Aballoon filled with helium has a volume of 0.50 m3 at 21°c assuming the pressure and mass remain constant what volume will the balloon occupy at 0°c

satellites are frequently used to make observations of the orbit on earth

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.