# Physical Science Final

 The flashcards below were created by user smyers778 on FreezingBlue Flashcards. what are the six self evident truths existencecausality position symmetryOccams razorTime Symmetry principle of non-contradiction 4 interactions in nature from strongest to weakest Nuclear strong, electromagnetic, nuclear weak, gravity Newtons First law If an object is at rest or is moving in uniform motion it will remain in that state unless another force acts on it. Newton's Second Law Force equals Mass times Acceleartion Newton's Third Law every action has an equal and opposite reaction equal and opposite forces Acceleration Rate of change of velocity per unit time, or change of velocity divided by the time required for the change Mass the characteristic of a body which determiines how much it accelerates when a force is applied weight a measure of the force of gravity pulling on an object Velocity the speed in a particular direction of a moving body In the absence of friction all objects fall... with the same acceleration regardless of their mass Electric Force Law pairs of objecst with similar charges repel each other and pairs with dissimilar charges attract each other with forces, F, that obey Newton's third law F=kQq/d(d) gas discharge tube J.J. Thomsondetermined that electricity had massatoms of gas in the tube were being broken down into charged fragments negative fragments always had the same mass discovered the electron Oil-drop experiment Milikanfigured out a way to determine the charge of an electron Pressure P=force/area Fluid anything that flows, includes air and water Pressure 1. depends on depth (greater at greater depth)2. pressure is the same depth for all points at the same depth 3. pressure at a given depth is independent of direction4. pressure is always perpendiculaer to the surface of the submerged object Bouyant Force a force pushing upward on objects immersed in fluid Density an object's mass divided by its volume Inertial Frame of Reference a perspective that is experiencing no acceleration non-inertial fram of reference a perspective that is undergoing an acceleration Time dilation the slowing of a clock as its speed approaches the speed of light as measured by an observer not moving with the clock Length contraction the shortening of an object along its direction of motion as its speed approaches the speed of light, as measured by an observer not moving with the object Mechanical waves A travelling disturbance in material that trasports energy equiblirium position The place where a malecule will reside when no unbalanced forces are acting upon it. Compression Wave a wave in which the molecules of a medium vibrate in the same direction as the wave propagates. also known as a longitudinal wave. Shear wave a wave in which the molecules of the medium vibrate at right angles to the direction the wave propagates. also known as a transverse wave reflection bouncing back of a wave refraction bending of a wave as it enters a new medium diffraction when waves bend past something interference two waves that combine together and either have constructive or destructive patterns electromagnetic spectrum Rabbits Mate In Very Unusually X-pensive GardensRadio wavesMicrowavesInfra-redVisible LightUltra-violetX-raysGamma Photoelectric effect (particle)• Electroscope charges negatively. Wave energy is determined by amplitude. Particle energy is determined by frequency. Turn up amplitude on electroscope photon can’t be discharged. Photon has no mass. Cant knock off electron. Electron absorbs energy from photon to jump off energy. BOHR MODEL. Light is a particle, not just a wave. Ionic Bonding metal and nonmetal, ions, electromagnetic force, transparent, high mp and bp, brittle, conducts when melted, dissolved, or vaporized (EX. SALT) Metallic BOnding : metal and metal, charged ions, sea of electrons, opaque (can’t see through) and shiny, high mp and bp, malleable, conductive (EX. ALUMINUM FOIL) Covalent: nonmetal and nonmetal, molecules, intramolecular forces (single, double, and triple bonds), transparent, low mp and bp, brittle (solid), not conductive (EX. WATER- 2 hydrogen and oxygen) - hydrogen bonding, dipole-dipole, dispersion (Vanderwaals à hold non-polar molecules together) Saturated Fatty Acids Saturated: longer chains, bigger dispersion forces, higher melting points, solid at room temp Unsaturated Fatty Acid kinky chains, weaker dispersion forces, lower melting points, liquid at room temp Transfats hybrid between the two. Double bond but straight. The worst for you. 5 ways to know whats inside the earth direct observationmeteoritesearths mass and densityseismologyearths magnetic fields 3 compositional layers of the earth Crust: High Oxygen SilicatesMantle: Iron and Magnesium SilicatesCore: Iron and Nickle 5 Mechanical Layers of the Earth Lithosphere: RockyAsthenosphere: PlasticMesosphere: SolidOuter Core: liquidInner Core: solid 5 evidences of continental drift jigsaw fit of the continents continental structure shield platform mountain belt paleontological evidence same fossil evidence on multiple continents paleoclimatic evidence glaciers, tropicspaleomagnetic evidence rocks formed from lava record magnetic fields Authorsmyers778 ID123422 Card SetPhysical Science Final Descriptionfinal exam review Updated2011-12-13T19:51:45Z Show Answers