Rutherford's Gold Foil Experiment

In this experiment, you will have a chance to test the hypothesis that Ernest Rutherford used when determining the size of the nucleus. In his "gold foil experiment," Rutherford shot alpha particles at gold atoms. Once he realized that the alpha particles were hitting a concentrated positive mass, he developed the nuclear model of the atom. Next, he set out to determine the relative size of the nucleus compared to the rest of the atom. He reasoned that the smaller the nucleus, the less likely it was to be hit by an alpha particle. This led to a simple comparative ratio:

3- How would you make it an experimental (rather than correlational) study (it might help to be specific here as well and define the two types of studies in your

A total of 59 participants took part in this experiment. They were split into two independent experimental groups, one being the control group, and the other the experimental group. There were 30 participants in the control group, and 29 participants in the experimental group. The male to female ratio was fairly equal with

To test a hypothesis about a given variable, experimental and control groups are tested in parallel. Which of

A researcher has designed a study to test the effects of different types of individual psycho-therapy on people's levels of anxiety. She has randomly placed people into one of three groups: a behavioral treatment group, a psycho-dynamic treatment group, or a no-treatment control group. She then measures people's level of anxiety after the treatment.

Dependent variable- jar volume after the egg is out (ml). Controlled variables- jar, same amount of water and corn syrup, same number of days it stayed there, same grade egg, same process, same surface we put them on. The experimental group are both the eggs because they both got tested on. We didn't have a control group because we didn't have an egg that didn't go through a test. The experimental group is the group you experiment on. The control group which doesn´t get tested

They were 67 participants in study 1 and they were students from the Princeton University subject pool, there was an equal amount of men and women in the study and 1 unknown. Also, 2 of the participants were excluded from the study, 1 because he was already exposed to the experiment material and the other

The hypothesis is that when trying to remember the word pair list with whatever memory methods used, the beginning and ending word pairs will be remembered most often. The subjects that were chosen came from Indian temple friends and classmates in chemistry class. The target population was eight subjects in three groups, which was a total of twenty-four subjects. There were eight subjects in the control group and eight other subjects each in the two experimental groups. They were divided into control and experimental groups randomly being a mix of temple friends and classmates. A independent variable is manipulated or changed. The independent variable was the word pair list needed to be memorized. The dependent variable is what is being measured in an experiment, which was the results of the word pair test. It was a single blind experiment, which is when only the participant does not know whether they are part of the treatment or control group.

c) What is the null and alternative hypothesis? Do the data results lead you to reject or fail to reject the null hypothesis?

The compiled data was used to form population A of the experiment, while population B was predetermined and provided by the instructor. Research was conducted using primary sources and data collected in order to locate evidence supporting the hypotheses.

formulas, such as percent by mass. Eventually, we were able to determine the empirical formula of the unknown substance.

While consequent to opening the first box the groups was inclined to consider that the capsule is a farce used by someone to simply play games with people's minds, the message it contained played an essential role in making us understand the importance of our discovery. These objects were practically put inside this box with

The scientific question of the project was, Does the size of a tire affect the bike’s speed? The hypothesis was , If the smaller tires were used, then the bike would go faster. The important procedures were: Make sure all equipment is ready. Test the standard wheel of 1 rotation or pedal a second to ride to the finish line. Test smaller and bigger wheels. Record data and have at least 3 trials. Record the data on a piece of paper and compare results to your hypothesis. The Independent variable is the size of the wheel on the bike. The Dependent variable is the standard wheel or tire on the bike. The control group was the bike’s speed and the standard wheel or tire. The Experimental group is the other tires or wheels being tested on the bike. The control variables were the rate of pedaling , the same bike model was used, and the same distance for

Ernest Rutherford was a New Zealand born British physicist who is famously known for “splitting the atom.” His work on the gold foil experiment contributed greatly to the model of the atom and helped develop the standard model of the atom to what we now use today. Without his contributions we would still be using the Plum Pudding model, an out dated and incorrect model, and we would have less of an understanding of how atoms form the world around us.

a. The study was designed as an experimental research by using independent and dependent variables.