140 likes | 280 Views
PHYSICS 114 Winter 2014 Instructor: Mike Steffancin http://tinyurl.com/phy114 Website userid : PHY114 pwd : PHYS&114. Confidence In Your Abilities. Life without confidence You doubt yourself You get stopped by small tasks You get walked on You are miserable You quit.
E N D
PHYSICS 114Winter 2014Instructor:MikeSteffancinhttp://tinyurl.com/phy114Website userid: PHY114pwd: PHYS&114
Confidence In Your Abilities Life without confidence • You doubt yourself • You get stopped by small tasks • You get walked on • You are miserable • You quit • Life with confidence • You believe in yourself • You overcome barriers and accomplish tasks • You are respected • You are happy • You persevere and succeed
Attitude Is Important • Gut "I don't fit here" reaction: • You are conditioned to believe that 60 - 75% is a bad grade • The person next to you got a 95% -- ARGH! • No one you see or talk to has your cultural background • You aren't exactly sure how to do something so you do nothing • You skip classes, wander off and don't come back • Better "I belong here" reaction: • A 75% on a physics or math test is a solid result • The probability that the person next to you will win the Nobel Prize is tiny • Everyone finds this challenging, but millions have taken physics and gotten through it--you can too • You try. If that doesn't work, you try something else. • You persevere, work on your study habits, learn from your mistakes and get some help and you thrive
How to Succeed • Work together. Social/communication skills are important in the workplace. • Get a mentor! • Join a club or other organization. • Get a part time job or internship. • Study a little each day. Don’t wait until the last minute. • Keep your work in a notebook. Save it for years. It may help with future classes and help you avoid transfer problems. • Don’t be afraid to be wrong. You will learn faster if you speak up and ask questions. • Come to class!
Homework • We use Webassign (WA) www.webassign.net • You need a access code to use WA. It is free for the first 2 weeks. • Can buy access code online (cheaper) or at bookstore. • Work together on homework, but don’t just copy someone else’s work—make sure you understand it. • You can't submit your answers after the deadline so don't be late! • To register for our WA course you will need the following class key: northseattle 9899 3045
We’ll begin by talking about how our distant ancestors observed and eventually solved the mysteries of what they saw in the sky… Careful observations are the first step in practicing science.
A piece of mammoth ivory, 32 thousand years old. There are twenty-nine notches followed by thirty notches carved on the ivory. What do you think this specific number of notches represent?
…the Moon’s phases repeat every 29.5 days. So a month is about a “moonth!”
In the early 1600's Galileo investigated the sky with telescopes, he saw craters on the Moon, the phases of Venus, and he discovered the four large Galilean moons of Jupiter, and more. Galileo introduced the experimental (scientific) method to science in the late 1500s. His many discoveries, including those with the telescope, furthered such exploration and experimentation in other parts of Europe.
Science is our accumulated understanding of the natural world. The steps of the scientific method are something like: • Careful observations are made of some phenomenon. • A speculative law, theoryor prediction is made to explain the phenomena. • The speculation is tested with many independent experiments. • If the speculation correctly predicts the results of the experiments, and if it is general enough to make new predictions that also prove to be correct, it may be accepted as a theory. • Of course, imagination, creativity, prior knowledge and perseverance are also used by scientists.
What is the difference between a law and a theory? • Laws are generalizations, principles or patterns in nature. • Theories are the explanations of those generalizations. • Theories do not mature and end up as laws! • Example: Newton’s Laws of motion and Law of gravity can be used to plan space flights with great precision. But there currently is no well accepted theory of gravity (gravity waves may end up providing the explanation, but there is little evidence supporting this). That is, no one knows exactly how or why gravity acts like it does.
In simple terms, physics is the study of matter and energy and space and time. Laws and theories are only our best descriptions to date of the things we have observed and are subject to change as new discoveries are made.