Blog 9: "It's Electric!"

Last week I got some new pajamas.  I got a long sleeve t-shirt and some silk shorts.  They are very comfortable and I sleep with them on every night.  When I wake up and go to the bathroom in the morning to change, I have to take off my shorts.  I noticed a couple of days ago that when I took off my shorts they made a crackling sound and I felt the hair on my legs move.  This was because my legs and my shorts became charged by friction during the night.  The charge that was created was due to skin and hair's tendency to become positively charged and although silk also becomes positively charged, its magnitude is very smaller.  When I took my shorts off, the extra electrons on the shorts transferred to my legs.  The movement caused the sound of the sparks and the extra electrons in my leg caused my hairs to stand on end.

Blog 8: Disc Sapce

I was working on my computer this weekend.  I had plenty of review to do to prepare for semester exams and spent a lot of time online.  However, everyone needs a break and after a couple of hours of working, I took one myself.  I just searched around my desk and I saw a small disc, the kind used in the mini DVD video cameras.  It contained a video that me and my friends took early in the first quarter for a class project.  After watching it and enjoying a good laugh, I put in a game disc to play a little video games.  I noticed that once I closed the tray my computer's fan began working harder and my computer got hotter.  I realized that since I inserted a bigger disc it had a higher moment of inertia due to its mass and distance.  This meant it required more energy to spin than the mini DVD disc.  Due to its bigger moment of inertia, my computer eventually returned to normal since it also takes more energy to stop the disc spinning.

Blog 7: Genki

This weekend my friends and I had a get together.  I live along kalanialeole highway and a couple of our friends were going to run the Honolulu Marathon, so the plan was to stay over at my house and watch them running.  However, we stayed up pretty late and we were too tired to wake up.  When we woke up towards the later morning, we were pretty hungry.  Since the marathon was going on, we did not want to drive someplace, so instead we walked to Genki Sushi.  There I noticed the presence of centripetal acceleration on the track where the sushi is placed.  The track needs to turn in order to complete the circle and allow the sushi to continually circulate.  This creates centripetal force on the track.  It's track has sharp turns in it which creates large centripetal force since a lower radius yields a higher force.  However, the sushi on the track does not fly off on a tangent from the circle since its frictional force is higher than the centripetal force.  It would be pretty ridiculous for us since we sat right by the turn.

Blog 6: Soda

For the long Thanksgiving weekend, one of my friends hosted a pool / barbecue party.  It was real fun and everyone enjoyed their time.  We played cards, grilled food, relaxed in the jacuzzi, and some people sang karaoke.  But as usual me and my friends were messing with each other.  They thought it would be funny to shake up my soda while I was not looking and watched me open it.  After it blew up, I realized that it was a explosion reaction.  An explosion reaction's equation, which is the combined mass of all the components' multiplied by its velocity is equal to the mass of the separate components multiplied by their individual velocities.  This means that the soda's momentum which left the can was equal to the can's momentum.  Although this is true, the can looked like it had no momentum.  Since its velocity was in the direction of the ground, its force acted upon the ground, but the ground's mass is so large that it experienced zero acceleration.

The can left me a little wet and a little annoyed, but they got messed up later.

Blog 5: Math Attack

On Sunday I was busy doing homework.  I started pretty late, but I almost finished all of my homework by 11.  All I had left to do was complete my math homework and do this physics blog.  Unfortunately, I spent the whole Saturday night registering for the December SAT.  I thought it would be a quick process, but it took hours on end.  I also had an appointment earlier in the day on Sunday, so I was very tired by the time I am writing this blog.  I tried to lift my devastatingly heavy textbook out of my bag, but it was too heavy and I dropped it on my foot.  I knew that because of my physics homework all of the book's potential energy was converted into kinetic energy which transferred into my foot.  I finally stopped crying and wrote the blog.

Blog 3: Never on Saturday

My phone woke me up yesterday.  It was Austin reminding me to come to the Leo Club community service project.  I hated myself for signing up especially since it started at 8:30 am.  I arrived an hour early and waited for Austin to show up to thank him for reminding me.  Being the co-president, Austin showed up relatively early, at 8 o'clock.  I snuck up behind him and called out, "FALCON," he looked around and just as I said, "PAUNCH!" and slugged him across the face and he immediately blacked out.  The force of my punch was great due to Newton's second law stating that force equals mass multiplied by acceleration.  I began to panic wondering if anyone would care or notice that Austin was missing, but I soon felt foolish.  I wanted to dispose of the evidence so I dragged the body to Lawrence's house, rang the door bell, and ran away.

Blog 2: Oops I Forgot

Yesterday I went outside to enjoy the day when an object crossed my view.  I returned a tennis ball that my five-year-old neighbor accidentally threw into my yard.  I needed to throw it over a 3.0m fence, but I wanted to throw it so that it barely cleared the fence.  I was standing .50m away from the fence and threw overhanded, releasing the ball at a height of 1.0m.  This created a parabolic shape since the acceleration is -9.8 m/s/s.  The vertical velocity stays constant despite gravity.

However, I forgot the extensiveness of my strength and accidentally launched the ball 2000m away into the neighborhood park.  I told my neighbor to go get it, but when her father started laughing and telling her to hurry up I felt bad.  I reluctantly pulled my neighbor behind me as she desperately tried to escape my grasp.  Once I got to the park I heard my name and I looked around.  I saw my friend Lawrence in a tree.