True or false
1. Vibrating objects ate objects that move back and forth and produce sound as they move.
2. Except for light energy, all forms of radiant energy like radio waves, are invisible.
3. Sound energy is always produced but lost in the environment during energy transformation.
4. Too much radiation is harmful to a man's health.
5. Home appliances that use electrical energy make a man's work easier and give him a more comfortable life.