One of the basic properties of all substances is that they absorb radiant energy. This can be measured with spectrophotometry. This technique is useful because even with objects that appear to be transparent to our eyes will still have a quantifiable absorbance level in either the ultraviolet or infrared regio...
1,324 words
7 pages
A Lab Experiment to Calculate Velocity by Recording the Distance Traveled in the Span of Time
Introduction In class, we are currently studying velocity and position vs. time
graphs. This lab is an introduction to this unit because it gives the
students a physical understanding as to how velocity is calculated by
recording the distance traveled in a span of time. The goal of this lab is
to use the knowledge obt...
494 words
4 pages
A Newton's Second Law Lab on the Impact of Surface Area on the Friction of the Object
Introduction: While doing the Newton’s Second Law lab, my colleagues and I wondered about the impact of surface area on the friction of the object. We looked at a block and started wondering and arguing with each other if surface area affected friction or if surface area did not affect friction; hence this experiment....
629 words
5 pages
An Experiment on Newton's 2nd Law: Force vs. Acceleration to Determine the Relationship Between the Force Applied to an Object and Its Acceleration
Newton’s 2nd Law: Force vs. Acceleration Lab Introduction: Newton’s 2nd law of motion states that an unbalanced force applied to a mass produces acceleration due to the formula. Because of friction, this law seems to contradict common experience. In driving a car, for example, a constant force is required to keep the...
814 words
4 pages
The Basic Principles of Quantum Mechanics
What is Quantum Mechanics? Asking this question reminded me of a confusing idea created by some theoretical physicists from Europe over one hundred years ago. After researching further so that I now understand it to a considerable degree, the idea of it being ridiculously confusing has dissipated from my mind. I now can say...
2,851 words
10 pages
An Analysis of the Relationship between Light Intensity and Closeness of Light Using a Quantum Dot Sensitized Solar Cell
Abstract A quantum dot sensitized solar cell was formed by addition of CdS quantum dots, acting as a sensitizer, onto a ZnO nanowire layer on a conducting indium tin oxide, ITO, coated glass to form a photoanode. The device was completed with an ITO glass counter electrode and an electrolyte solution of Na2S and KCl in wat...
1,644 words
8 pages
An Experiment Observing the Conservation of Momentum in Inelastic Collisions
Objective: The theory we investigated is Conservation of momentum within inelastic collisions. An inelastic collision is a collision that does not conserve Kinetic Energy. Momentum is a combination of kinetic and potential energy. By calculating both values and comparing them, scientists have used them to consistently show...
2,462 words
14 pages
The Bottle Rocket Experiment Using the Principles of Newton's Third Law
For our bottle rocket, we mainly used the help of the internet to find different versions of bottle rockets that we can use. June and I first agreed to include a nose cone to the bottle, because it will help the bottle point to the direction of its launch, helping the bottle to launch at an angle to create speed. Next, we t...
570 words
2 pages
A Lab Experiment: Investigation of the Current-Voltage Relation of a Diode
Abstract We ran a current through diodes at several different voltage levels in order to plot IV curves of the diode and derive the diodes internal resistance and electric potential. We tested a silicon based diode, which we found to have an effective resistance of 1.83±0.05Ω and a threshold voltage of 0.69±0.01V, followed...
1,875 words
28 pages