Wednesday, September 28, 2011

Kim's Projectile Motion Lab

Question: How does velocity effect the impact point of a marble rolling off an incline?

Hypothesis: I think the marble will land about 13 and a half away from the table.

meter stick
2 Vernier Photogates
A Vernier LabQuest mini
a marble
a ruler
a ramp
an incline

The procedure for this lab was simple, roll a marble down a ramp through two recording gates, then either catch the marble before it hit the ground or let it fall and record where it landed. To begin with, after everything had been set up we started the lab. What we had to do was roll the marble down the ramp 9 times, then see is those we almost the same and lucky for us they were. Then we needed to figure out the time of flight for the marble and the horizontal displacement. Lastly we had to roll the marble down the ramp a few times to see if our hypothesis was correct.





Maximum velocity0.704 m/s
Minimum velocity0.611 m/s
Average velocity0.645 m/s
Table Height0.806 m
Predicted impact point0.305 m
Minimum impact point distance0.194 m
Maximum impact point distance0.278 m
Actual impact point distance0.25 m

We found out that our hypothesis was incorrect, close, but still incorrect. We thought the ball would land at about 13 and a half inches, but it landed around 9 meters almost every time. To find out the impact point we used inches then calculated that into meters.

Wednesday, August 31, 2011

My Acceleration Lab

Run 1 Part 1: Running

1. It starts low, but as speed was picked up the acceleration became more intense then it gradually lowered again as the runner slowed down

2. Over time the force becomes more intense, then decreases. It moves in a spiking motion in the middle and on the outside it spikes lower.

3. The both spike at about the same level at the same time.

Run 2 Part 1: Running

1. It starts high in the beginning, but as time went on the lines decreased at moments.

2. Same as the first question, starts high then lowers over time. Mostly switching from high to low, then back to high.

Thursday, August 18, 2011

Women's Brains Bias

1. What is the general point that Gould is presenting?
Gould belives that women are less intelligent do to their brain sizes

2. What is the general evidence on which that conclusion is based?
Size of a man’s head and a woman’s head.

3. What is the gender of all the researchers producing those data and conclusions?
The majority of researchers were male except for one.

4. What weaknesses or problems with those data and their interpretation does Gould point out?
He had pointed out that when Broca measured the difference in weight between male and women brains that even though the he had measured about 100 less women brains than male they weighed only slightly less than the male average.
He did not count in the body heights and weights of the few people he used.

5. a) Name the one woman anthropologist mentioned who studied the subject of this essay. b) What did she find after proper correction of Broca's data? c) What were her conclusions from that finding?
a)The one woman anthropologist who studied the subject of this essay is Marie Montessori.2
b) She supported most of Broca's work and the theory of innate criminality proposed by her compatriot Cesare Lombroso. She measured the circumference of children's heads in her schools and inferred that the best prospects had bigger brains. But she had no use for Broca's conclusions about women.
c)She discussed Manouvrier's work at length and made much of his claim that women, after proper correction of the data, had slightly larger brains than men. Women, she concluded, were intellectually superior, but men had prevailed heretofore by dint of physical force. Since technology has abolished force as an instrument of power, the era of women may soon be
upon us:

6. What conclusion does Gould reach about the central issue?
He concluded that women were less intelligent than men due to brain size.

7. Make a general statement about the role of bias and assumptions in the collecting, processing, and interpretation of data in scientific studies. There has always been tension between genders and they have always been trying to see who is the better advisary, so of course when the reseacher, Broca found out that men had a bigger brain the women he and all the other men started say that women we’ren’t intelligent and all they could every do was cook, clean, and take care of children, but when that theory was proven wrong it shows Broca and all the other men that brain size have nothing to do with intellect.

8. What other kinds of bias can you think of that might influence observations and interpretations in science? Thinking that something will help people and not listening to anyone else’s ideas.

9. Describe your initial feelings (about the subject, the author, etc.) after reading the first 4 pages. Kim- I feel that men were cruel to women, brain size have nothing to do with whether your intelligent or not, a woman could have a small brain and be the smartest person in the world, and a man could have the world’s biggest brain and be the dumbest person in the world. Brain size isn’t the main part of the equation, it’s whether or not you get the chance to learn.

10. Describe your feeling after finishing the entire article. Kim- I feel horrfied that some men didn’t even feel women were human. We’re all the same, so why does it matter whose smarter, if humans didn’t treat everything like a contest maybe we wouldn’t have had all the wars. Just because women are a little better at raising kids than men doesn’t mean that’s the only thing we can do. I mean come on we’re not helpless, as people always say,’Girls can do anything boys can do but in high heels.’