Question:
Goal: how to clean coffee maker

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Fill the water chamber to its full capacity with equal parts white vinegar and water. I used the carafe to measure equal parts of each. Run a half brew cycle: Start a brew cycle. Midway through the brew cycle, turn off the coffee maker and let it sit for an hour.

Question:
Goal: What supplies are needed to make an infinite LED tunnel?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
- wooden bar (80cm X 3cm X 1cm) - copper wire - 20 leds - a semi-reflective mirror - an ordinary mirror (the same size of the semi trasparent one) - a DC transformer (3V or the same voltage needed by the leds) - glue - saw - soldering gun

Question:
Goal: How to chop wood for a good fire.

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Use a sharp axe and dry wood. It will split very easily usually with one or two hits.