ii e t sice melting pointice pointice watericeland crystaliceland sparicosahedronideal electron gasideal gasideal radiatorideal solutionidentificationidentity elementignitionignition pointilluminationiminoureaimipiramineimmersion heaterimmiscibilityimmiscibleimmiscible solventimpact parameterimpact strengthimpedanceimperfect gasimpermeable membranceimpregnateimproper axisimproper rotationimpulseimpurityimpurity conductivityinin linein phasein phase vectorsinactiveincandescent sourceincidence angleincidence planeincident lightincoherenceincoherentincoherent scatteringincoherent wavesincongruent meltingindependent variableindeterminacy principle