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46 Cards in this Set
 Front
 Back
Mechanics

study of motion and its causes (ex. falling objects)


Thermodynamics

study of heat and temperature (ex. melting and freezing)


Vibrations and Waves

study of specific types of REPETITIVE motions (ex. springs)


Optics

study of light (mirrors, lens)


Optics

Study of light (ex. mirrors, lenses, color)


Electromagnetism

Study of electricity, magnetism, and light (ex. electrical charge, circuits)


Relativity

Study of particles moving at any speed (ex. particle collisions, nuclear energy)


Quantum mechanics

Study of submicroscopic particles (ex. atom and its parts)


Scientific method

The procedure for good scientific investigations


Scientific method step 1

make observations and collect data that lead to a question


Scientific method step 2

Formulate and objectively test hypotheses


Scientific method step 3

Interpret results and revise the hypotheses if necessary


Scientific method step 4

State conclusions


Model

a replica or description designed to show the structure or workings of an object, system, or concept


System

a set of items or interactions considered a distinct physical entity for the purspose of study


What do models do?

Simply the problem to help build understanding, hypotheses, and design of experiments


Dimension

a description of WHAT KIND of physical quantity is represented by a measurment (ex. length, mass, time)


Units

a description of HOW MUCH of a physical quantity is represented by a measurment (ex. meters, kilograms, seconds)


What is SI?

its the standard measurement system, "Systeme International"


How many base units in SI?

Seven  first three are length, mass, time


What are Derived units?

Measurements that COMBINE the base units (ex. speed is m/s and Newton is kg x m/s2)


atto

10 to the minus 18 (symbol a)


femto

10 to the minus 15 (symbol f)


pico

10 to the minus 12 (symbol p)


nano

10 to the minus 9 (symbol n)


micro

10 to the minus 6 (symbol greek mu)


milli

10 to the minus 3 (symbol m)


centi

10 to the minus 2 (symbol c)


deci

10 to the minus 1 (symbol d)


deka

10 to the plus 1 (symbol da)


kilo

10 to the plus 3 (symbol k)


mega

10 to the plus 6 (symbol M)


giga

10 to the plus 9 (symbol G)


tera

10 to the plus 12 (symbol T)


peta

10 to the plus 15 (symbol P)


exa

10 to the plus 18 (symbol E)


accuracy

describes how close a measured value is to the TRUE value of the quantity


precision

refers to the degree of exactness with which a measurement is made and stated


What are the two problems that limit accuracy?

Method error (different methods are used) and instrument error (instrument is not in good working order)


What are significant figures?

those digits in a measurement that are known with certainty plus the first digit that is uncertain


Sig. Figures rules for zeros

Significant if (1) between nonzero # (2) at end of #; not Sig. if (1) zero in front of # (2)zeros at end of # and left of decimal


Rules for calculating Sig. Figures

add/subtract (same as smallest # to right of decimal); multiply/divide (same as smallest # oof sig. figures)


Rounding Rules

Down if (below 5 or 5 with zeros after); Up if (above 5 or 5 with nonzeros)


Greek letter for "difference or change in"

delta (the triangle)


Greek letter for "sum or total"

Sigma (the funny E)


Dimensional Analysis

dimensions can be treated as algebraic quantities (add, subtract, divide (cancel), multiply (gives exponents)
