words=[
"The+physical+quantities",
"Physics+and+the+laws+of+nature",
"Classical+physics",
"The+physics+of+the+twentieth+century",
"The+fisice+and+other+sciences",
"Physics+and+Technology",
"The+physical+magnitudes",
"The+operational+definition+of+a+quantity",
"Fundamental+values+and+derived+quantities",
"The+International+System+of+Units",
"Scientific+notation",
"Prefixes+and+powers+of+10",
"The+fundamental+values",
"Length",
"Mass",
"The+equivalence",
"The+measuring+instruments",
"Scope+of+a+tool",
"Sensitivity+of+an+instrument",
"Measurement+errors,",
"Accidental+or+random",
"The+result+of+a+measurement",
"No+result+of+measures",
"Absolute+error",
"How+to+write+the+result+of+a+measure",
"Agreement+within+the+error",
"Relative+error+and+error+rate",
"Relative+error",
"Percentage+error",
"Error+propagation",
"Direct+and+indirect+measures",
"Error+propagation+in+indirect+measurements",
"Errors+in+the+product+of+two+quantities",
"The+evolution+of+the+watches",
"The+derived",
"Area",
"Volume",
"Density",
"The+significant+digits",
"The+significant+digits+in+operation",
"Rounding+errors",
"The+significant+digits+in+the+calculator",
"Orders+of+magnitude",
"A+strategy+in+solving+physics+problems",
"Conversion+unit+of+measure",
"The+physical+dimensions+of+the+magnitudes",
"Problems+of+Fermi",
"Formulas+for+the+calculation+of+areas+and+volumes",
"Inverse+formulas",
"The+percentages",
"Representation+of+physical+laws",
"The+data+representation:+tables",
"The+data+representation:+charts",
"Graphical+representation+of+experimental+data",
"Relations+between+physical",
"The+direct+proportionality",
"The+proportions",
"The+linear+dependence",
"The+body+mass+index",
"The+inverse+proportionality",
"The+proportionality+quadratic",
"The+regression+line",
"Property+proportions",
"The+Cartesian+diagrams",
"The+simple+pendulum",
"Mass+Measurements",
"Measures+of+length",
"Measurements+of+surfaces",
"Measures+volui+solids",
"Graphical+representation+of+data+with+spreadsheet",
"Measurement+tools",
"Measure+the+size+of+a+counter",
"Measure+the+height+of+a+companion",
"Measurement+of+thickness+of+a+rod",
"Direct+measurement+of+an+area",
"Measurement+of+density",
"The+carriers+and+the+forces",
"Scalar+and+vector+quantities",
"Working+with+carriers",
"Vector+Addition",
"Sum+of+vectors+in+the+same+direction",
"Parallelogram+rule",
"Sum+of+more+carriers",
"Difference+of+two+vectors",
"Product+of+a+vector+by+a+number",
"Cartesian+components+of+a+vector",
"Resolving+vectors+along+two+lines+any",
"Resolving+vectors+along+the+coordinate+axes",
"Calculation+of+the+components+of+a+vector",
"Calculation+of+the+module+and+the+direction+of+a+vector",
"The+balance+of+the+solids",
"The+static+equilibrium",
"Material+point",
"Extended+body",
"Rigid+body",
"The+equilibrium+of+a+material+point",
"The+balance+on+a+horizontal+plane",
"The+balance+on+an+incline",
"The+balance+of+a+body+hanging",
"Equilibrium+of+a+rigid+body",
"Composition+of+forces+acting+on+a+rigid+body",
"Torque",
"Moment+of+a+force+couple",
"Conditions+of+equilibrium+of+a+rigid+body",
"Calculation+of+trigonometric+functions+with+scientific+calculator",
"Vector+addition+to+components",
"The+forces",
"Forces+are+vector+quantities",
"The+measurement+of+forces",
"Resulting+in+more+forces",
"The+weight+force",
"Difference+between+weight+and+mass",
"The+elastic+force",
"Hooke's+law",
"Attrico+dynamic",
"Static+friction",
"Scalar+product",
"Vector+product",
"Center+of+mass+and+balance",
"The+center+of+mass+of+an+extended+body",
"Balance+is+an+object+suspended",
"Balance+of+an+object+supported",
"The+stability+of+the+balance",
"The+levers",
"First+class+lever",
"Second-class+lever",
"Lever+of+the+third+kind",
"The+fluids",
"Fluid+balance",
"The+pressure+in+fluids",
"The+atmospheric+pressure",
