Investigating the Rate of Reaction Between Marble Chips and the Varying Concentrations of Hydrochloric Acid Planning Before starting the experiment I had to work out how much marble chips would be needed and how much HCl would be needed. I decided that 20 grams of marble chips would be needed and I measured this on a pan balance. The chips would have to be of medium size as from a previous experiment done in class I realize that changing the surface area of the marble chips would change the rate of reaction. I then used 100 cm3 of HCl and this would be the only variable that I will change. I decided to use the concentrations of 0.5M, 1.0M, 1.5M and 2.0M (1mole/dm).
I then left each test for 20 minutes, but found after that time a slight reaction had taken place - the potato chips only increased or decreased by a very short amount. I then predicted that now I would have to leave the tests for a longer amount of time and use longer potato chips to ensure that there is enough of a reaction to compare
You can, however, lose total body fat, which will also take inches off your middle. To accomplish this, a sensible diet and regular exercise routine should become part of your lifestyle. (See References 2) Step 1 Engage in moderate cardiovascular exercise on most days of the week to burn calories. The American Council on Exercise recommends gradually working your way up to one hour of cardio on most days. (See References 2) They suggest breaking up your workout into 10-minute sessions over the day.
People at very high risk for diabetes reduced their risk with lifestyle intervention. The goal is to try to lose 7% of initial weight and increase activity levels to 150 min more per week than current physical activity. This study showed that the risk of diabetes could be decrease with this lifestyle intervention by 58%. They could change their environmental factors from genetic factors taking the weight and the activity out of the equation. Also, a 10-20 pounds loss is enough to improve diabetes.
(See Reference 1) Calorie-Blasting Cardiovascular Exercise Cardiovascular exercise makes you breathe harder and increases your body temperature, resulting in caloric burn. To lose weight, the U.S. department of Health and Human Services recommends doing at least 150 minutes of moderate cardio a week, and if needed, slowly working your way up to 300 minutes of cardio. (See References 2) In 30 minutes, a 150-pound person can burn 335 calories by pedaling on an elliptical machine; 223 calories on a stair climber; and 372 calories by running at a speed of 6 mph, playing racquetball, or by jumping rope. (See References 3) Muscle-Stimulating Strength Training A full-...
This was intended to emulate cognitive load; fast speed was high cognitive load, and slow speed was low cognitive load. After the 20 seconds, participants were asked to state their answer; how frequently the target digit appeared in the trail. Two second later, another trial for digit series was presented. Then randomly between 50 to 75% of series trials, the trait test was presented replacing the target digit task for 500ms interval. The series digit task then continued simultaneously with the
Starting fires, turning on the radiator, opening windows, etc). We will change the width of the paper for each experiment by simply cutting off 1cm horizontally for each experiment, so it will go 4cm, 3cm, etc. We will do this accurately and carefully with a ruler and scissors, to ensure accuracy, Prediction I predict that as the width decreases, the resistance will increase, and as the width increases, the resistance will decrease. I predict this because if the paper has a large width, there will be more room for the current to flow through, and so the resistance will be less, whereas if the paper is thinner, there will be less room, and the resistance will increase. I also predict ... ... middle of paper ... ...ted to be really accurate) doing each width 5 times, and we also could have done more widths, perhaps doing an experiment every 1/2cm instead of whole cm.
Experiment 1 I will investigate the relationship between the length of the string, and the time it takes for the pendulum to make 1 full swing. Ã˜ Hypothesis: As the length of the string increases, so does the time. Ã˜ Procedure: We will test how long it takes for a 80g weight attached to a string to swing from one point and back to the same point. We will use various lengths of string to test the times of the swing. However, I will measure the time taken for 10 oscillations rather that 1 and then divide the result by 10, in order to eliminate as much time and reaction error as possible.
The authors used the mean as the central tendency which seems appropriate because logically people who weigh different amounts are going to lose weight proportionally. There is also a level of thoroughness that is evident by preforming the statistical analysis at multiple intervals. Had the authors only compared baseline to 12 months they could have missed a trend such as the change in total cholesterol. There was a decrease in total cholesterol at 3 and 6 months but by 12 months it was almost similar to baseline. h. Evaluate the discussion of results and the conclusions of the study.
According to the simulation, I could have managed my popularity better since my fiscal policies consequentially caused the popularity score to drop from 3.68 in the first simulation to 3.45 in the second. The second scenario asks, "Which components of fiscal policy will you use to fight recession?" In answer to the posed question, I increased the federal spending for education by $200 million and decreased the income tax rate by 0.