PSC-1121 Lecture Set #1. This week. We will have a “pre-test”. We will begin to study time and standards. We will begin to use the clickers even though registration lists may not be ready. As I write this, I am not sure that WebAssign rosters have been done yet. Pre-Test.
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Buddy you're a boy make a big noisePlayin' in the street gonna be a big man some dayYou got mud on your faceYou big disgraceKickin' your can all over the placeSing it!We will we will rock youWe will we will rock youBuddy you're a young man hard manShoutin' in the street gonna take on the world some dayYou got blood on your faceYou big disgraceWavin' your banner all over the placeBuddy you're an old man poor manPleadin' with your eyes gonna make you some peace some dayYou got mud on your faceBig disgrace-Somebody better put you back into your place
But .. What is SOUND???
If a tree falls in a forest and there is nobody around to hear it fall, does it make a sound?
We will discuss this “g-thing” when we
get to acceleration.
Rolex (~$10K) Atomic Clock (NASA) $ megabucks
112 quarter notes per minute.
Hermann Ludwig Ferdinand von Helmholtz Born: 31 Aug 1821 in Potsdam, Prussia, GermanyDied: 8 Sept 1894 in Berlin, Germany
Let’s quickly review GRAPHS
1 box = 1 month
The Dow Jones Industrial Average (CNN-money 7-08
10 years of data – a different view!
f=1000 sec-1= 1000 Hertz
12 holes in the outer ring
No .. You don’t have to know this stuff but we can still talk about it.
Period = 6 seconds
Frequency=1/6 per sec (Hz)
=0.16 sec = 160 ms
Length Standard .. The Gorf
1 2 3 4 1/8
= 4 1/8 Gorfs
The Standard Meter
Later, several standardized systems of measurement were developed.
1 hour = 60 seconds