Feed my darlings!

Isley
Harjar
Aeolus
Bloodfeast
and don't forget Freddie!


Some of you may have noticed me coughing and hacking in class this past week. Well, as all sick boys are wont to do, I drank hot water. And since my parents are unwilling to invest in a water heater, I have to rely on my trusty microwave. It lives in the corner of the kitchen.

The inside of the microwave contains a glass plate that rotates to ensure that the food (or water) inside the microwave is heated evenly. Last year in chemistry, we learned how a microwave works, so go dig out your notes.

Sorry peoples, no exciting noises in this one.

While the cup with the water moves in a circle, its total angular motion in its period (approximately 10 seconds) is zero as it has the same initial and final positions. Also, according to the reference frame of the glass plate, there is no motion whatsoever of the cup as it stays in one place (static friction). But when an outside observer looks into the microwave, the cup (and the glass plate) are experiencing uniform circular motion!

We Work sooooooo hard

Curiously, most of the stuff we do after school has no relevance to physics. It's nice to see my peers working hard still. :)

RE: Centripetal Acceleration; It's NOT a vibrator

WARNING: If you did not read ANDREW WU's 11/1 blog, go read it first. or this will make no sense whatsoever. YOU HAVE BEEN WARNED. :P







Just in case anyone was wondering what Hao was doing in Andrew Wu's blog last week, here's a video proving that I am not obscene.

部落格

This week was an especially stressful week. Why did all(most) of my teachers all schedule a test this week? Explains why I stay up late at nights. Yesterday, when I was doing my physics, I collapsed on the bed to find my Hamtaro staring at me.

That gave me quite the scare. <*0*<

There is a fan in my room. And it keeps me cool as I close all the windows, doors, and curtains. The fan has a speed of 102 revolutions per minute and a radius of 0.39 m. Therefore, according to physics:

T=2pir/v

1.7 s=2pi(o.39 m)v

v=1.44 m/s

That's the velocity for the edge of the fan blades. Also:

Ac=v^2/r

=(1.44 m/s)^2/0.39m

=5.32 m/s^2

That's the centripetal acceleration of the edge of the fan and it always points toward the center. I would want to calculate the centripetal force, but my parents would not let me take the fan off the ceiling and mass it. Here's a video of the fan starting up. It has not reached its maximum velocity yet during this video, so don't doubt my counting skills.

Let's hope we have all seen a fan before...

My Saturday

So today, we played cards.


























GO DUSTIN! щ(ﾟДﾟщ)

...Yeah, that's it. （ ´,_ゝ`)

Don't Forget the Padding!

I remember seeing a huge hole in one of the cellos (or was it double bass?) in the music library over the summer. That person was probably not very careful. But, if that cello was in a case, it could have been saved from a grievous injury (and then sent over to the Music Center of Hawaii for repairs which cost the school a whole bunch of money). So, this cello case. It's very comfy. I remember Sumil sleeping on a whole pile of them and Cole doing things off to the side... Ahem. So the cello case is padded, and this padding will wrap around the cello when it is dropped, increasing the time of the collision on the cello, thereby reducing the force and the chance of a crack. However, if the momentum is too much, the cello will crack anyway because the padding will not be able to cushion the fall enough. This is because the cello was built to withstand a maximum impulse. If either the momentum is too large or the time too small, the cello will crack, making Mrs. Hafner very angry. The styrofoam thingies that people put when packaging teacups have the same principle (minus the Hafinator). Tea is good...

The violin, on the other hand, will crack anyway. But trumpets will never crack, just dent. :P

So what does Doc chew from that cup of his? Many things could be possible- ice, popcorn kernels, mochi crunch, bean pops, etc. Hmmm...

Burglary

So this Friday I went to Andrew's house with Richard to study for PSAT (unbelievable fact in itself). So Andrew lives in an apartment complex where the elevator is a failure. One could simply hold the door closed with one's hands. By the way, Richard is inside feeling claustrophobic. The forces present in this situation are the static friction force between me and the ground, the static friction force between my hands and the elevator door, the force generated by a motor to open the door and the force I use to hold the door back. Since neither the door or I are moving, the acceleration is zero so the net force is zero. The force that I use to oppose the elevator door must be equal to the force that the motor inside the wall generates. Neither of these forces is enough to overcome the static friction force between me and the ground or the static friction force between my hands and the elevator door so I don't slide on the ground and my hands don't slide on the door. Andrew and Richard are my partners in crime.

We look like burglars, no?
I kidnapped an Andrew.







(Jackson)