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Physics 201

General Physics I(PHYS 201)

You must be signed up for a laboratory section!

Dr. J. Ulises Reveles

701 W. Grace St., Room 2417jureveles@.vcu.edu

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Syllabus for PHYS201

10 % In-class participationneed clickers latestby Wed (1/23), 2 lowest dropped

20 % Homeworkdue every Sunday by 8 pm in LON-CAPA, lowest dropped

20 % QuizzesIn-class, Wednesdays as per the schedule, lowest dropped

10 % LabsStart January 23. Print Manual from LC, lowest dropped

20 % Tests Two Tests taken from LC homework. In-class, closed book

20 % Final examIn-class, closed book

Final Exam: Wednesday May. 8 at 4 pm - 6:50 pm

Lecture: Harris0101 MW 5:30-6:45

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Expectations

Attend classes and participate

Complete Homework's, Quizzes, and Labs

Study for the TestsCheck your grades !

Projected final grades will be provided

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Syllabus Questions

If your clicker is broken or has dead batteries, can you still somehow

get credit that day? (a) yes (b) no

Can you ever make-up a homework or quiz? (a) yes (b) no

If you obtain 100 % in Quizzes, Labs, Tests, and Final exam BUTdo not do HWs and classwork, what will your final grade be:

(a) A (b) B (c) C (d) D

How many grades can you drop for the following:class work, labs, homework, and quizzes? (4-digit answer)

Have you used LON-CAPA before? (a) yes (b) no

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Topic 1: Metric System (SystmeInternational d'Units)

New measurement system in a new world after French Revolution.

Definition: Distance from north pole to equator = 10 million meters!

Two French astronomers led expeditions from Paris (1792-1799) tomeasure the meridian arc from Dunkerque to Barcelona.

Jean Baptiste JosephDelambre Pierre Franois AndrMchain

What is the circumference of the earth in km ?

(a) 10,000 (b) 1,000 (c) 40,000

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Usage of Metric System

What three countries (in red) do NOT use the metric system?

http://upload.wikimedia.org/wikipedia/commons/1/17/Metric_system.png

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Basics: Metric (or SI) System

1 meter= 39.4 inches (~3.3 ft)or 1 inch = 2.54 cm

Metric system is a foreign language for many of us!

Do you "think metric"? (height in cm, weight in kg, temp. in C)

If you dont think metric, then you must PRACTICE converting!

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Distance: Kilometers (km)

1,000 m = 1 km = 0.62 mi

OR 1.6 km = 1 mile

km/h

100 km/h = 62 mph

Think fast! Which is faster? (a) 100 km/h (b) 100 mph

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Speed Conversions

If you are racing on your bike at 10 m/s, what is your speed in mph?

Notice that a quick conversion between m/s and mph is to

simply double the metric velocity. The conversion is more

accurate if you add another 10% to your answer.

What is 30 m/s in mph?

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Very SMALL to Very BIG

10-16 metersGerm

Smallest particlesnaked eyes can see

10-6 mor 1 mm

Swine flu

virus

~1 m

109 m

1025 m

Known

universe

10-16 m=0.000000000000001 m

Sun

The size of the universe

(in meters) is a "1" withhow many zeros after it?

Quark

10-5 mor 10 mm

Google "scale of universe"

www.primaxstudio.com/stuff/scale_of_universe/

http://www.primaxstudio.com/stuff/scale_of_universe/http://www.primaxstudio.com/stuff/scale_of_universe/http://www.primaxstudio.com/stuff/scale_of_universe/http://www.primaxstudio.com/stuff/scale_of_universe/http://upload.wikimedia.org/wikipedia/commons/5/56/Baby_Universe.jpghttp://images.google.com/imgres?imgurl=http://cumbriansky.files.wordpress.com/2008/12/sun_021203.jpg&imgrefurl=http://cumbriansky.wordpress.com/international-year-of-astronomy-2009/&usg=__kolRhVAqO7c0eAlawf6flDWCFt4=&h=398&w=398&sz=19&hl=en&start=3&um=1&tbnid=geWDcRsea39z9M:&tbnh=124&tbnw=124&prev=/images%3Fq%3Dsun%26ndsp%3D20%26hl%3Den%26um%3D1http://images.google.com/imgres?imgurl=http://www.dreamstime.com/germ-bacteria-microbe-thumb1167092.jpg&imgrefurl=http://www.dreamstime.com/stock-photography-germ-bacteria-microbe-image1167092&usg=__7LbYL4wH79lrFi-qUAIJDuMLDFM=&h=300&w=300&sz=55&hl=en&start=57&um=1&tbnid=Aimc5789bzdPxM:&tbnh=116&tbnw=116&prev=/images%3Fq%3Dgerm%26ndsp%3D20%26hl%3Den%26sa%3DN%26start%3D40%26um%3D1

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Mass: Kilogram

The official kilogram is a cylinder composed of 90% platinum and 10%

iridium located in Paris.

How can you quickly calculate this conversion in your head?

NOTE: Actually, kilograms are a measure of mass and pounds are ameasure of weight (or gravitational force). The conversion above is only

true on the Earth!

1 kg= 2.2 pounds

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Mass Conversions

Think fast! Which is heavier? (a) 100 kg (b) 100 lb

An elephant has a mass of5,000 kg. How many pounds does itweigh?

Prof. Skrob weighs about 180 lbs. How many kilograms isthat?

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Water Mass and Volume: Liter (L) Bottle

1 L H20

1 liter (L) =1.1 quarts

1 gallon = 3.8 liters

1 L H201 kg

1 kg

Did you know before that 1 L of water equals 1 kg? (a) yes (b) no

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Measurement of Time

Ancient calendars: motions of

celestial bodies determine time.

Any periodically occurring event can be used for timekeeping.

Modern timekeeping: cesium (Cs) atomic clock (1967)

1 second = 9,192,631,770 f0 (frequency for Cs-133)

http://www scientificamerican com/podcast/episode cfm?id=cesium-clock-faces-ytterbium-challe-09-08-12

What is shown in the picture and how

does it work?

http://www.scientificamerican.com/podcast/episode.cfm?id=cesium-clock-faces-ytterbium-challe-09-08-12http://www.scientificamerican.com/podcast/episode.cfm?id=cesium-clock-faces-ytterbium-challe-09-08-12http://www.scientificamerican.com/podcast/episode.cfm?id=cesium-clock-faces-ytterbium-challe-09-08-12