This is a Free Service provided by Why Fund Inc. (a 501 C3 NonProfit) We thank you for your donation!

(1. Click on the course Study Set you wish to learn.) (2. If you wish you can click on "Print" and print the test page.) (3. When you want to take a test...click on anyone of the tests for that Study Set.) (4. Click on "Check Answers" and it will score your test and correct your answers.) (5. You can take all the tests as many times as you choose until you get an "A"!) (6. Automated college courses created from lecture notes, class exams, text books, reading materials from many colleges and universities.)

## Long-Term Learning

Learn efficiently and remember over time.

## Start Long-Term Learning

## Add this set to a folder

### 7 major areas of physics

mechanics, thermodynamics, vibrations and wave phenomena, optics, electromagnetism, relativity, quantum mechanics

### a pattern, plan, representation, or description designed to show the structure or working of an object, system, or concept

model

### a set of particles or interacting components considered to be a distinct physical entity for the purpose of study

system

### an explanation that is based on prior scientific research or observations and that can be tested

hypothesis

### an experiment that tests only one factor at a time by using a comparison of a control group with an experimental group

controlled experiment

### in an experiment to test a hypothesis, you must change _____ _______ at a time to determine what influences the phenomenon you are observing

one variable

### the description of what kind of physical quantity is represented by a certain measurement is called ________

dimension

### physical quantities that can be described as a combination of length, mass, and time (the three basic dimensions)

force, velocity, energy, volume, acceleration

### the description of how much of a physical quantity is represented by a certain numerical measurement

unit

### although each dimension is unique, a dimension can be measured using different ______

units (ex. time can be measured in seconds, hours, or years)

### measurements of physical quantities must be expressed in units that match the ________ of that quantity

dimensions

### a description of how close a measurement is to the correct or accepted value of the quantity measured

accuracy

### during an experiment if some measurements are taken using one method, and some are taken using another method ______ _______ will result

method error

### a lack of _______ is typically due to limitations of the measuring instrument and is not the result of human error or lack of calibration

precision

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

significant figures

### a common convention used in science to indicate precision is known as ________ _________

significant figures

### significant figures are the ones that we know for ______, as well as the first digit that is ________

certain -- uncertain

### in scientific notation, the measurement is recorded to a power of 10, and all of the figures given are _________

significant

### zeros that are at the end of a number and also to the right of the decimal are _________

significant (ex. 57.00 has 4 significant figures)

### significant figures rule for addition and subtraction

round the final answer to the first column from the left containing an estimated digit

### significant figures rule for multiplication and division

final answer has the same number of significant figures as the measurement have the smallest number of significant figures

### physicists use the tools of mathematics to describe measures or pre directed relationships between _______ ________ in a situation

physical quantities

### to make expressions as simple as possible, physicists often use ______ to describe specific quantities in an equation

letters