Physics Help

Classify each of the changes as a physical change or a chemical change. a. a block of ice melts b. a chemistry book is burned c. a dry leaf is crushed d. grass in the yard is cut e. an iron nail rust #PhysicalChange #ChemicalChange #Physics #Chemistry

The micrograph above gives an estimate of the volume fraction of the α phase to be 60%. As the density of Aluminum and Silicon are similar, we can estimate the wt% of α to also be 60%. With reference to the Al-Si phase diagram, estimate the composition of the alloy in terms on wt% Si #PhaseDiagram #Eutectic #PhysicsHelp #Physics

Physics Help: Phase Diagrams: Between which phase fields is the solidus, liquidus, solvus phase #Solidus #Liquidus #Solvus #LeverRule

Save the image of the phase diagram above and use the Graph Reader site to make accurate reading from the phase diagram image to answer the following questions for a (61.9 wt% Sn - 38.1 wt% Pb) alloy: 1) What is the melting point of pure lead ( 2) What is the melting point of pure tin ( 3) At what temperature does the alloy start to solidify ( 4) At what temperature does the alloy completely freeze ( 5) If the sample is rapidly cooled from , what is the mass fraction of eutectic in percent of the solid at room temperature? #PhaseDiagram #PhysicsHelp #Techniques

Physics Help: Match the microstructures to the average carbon content ranges of the specimens

What phases will most likely be present in the solid formed from cooling a melt of composition: 90 wt% Mg - 10 wt% Pb at a moderate rate? #PhysicsHelp #PhaseDiagram #Techniques #Solutions

Physics: Phase Diagrams: Which phases are in equilibrium at 1000C for nominal composition 30% B? #PhysicsHelp #PhaseDiagram #Diagram #Techniques

Physics Help: Phase Diagrams: What reaction occurs at point b, f, i, l, o? - Three phase reactions #PhaseDiagrams #ThreePhaseReactions #PhysicsHelp

The microstructure of an Al-Si alloy contains 12 wt% eutectic and 88 wt% proeutectic , what is the composition of the alloy in wt% Si units? Assume the room temperature microstructure is the same as the phase/microconstituent content just below the eutectic temperature. #PhysicsHelp #PhaseDiagrams #Techniques

A 2.0 kg mass is rotating on a circular path with a radius of 30 cm. If the speed of the mass is 2m/s , what is its angular momentum? #PhysicsHelp #AngularMomentum #Physics