Lecture2PHY2048 - PHY2048 - Physics with Calculus 1 Meet:...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
PHY2048 - Physics with Calculus 1 Meet: Periods 4, 5 (10:40-11:30, 11:45-12:35) M W F. Prof. Rinzler Office: NPB 2251 Ph: 392-5656 [email protected] Office Hrs, Grading… see Syllabus on course web site: Goto www.phys.ufl.edu , The Syllabus is mandatory reading . You MUST attend the period for which you are registered Only e-mail to this address will receive a reply. Click “Courses”, “PHY2048” Prof. Mueller Office: NPB 2370 Ph: 392-8521 [email protected] Instructors:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
First part of reading, homework & exam schedule: Complete schedule at www.phys.ufl.edu . Click “Courses”, “PHY2048”, “Schedule”.
Background image of page 2
Bam, Iran, population ~100k after magnitude 6.5 earthquake (2003). Tragically ~25,000 dead L.A., CA, USA population ~20M after magnitude 6.7 earthquake (1994). 54 dead. Knowledge is power . Not just the power to destroy, but power to save lives. (Here appreciation of the physical principles that led to implementation of building construction codes for earthquake tolerant structures)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Scientific and Engineering Notation 6000000000000 m Meant to handle large and small numbers Distance to Pluto decimal Representation scientific engineering Radius of hydrogen atom 0.0000000000530 m 6.00x10 11 m 5.30x10 -11 m 6.00e11 m 5.30e-11 m Common Prefixes Giga – 10 9 Mega – 10 6 Kilo 10 3 milli 10 -3 micro – 10 -6 nano 10 -9 e.g. 1 nanometer = 1x10 -9 m 5 kilometers = 5x10 3 m
Background image of page 4
Fundamental Physical Quantities Composite Quantities (combinations of above) e.g. length velocity time = velocity Acceleration time = 2 mass length Force time = 2 kg m s = (Newtons) : m s 2 : m s SI Units meter (m) Second (s) Kilogram (kg) Length (distance) Time Mass
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How important are units? Mars Climate Orbiter Cost: $125 millon 4 years to build Launched Dec. 1998 Time to Mars: 10 months Crashed on planet! Why? Lockheed-Martin sent thruster specifications to navigation programmers at NASA-Jet Propulsion Laboratories (JPL) in English units (pounds) but JPL thought they were specified in metric units (Newtons) .
Background image of page 6
Converting units Consider: 1 min = 60 sec 60 s 1 1min = Rearrange to make conversion factor Suppose want to convert to seconds. 1hr 60min = Now, 1 hr = 60 min. s 60 min = multiplying something by this, is equivalent to multiplying by 1 (so long as we retain the units!) s 60 min 60 =⋅ 1 3600 s =
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Suppose we want to know how many generations there have been since the first known hominid fossils dated to be ~6.5 million years old. 1 generation = 20 year year 20 generation Then, 2 66 years years 6.5x10 years 20 130x10 generation generation ⋅= Huh. .. ? That’s is not meaningful. We needed the years to cancel out. We needed the inverse of this conversion factor, i.e. This method is very general. 65 1 generation 6.5x10 year 3.25x10 generation 20 year ⎛⎞ = ⎜⎟ ⎝⎠ Estimate: So we each have at least 325,000 generations of great grandparents
Background image of page 8
Suppose you’re on the highway, traveling at 110 km/hr (~70 mi/hr), tailgating 10 m (~3 car lengths) behind a truck, and you glance at the CD player for 2 seconds to bump it to your favorite tune.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/25/2011 for the course PHY 2048 taught by Professor Field during the Fall '08 term at University of Florida.

Page1 / 30

Lecture2PHY2048 - PHY2048 - Physics with Calculus 1 Meet:...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online