10/27/11

Warm up:

What is acceleration?
Acceleration is the change in speed.

What is force?
The momentum  pulling/pushing the object.


What are five examples of forces?


Acceleration= force/mass Neuton's second law

Test

On the histogram below, indicate the mean.

What is the standard Deviation?
The standard deviation is where the graph forms a hump. A large S.D makes the hump wider and shorter. A small S.D makes it tall and skinnier.


What is the difference between accuracy and precision? You may answer this with an example if you wish.
Accuracy= close to target
Precision= same spot every time (or in close range)


Colton drives his motorcycle on Friday to Tok 370 miles away. If he drives 74 mph, how long does it take him?
distance / rate = time
370miles / 74 mph = 5 hours
At the same speed, how far will he travel in four hours?
rate x time = distance
296 miles
On sunday, he drives from Tok to Fairbanks. It's 180 miles and it takes him 1.5 hours. What is the average speed for this trip?
How long is this cockroach?
How long is this stinkbug?
How are your answers for #7 and #8 different in terms of precision? 
Figure 17 is a graph of the position of Billy the beetle as he attempt to steal Susan's bowl of oatmeal. During which time period is he traveling the fastest?
Explain your answer for the last question?
What is the average speed between 1 and 3?
When is he stopped?
Explain your answer for the last question.
When is his velocity "negative"?
Explain your answer for the last question?
What is the average velocity for whole trip?
Explain your answer for the last question.

What is the formula/ definition of average speed?
What is the formula/ definition of average speed?
What is the formula/ definition of average speed!!!!?


Answer: total distance / total time

warm up:

Why are we doing this lab? Because we are told to. To find out how the range of a projectile
Horizontal speed of a projectile is constant
A projectile is an object without wings or an motor flying through the air. The only force acting on it is gravity.
We find the TOF (time of flight) by horizontal speed * time in air = TOF

10 october 2011

Warm up:
What is a normal distribution, a mean, and a standard deviation?
What equation did we develop for falling bodies?
What did we observe about the ball dropped by Rebecca while she was on her skateboard?
If speed is constant, how do we calculate distance travelled in a specific time?

Test on Tuesday STUDY

PROJECTILES

1. sideways speed stays the same!

2 Gravity takes care of the up and down business.

notes on bages 76-80

Acceleration is the change in velocity divided by the time for the change to occur.  Changes in velocity can either a change in how fast something is moving or a change in the direction of movement. Every change in velocity causes the acceleration of the object to change.  If the direction of motion of an object doesn’t change, the size of its average acceleration can be calculated using the following equation:

Calculating Positive Acceleration:

Calculating Negative Acceleration:

Final Outline

Background Report

Al Weber

1) Introduction

A)   My science fair is about living science. To be more specific alternative energies from horse manure.

B)   I will compare the energy created by horse manure to two average local woods to determine if using horse manure, as energy is economically right.

2) History of horse manure

        A) Pioneers used buffalo chips for fires

        B) Horse manure could possibly be used also

3) Known researches of horse manure

     A) Texas A&M

            a) converted manure into gas

                         b) creates 650 million BTU a year

4) How to make into bricks

             A) How to make a brick maker

b) collect piece of plywood or two by fours

                        c) screw together to make a box

                                    d) leave top open and make a lid

                                                e) attach wooden dowel  to top

B) How to compress manure

             a) fill brick maker with wet manure in trash bag

                        b) press lid down hard

                                    c) let brick dry

                                                d) ready to burn

5) Conclusion

    A) Dried manure has been used ever since…

    B) It is being researched to harness…

    C) in order to make it efficient ….

30 september

Home work: page 70-80
take 1 page of notes

Warm up: fill in the blanks:
t(sec)           x(Ft)          v (ft/sc)            a (ft/s/s)
0                   0                  0                      ---
.25                1                  4                      16
.5                  4                  12                    32
.75                9                  20                    32
1.0               16                 28                    32

Ball graph #3

time on bottom and delta v/delta t on the side 

Warm up:

What quantity is the independent axis on the graph that were making? 

Science Fair Bibliography

(Davies, 2004)(Curry, 2007)

(Hooker, 1998)

(State Enegry Conservation office, 2006)

(Texas A&M University, 2011)

(Rueda, 2002)

Bibliography

Curry, C. (2007 йил 4th-November). Ocala. (A. Parsons, Editor, & A. Parsons, Producer) Retrieved 2011 йил 26th-september from www.ocala.com: http://www.ocala.com/article/20071104/NEWS/211040352?p=4&tc=pg

Davies, S. (2004). The Great Horse Manure Crisis of 1894. (F. f. Education, Ed.) The Freeman , 54 (7), 1.

Hooker, R. J. (1998). backwoodshome. Retrieved 2011 йил 26th-september from www.backwoodshome.com: http://www.backwoodshome.com/articles2/hooker87.html

Rueda, G. D. (2002). California State Science Fair. Retrieved september 27, 2011, from www.usc.edu: http://www.usc.edu/CSSF/History/2002/Projects/J0928.pdf

State Enegry Conservation office. (2006). Seco. Retrieved september 27, 2011, from www.seco.cpa.state.tx.us: http://www.seco.cpa.state.tx.us/re_biomass-manure.htm

Texas A&M University. (2011, July 6). Research. Retrieved september 27, 2011, from tammi.edu: http://tammi.tamu.edu/research.html

Ball drop # 1

Ball drop graph number 2

27 september notes

1. get mentor agreement out


2. Acceleration is.....


Answer 2) change in velocity in time
how fast something... how something gets f-f-fast
Gain speed
Is spelled a c c e l e r a t i o n