A salad made with lettuce, cheese, tomatoes, onions, croutons and dressing is an example of a a: heterogenous mixture

b: homogenous mixture

Which of the following activities would conserve the most energy? installing a dimmer switch on a light using a blender instead of a food processor hanging clothes to dry on a clothesline instead of ironing them opening a window instead of turning on the air conditioning setting your computer's screen saver to turn on after less time has elapsed