"The+relative+pressure",
"Pressure+and+depth+in+fluids",
"Stevin's+law",
"The+measurement+of+the+atmospheric+pressure",
"The+communicating+vessels",
"Immiscible+liquids",
"The+principle+of+Pascal",
"The+barrel+of+Pascal",
"The+hydraulic+press",
"The+principle+of+Archimedes",
"Equilibrium+of+a+body+in+a+fluid",
"Floatation",
"How+to+determine+the+volume+of+a+body",
"Determination+of+density",
"The+motion+of+a+particle",
"Frames+of+Reference",
"Distance+Traveled",
"Shift",
"The+time+law+of+motion",
"Space-time+diagrams",
"The+speed",
"The+average+speed+climbing",
"Difference+between+average+speed+and+average+speed+climbing",
"Graphical+interpretation+of+the+mean+velocity",
"Instantaneous+speed",
"Graphical+interpretation+of+the+instantaneous+speed",
"The+uniform+motion",
"How+to+derive+the+law+of+motion+of+the+motion+by+the+space-time+diagram",
"Average+acceleration",
"Sign+of+the+speed",
"Sign+of+the+acceleration",
"Instant+acceleration",
"The+uniformly+accelerated+motion",
"The+relationship+between+speed+and+time",
"Orara+the+law+of+uniformly+accelerated+motion",
"Relationship+between+velocity+and+displacement",
"The+braking+distance+of+a+car",
"The+free+fall",
"The+effect+of+air+resistance+on+the+free+fall",
"The+acceleration+of+gravity",
"Free+fall+from+a+standing+to+a+height+h",
"Launch+downward+by+a+height+h",
"Throw+down",
"Motorcycle+on+curved+trajectories",
"The+circular+motion",
"Laws+of+motion",
"The+Newtonian+dynamics",
"The+First+Law+of+Motion",
"Inertial+reference+systems",
"Non-inertial+reference+systems",
"The+principle+of+Galilean+relativity",
"The+second+law+of+dynamics",
"Special+case+of+the+second+law+resulting+nothing",
"The+second+law+for+a+body+in+free+fall",
"Non-inertial+systems+and+apparent+forces",
"The+third+law+of+motion",
"Motion+along+an+inclined+plane",
"Horizontal+motion+in+the+presence+of+friction",
"Motion+along+an+inclined+plane",
"Oscillations+of+a+spring+and+a+pendulum",
"Work+and+energy",
"The+work+of+a+constant+force",
"Force+in+the+direction+of+displacement",
"Force+that+forms+an+angle+with+the+displacement",
"The+kinetic+energy",
"Theorem+of+kinetic+energy+or+vital+forces",
"The+work+of+the+weight+force",
"The+work+of+a+variable+force",
"The+work+of+the+spring+force",
"Power",
"The+consumption+of+electric+energy",
"Power+produced+by+a+body+in+motion",
"Conservative+forces+and+potential+energy",
"Non-conservative+forces",
"Potential+energy",
"Gravitational+potential+energy",
"Elastic+potential+energy",
"Conservation+of+mechanical+energy",
"Application+of+the+conservation+of+mechanical+energy",
"Work+of+non-conservative+forces",
"Conservation+of+total+energy",
"Energy+and+rollercoasters",
"Geometrical+optics",
"Light+rays",
"Speed+of+light",
"Light+Reflectance",
"Flat+mirrors",
"Spherical+mirrors",
"Equation+of+mirrors",
"Magnifying+mirror",
"The+refraction+of+light",
"Law+of+refraction",
"Optical+illusions",
"Refraction+of+plates+and+prisms",
"Total+reflection",
"The+optical+fibers",
"The+lenses",
"Converging+lenses",
"Diverging+lenses",
"Thin+lens",
"Lens+equation",
"Magnifying+lens",
"Optical+instruments",
"The+microscope",
"The+telescope",
"Mirages",
"Temperature+and+heat",
"Thermal+equilibrium",
"The+temperature+measurement",
"Celsius",
"Fahrenheit+scale",
"Kelvin+scale",
"Thermal+expansion",
"Linear+expansion",
"Volume+expansion",
"The+behavior+of+water",
"Heat+and+mechanical+work",
"Equivalence+between+work+and+heat",
"Thermal+capacity",
"Specific+heat",
"The+fundamental+law+of+thermodynamics",
"Calorimetry",
"Propagation+of+heat",
"Conduction",
"Convection",
"Irradiation",
"States+of+matter",
"State+changes",
"The+atomic+structure",
"The+states+of+aggregation",
"Vaporization+and+condensation",
"Boiling",
"Melting+and+solidification",
"Latent+heat"
]