How can the efficiency of a Thermos Flask be increased?
Place smaller plastic cup inside the larger plastic cup and fill the gap between the two cups with desiredinsulation material (paper, cotton, foil, rice, beans, etc.)
Fill the smaller cup with hot or cold liquid and wrap the entire thing in aluminum foil
Use tape to seal the thermos if necessary
Make a hole in top and insert a straw
How can the efficiency of bicycle pedals be increased?
Developing proper form and technique, (including a smooth pedal stroke), refining position and aerodynamics without losing speed and/or power ( these are two separate factors not necessarily tied together).
How can the efficiency of a lightbulb be increased?
LEDs are the most energy-efficient light bulbs. LEDs use semiconductors that convert electricity into light. They are the most expensive energy-saving bulb to buy, but because they use so little energy and last a long time they will save you the most money in the long term.
