Goal:
paper towel
Answer:
clean telescope

Goal:
telescope
Answer:
can see the moon close up

Goal:
How to paint the box for a solar air heater?
Answer:
Paint the box either black or any dark shade so that the heat is absorbed and trapped within the box for efficient heating.

Goal:
How to check your bicycle tire pressure by hand
Answer:
While you won't get an accurate reading you can approximately gauge proper tire pressure by pressing agains the top, on the tread, towards the rim. Squeezing the sides is not indicative of actual tire pressure.