Match Stick Rocket
CONTRIBUTED BY: Steve Culivan, KSC
EDITED BY: Roger Storm, NASA Glenn Research Center
- 2 match book matches or wooden stick matches
- Small square of aluminum foil
- Paper clip
- Safety pin
- Take one match and wrap a small piece of aluminum foil around the match-head. Wrap the foil tightly.
- Make a small opening in the foil wrapped around the match head by inserting the point of a safety pin and bending upward slightly.
- Bend the paper clip to form a launch pad as shown in the diagrams. Erect the match stick rocket on the pad. Make sure the pad is set up on a surface that will not be damaged by the rocket’s exhaust such as a lab table. Several layers of foil on the lab table work well.
- Ignite the match by holding a second lighted match under the foil until its combustion temperature is reached.
Caution: Be sure the match rocket is pointed away from people or burnable materials. it is recommended to have water or some other fire extinguishant available. The foil head of the rocket will be very hot!
DISCUSSION: The match stick rocket demonstrates Isaac Newton’s Laws of Motion as they relate to rocketry. Newton’s third law states that for every action, there is an opposite and
equal reaction. The exhaust of the fire products from the burning match (smoke and gas) is the “action” and the movement of the rocket in the other direction is the ‘reaction.’ The action thrust is produced when the match burns in an enclosed environment. The aluminum foil acts as a rocket combustion chamber. Because the opening in the foil is small, pressure builds up in the chamber that eventually escapes as a rapid stream of smoke and gas.
In an interesting variation of the experiment, try making holes of different diameters to let the combustion products out at different rates. A larger opening permits the smoke and gas to escape before it has time to build up much pressure. The escape of the products will be slower than produced by a match stick rocket with a smaller opening. Isaac Newton’s second law states that the force or thrust of a rocket is equal to the mass of the smoke and gas escaping the rocket times how fast it escapes. In this experiment, the mass of the smoke and gas is the same for both cases. The difference is in how fast it escapes. Compare the distance traveled with the two match stick rockets.
via Match Stick Rocket.
- Rare V-2 rocket on display in Everett (q13fox.com)
- 6 Clever Tricks You Can Do with Aluminum Foil (gizmodo.com)
Clark and the Pigeons
Posted: June 11, 2013 in Dialog, Prose
11 June 2013
This morning I sat beside Clark. He said, “I was told that Joy doesn’t use this spot when it’s raining, even though, with the overhang from the library, I’ve been able to keep quite dry.”
“That’s right,” I said “Or a few days after check day.”
“Yeah, I can see that.” Within minutes a dark-colored pigeon jumped up on Clark’s knee. He looked me up and down, from side to side, then hopped back down.”
“He seems friendly,” I said.
“Yeah, at my other spot I feed them. This is the alpha male. I’ve seen him mating with four or five of the females around here. That gray one over there is distinctive as well. Notice, she has only two toes on her left foot.”
I asked, “How do you think that happened — maybe a fight with a cat?”
“More likely a snare of some kind. I was talking to a lady who works at a bird sanctuary. She said they’ve noticed a lot of birds like this. They’ve yet to pinpoint where the snare is located, but they’re looking for it. They’d like to introduce a humane trap that wouldn’t injure the birds.
“A lot of restaurants serve it on their menu. Bought locally it goes for about three dollars a pound.”
“I’d far rather live in nature. Every time I come back to the city I can feel this wave of stress come over me. “
I said, ”I have a small cabin that I get away to most weekends. It has no heat, electricity or running water.”
“Have you ever thought about solar power. They’ve done studies that show it’s much less expensive than hydro. They’ve developed a new solar heat conduction vacuum tube in glass or metal. They’re also called evacuated heat pipes. You should give them a try.”
“I’ve heard that the government is cracking down on marihuana production.”
I said, “That seems silly, since people are licensed to grow marihuana for medical purposes. Why doesn’t the government just take over production. Then, there would be quality assurance and tax money coming in. With drugs on the street, you never know what you’ve getting.”
“When I was tree planting a lot of guys used to grow pot or halucinogenic mushrooms. They put the mushrooms into brownies. A guy from another camp came over, ate too many brownies, along with lots of liquor and nearly died.
“When I was in university I studied Psychology. I was mostly interested in Humanism. That’s an ideology that promotes reason, ethics and justice, while specifically rejecting supernatural and religious ideas as a basis of morality and decision-making. It makes sense to me.”
I said, “I like to keep an open mind. I listen to all ideas; accepting the ones with merit, rejecting the others. I’ve developed my own personal philosophy.
“Well, It’s time I headed to work. I enjoyed our conversation, Clark. I look forward to doing it again. Perhaps, the next time it rains.
- Pigeons Might Be Way Smarter Than We Give Them Credit For (theatlanticcities.com)
- The Science of Pigeon Pecking Behavior: Computer Crumbs Reveal Smart Birds (scienceworldreport.com)
from pathways for triumph of speed
over hominid pace
13 Monday May 2013
Reblogged from Be Late.:
“Technology” in practices of development is often understood in terms of a means-end schema toward modernization. More, technology becomes the conceptual frame to signify progress and modernity. Indeed, technological products — from manufactured tools, electronics, bridges to skyscrapers — become so many objects signifying change, of what is new and what is modern. What follows is a critical reconstruction and summary of Heidegger’s essay, “The Question Concerning Technology” (1954).
- Martin Heidegger Talks About Language, Being, Marx & Religion in Vintage 1960s Interviews (openculture.com)
- To be is to do. To do is to be. Doobie, Doobie, Do. (oldsaltbooks.wordpress.com)