Question

which of the physical changes required energy​

Answer 1

$\huge \purple A \purple N \purple s \purple W \purple e \purple \R :-$

• Well physical changes are largely changes of state... i.e. a phase change, solid to liquid, liquid to gas,,,etc,, and certainly some of these processes involve the INPUT of energy. These physical processes involve the breaking of bonds in the condensed phase, and thus an energy input is required

Answer 2

Answer:

• Crushing a can.
• Melting an ice cube.
• Boiling water.
• Mixing sand and water.
• Breaking a glass.
• Dissolving sugar and water.Shredding paper.
• Chopping wood.