Yesterday I made an I beam out of cardboard and compared it against just 6 strips of cardboard. The I Beam held up more weight than the pieces of cardboard. I don’t have anything else to say so I did some more research on the I beam and found out that there is a formula to figure out how strong the I Beam will be compared to other shapes. This is called area moment of inertia, and, yes I memorized this, the formula for an I beam is, assuming the I beam is on it’s x axis (I’ll put a picture down below of the I beam) is : I sub x = (a h^3/12) + (b/12)(H^3-h^3). If on the y axis, then it is  : I sub y = (a^3h/12) + (b/12)(H-h). The number you get at the end is just a representation that you can use to compare with other shapes. The a is the width of the web, h is the height of the web, H is height of the whole thing, and B is the width of the flanges. Why 12? It’s derived from physics, and I’m not going try to figure that out. The rectangle cardboard is more simple it is I sub x = bh^3/12 and I sub y is b^3h/12. b and h is base and height. The higher the number you get, the more weight the beam can withstand. The website I learned this from is called Engineeringtoolbox.com and it has lots of other interesting stuff about engineering.

I beam picture

 

I woke up, used mechanical energy to get out of bed, I went downstairs to eat. When I was eating, I  used mechanical energy, to swallow the food, then, my stomach used energy to break down the food and create more energy. Then I went to take a shower, I turned the knob which used mechanical energy, and since the knob had potential electrical energy, it now turned in to kinetic electrical energy, and turned the shower on. It was too cold so I turned the knob even more, which converted electrical energy, into thermal energy, which then heated the water up. After that I went back to sleep and waited until it was lunch.

For my post about Swift playgrounds, I decided to do You Are Always Right. This level uses the while loop, and you can also use anything else you have learned before from previous levels.
So in my code I used the while loop and also the if/else statement. At first I used this code that made me keep going in circles, and not collecting the final gem, so I tweaked the code, adding another if statement, and I finally got the gem and finished the level. This was hard to figure out and it took lots of trial and error, even if the code looks relatively simple. In total this code took about 15-20 mins to figure out, and after I did that I moved on to the Intro to Algorithms.

Energy is the amount of work an object can do or is doing, usually measured in joules. Energy cannot be destroyed nor created, only changed or transferred, in an isolated system. This is known as the law of conservation of energy, which is the first law of thermodynamics, which along with two other laws explain the relationship between heat and other energy. It also explains how energy can be lost through heat.

One halloween night, I was strolling down the streets when something flickered. I looked, nothing, so I kept walking but then I thought I saw it again, I looked and saw it. A light flickering like a old light bulb that doesn’t work. It seemed to be calling me over. I walked closer, then I realized something.  It’s coming from the graveyard, I thought. But my curiosity took over me and so I went down into the lonely graveyard. I walked into the graveyard, closer and closer to the light, down rows of old stone slabs marking the death of a loved one. Then I saw the source of the flickering light, it was a girl, she looked no more than 11 years old.

“Hello?”, I asked, “What do you want?”

She made this motion with her hand, come. She lead me to a grave. I read it, Angelina Martice 1981-1990.

“ Is that you”, I questioned, not expecting an answer.

“ Yes”, said the girl. Only then did I realize that the girl did have an eerie atmosphere and was kind of see-through.

“ You, can speak?”

“ Yes but I must at the spot of my death”.

“ Why did you bring me here?”

“ It gets quite lonely in this area”.

Once again my curiosity took over and I started asking her  questions. “Where did you live before you died”, “How did you die?” and so on.

She answered calmly, “ All your questions will be answered in a matter of time. I can show you everything, including death”. Had I been listening closely none of this would have happened, but I got lost on everything.

“You wouldn’t mind showing me?”

“Not at all, just sit on my grave”

“What?”

“Sit on my grave!”

“Why?”

“Didn’t I tell you all your questions will be answered soon!”

“ Well, if you say so”, I said. I sat down when there was a sensation that I could not describe. It was as if I was falling at millions of miles per hour and being spun around at the same speed. Suddenly it stopped. I saw a town it looked like the one that I live in but it looked older.

“Where am I?”, I asked

“YOU ARE IN MY MEMORIES”, Angelina Martice’s voice said, “IT IS MY STRONGEST ONE”.

“Which one is that one?”

“I AM ANSWERING YOUR FIRST TWO QUESTIONS, WHERE I LIVED AND HOW I DIED”.

“So where is this place?”
“WHERE YOU LIVE NOW BUT IN 1990”.

“How did yo-”

“WATCH!!”

I saw a girl, probably Angelina, in a witch costume, running around with her friends, I saw very original halloween costumes, skeletons, werewolves, monsters and witches. They went trick or treating for a while and then everyone left but Angelina. She was walking slowly, like in a trance, towards the graveyard, and then once in ,stopped and kneeled down. A female ghost appeared. They talked for a while and then Angelina sat down and closed her eyes. A man in black snuck up on her and stood there. The ghost told Angelina something and she spun around….. Then everything blacked out.

“What happened?” I said after I got off the gravestone.

“That’s all I remember”, she said, glancing behind me.

“What were you talking about”.

“She was showing me her memories and how she died”.

“ Wait, what!”, I spun around and I saw him, a man, dressed in black, his face covered with black soot, I saw something sharp glinting in his hand, a bright red. And then….. It fell.

 

This wallpaper not only decorates your room but it also protects you from a fire. The wallpaper is fireproof. They are made from nanowires, a wire or rod that measures a billionth of a meter  The wallpaper is made from hydroxyapatite a mineral found in bones and teeth. It is also fire resistant. Regular wallpaper is usually has cellulose, and cellulose catches fire quickly. Ying-Jie Zhu lead this research team that made this wallpaper. The wall paper also, when it gets really hot, it sounds an alarm. “The smart-fire-alarm, fire-resistant wallpaper will be helpful for public safety,” Zhu hopes. He also saidit holds the prospect of “saving human lives and reducing the loss of property in a fire.”