22. Which energy transformation occurs in an electric iron? A. heat to light C. heat to electricity B. light to heat D. electricity to heat 23. Which is the correct energy transformation existing in television set? A. Electrical sound light B. Electrical ► light sound C. Electrical light mechanical sound D. Electrical mechanical light sound 24. How is light energy different from sound energy? A. Light energy moves slower than sound. B. Light helps you see while sound lets you hear. C. Light energy uses vibrations while sound does not. D. None of the above. 25. Candle when lighted can be a source of energy. Which forms of energy is/are produced by a candle? 1. Heat II. Electrical III. Light IV. Sound A. I and II B. I and III C. II and II D. III and IV 26. Which of the following pulley is used to raise the flag to the top of the flagpole? A. movable pulley C. block and tackle pulley B. single fixed pulley D. fixed and movable pulley combined 27. How does an inclined plane assist a person in moving heavy loads up the ship? A. It loses the loads up. B. It lifts the load without exerting effort. C. Less effort is needed to move the heavy loads. D. More effort is needed to move the heavy loads. 28. You would like to watch workers in a construction where powerful pulley systems being used to lift heavy weights. You become curious about how machine work What will you do to avoid accident? A. get near the construction area B. watch them from a safe distance C. stay away from the construction area D. ask the workers to let you hold the machines 1​