As a safer alternative to using a craft knife, squeeze the straw into the scrap-booking punch about halfway and punch out a notch. One point of a star-shaped punch does a great job.
The material used to make the needles themselves also varies considerably between manufacturers, as proprietary alloys are used to maximize strength and durability. While Ethicon and Covidien products ... If your institution subscribes to this resource, and you don&apost have a MyAccess Profile, please contact your library&aposs reference desk for information on how to gain access to this resource from off-campus.
(A) The water pressure in fire hydrant is about 500,000 pascals (about 5 times atmospheric pressure). When the firefighters attached a hose directly to a fire hydrant, they find that water won&apost flow out of the hose above the 10th floor of the building, located about 50 meters above the sidewalk. Why won&apost the water flow?
Before making your final design, you need to find the best way to cut joints in the drinking straw. How big should the notch be? How close you come to cutting all the way through the straw? Use one of your straws to find out. If you have straws from different sources, try a few notches in all the different types of straws to see which straws work the best.