Tallest Tower?

According to my research, Burj Khalifa is the tallest man-made tower in the world with a height of 828 m!!!

However, I did not know that till I researched it up. The first thing that came to mind when "tallest tower" was mentioned was the CN Tower.

Although it isn't the tallest structure, the structural concept is somewhat similar. The base is obviously the largest, holding up and supporting the whole weight of the building, while the top is extremely thin and small. As we learned recently, the centre of gravity is what supports the weight. Though in different objects, the centre of gravity varies, in buildings it is probably the centre and at the base of the structure. That's my assumption, but it's an educated guess and an obvious answer, unless of course I'm wrong. In terms of building our tower, I think we should have one realllllllyyyyyy long, but thin tube that will give our structure the height, supported by a large, heavy base... even though it's only newspaper.

Projectile Motion Questions

I could only find two cases. Case #1 and #3

Egg Glider

Our group doesn't have an idea but I guess we'll all come up with our own and bring it together soon. I'm not too familiar with aerodynamics and things like that, but from what I remember, I know that it has to be shaped somewhat like a paper airplane or a kite. I'm guessing that a point at the front (which the both the kite and paper airplane have) is something that will help with the egg glider's ability to glide. Last but not least, I know for a fact that both sides have to be symmetrical in order for it to glide straight.


But from what I've briefly researched on Google, aerodynamics is something designed to minimize the drag as an object moves through gas or liquid.
Now you may ask, "What does drag mean?"
Drag is air resistance or friction, where it slows down the object as it moves through gas or liquid.


So I guess my ideas are like a kite or a plane with the sheet of newspaper as the "wing" or surface area and the straws as supports. Now for the real question, how will the egg be protected while still allowing the glider to glide...? Maybe some sort of cone made out of the straws so that when the cone hits the ground, the force will transfer from the tip of the cone and pass right around the egg to the end of the cone. But I don't have a clue as to how to make that support aerodynamic as well. Maybe there is no way.

Kinematics Homework pg. 72

question 58 was a bit confusing....

(for some reason the picture doesn't appear but if you click it, the picture alone will appear)

Kinematics Graph Translations (lab results)

My original plan was to have my translated graphs placed after the computer given/walked graphs but this blog is very stubborn and will not let me and I have lost the energy to redo everything AGAIN, so here it is:
 

 

Graph 01b



Graph 01c

Graph 01d

Graph 01e



Graph 01f



Kinematics Graphs

Today, we used motion detectors and a graph program to do our lab activity. We were given graphs, either distance vs time or velocity vs time, and we had to walk them accordingly. Though I wasn't too excited to do this lab at first, due to all the graphs we had to "describe" as a pre-lab activity yesterday, my feelings had changed during and after the lab. To me, this wasn't just a lab, it was a game. It was a game to beat everybody else's ability to match the graph and make mine better. Though it seems like a childish goal, it was still something I felt I HAD to achieve. In the end, I had one amazing graph that was almost IDENTICAL to the given graph. I must say, I am quite proud of myself.
The black line represents the given graph that must be matched and the red line represents the graph that one has walked.

(for some reason, the x axis seems to have disappeared)

To walk these graphs, you would have to start at the given position (a certain distance away from the origin or from the motion detector) and walk towards or away from that origin. The velocity may be consistent or may increase/decrease and sometimes you may have to stop. These factors all vary as the graphs are different and have different variables. 

Right Hand Rules #1 and #2

Finding current and magnetism would be difficult without these visual, hands-on actions to help one solve the current and magnetism of conventional current flow for conductors (RHR#1) and coiled conductors/solenoids (RHR#2).
*note, all of these should be done with the RIGHT HAND, hence the name/title of these rules

RIGHT HAND RULE #1
Hold the conductor with the thumb pointing towards the direction of the conventional current flow (from +ve to -ve). The rest of your fingers should curl around the conductor and these curved fingers will point to the direction of the magnetic field of that conductor.
Current is represented by I and the magnetic field is represented by B.


RIGHT HAND RULE #2
Hold the coiled conductor with the rest of the fingers (meaning excluding the thumb) pointing towards the direction of the conventional current flow. The thumb should point to the direction of the magnetic field within the coil. On the outside of this coil, the thumb points towards the north pole of the electromagnet. This electromagnet follows the same lines of force/magnetic field lines as a normal magnet. The current flow from the north pole to the south pole in curved lines.


*NOTE:

Therefore, when using this for RHR#1, point thumb towards you or away from you to figure out the magnetism.