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During a phase change the temperature of a substance .
(2 Points)
always increases
always stays the same
always decreases
varies

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

What is a metal replacement reaction

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?