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aluminum boat project
aluminum boat project
Question about variables on a science fair project.?


My son is in the 5th grade and is doing a science fair project. He is testing the buoyancy of a aluminum foil ball filled with ten pennies, compared to a aluminum foil boat filled with ten pennies.
Now this may be cheating, but I have no idea what to do, so I can't help him much so I need some help.
What are variables? And how are they used here?
Thanks.

Variables are the parameters you control, and the effects you measure. There are two kinds -- independent variables and dependent variables. For example, the shape of the aluminum foil is an independent variable. You control it. The buoyancy of the pennies in the foil is a dependent variabe. It depends on the independent variable. If your experiment was to measure the effect of sunlight on plant growth, the independent variable would be "time in the sun," and the dependent variable might be "growth of the plant."

You might measure buoyancy by simply determining if the objects sink or float. Alternatively, you could measure the amount of water displaced by the objects like this: Fill a measuring cup (ideally with many markings for precise measurement) with water. Put in the foil-pennies, and see how much the water level rises. This is a measure of how deep the objects sank.



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Canopy-smaller boat


Canopy-smaller boat


$199


Keeps you cool and protected from the harmful UV rays of the sun. In a sudden rainstorm, it keeps you dry. PVC Coated polyester canopy & folding aluminum tubing. Easily folds down on the water to make room when it's time to go fishing.

Boat Carry Bag


Boat Carry Bag


$49


The real time saver of this bag design is the way it wraps around the boat hull. You don't have to spend time folding the boat to the exact proportions of the bag. Just roll up the boat and place on the open bag, and wrap the flaps around it. This bag is compatible with our 10.6sr.

12.6sr Deluxe Inflatable Boat Package


12.6sr Deluxe Inflatable Boat Package


$2099


The 12 ft. 6 inch long Sport Runabout is a mid-sized inflatable sport boat with plenty of room. Large enough to be considered a serious transom boat yet light enough to be placed inside or on top of an average vehicle. Best of all there's no trailer required.
The rounded bow shape increases cargo space, buoyancy, fuel economy and makes for a softer ride.
The inflatable Drop Stitch Floor Package keeps the overall hull weight at just 108 lbs. verses 147 lbs. with plastic floorboards. That's over 25% lighter while still able to carry up to 6 adults or 1600 lbs.

14sr Deluxe Inflatable Boat Package


14sr Deluxe Inflatable Boat Package


$2499


The 14 ft. Sport Runabout is sure to be a favorite of larger groups as well as police and fire departments alike.
This rugged boat can carry up to seven adults and gear and is able to accommodate up to a 40 hp/long shaft engine. So this boat can really move!
The 4" inflatable external keel allows it to cut through chop with ease and the rounded bow design has increased buoyancy, fuel efficiency, cargo space and provides for much a easier ride.

10.6sr Deluxe Inflatable Boat Package


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$1649


The 10 ft. 6 inch long Sport Runabout makes for an excellent, lightweight ship to shore tender and all around great boat.
The rounded shape maximizes interior space for cargo, creates less drag on the water, provides a much smoother softer ride and improves fuel efficiency.
The inflatable Drop Stitch Floor Package keeps the overall hull weight under 100 lbs. while still able to carry 5 adults or 1200 lbs. with ease.

10.6sry Deluxe Inflatable Boat Package


10.6sry Deluxe Inflatable Boat Package


$1449


The 10 ft. 6 inch long Sport Runabout now in high visibility yellow makes for an excellent, lightweight ship to shore tender and all around great boat.
The larger vessels are sure to see you coming and going, especially at night and the bright yellow is easily seen from above. The rounded shape maximizes interior space for cargo, creates less drag on the water, provides a much smoother softer ride and improves fuel efficiency.
The extra wide 6" Rubbing Strake provides an added layer of protection and the inflatable Drop Stitch Floor Package keeps the overall hull weight under 100 lbs. while still able to carry 5 adults or 1200 lbs. with ease.

12.6sry Deluxe Inflatable Boat Package


12.6sry Deluxe Inflatable Boat Package


$1899


Now in high visibility yellow, the 12 ft. 6 inch long Sport Runabout is a mid-sized inflatable sport boat. Large enough to be considered a serious transom boat yet light enough to be placed inside or on top of an average vehicle. Best of all there's no trailer required.
The extra wide 6" Rubbing Strake provides an added layer of protection and the rounded bow shape increases cargo space, buoyancy, fuel economy and makes for a softer ride.
The inflatable Drop Stitch Floor Package keeps the overall hull weight at just 108 lbs. verses 147 lbs. with plastic floorboards. That's over 25% lighter while still able to carry up to 6 adults or 1600 lbs.

285fpb Pro Inflatable Pontoon Fishing Boat Package


285fpb Pro Inflatable Pontoon Fishing Boat Package


$899


The unique U-hull configuration of this one man fishing boat provides the maximum fishing space with the least amount of hull weight.
It can be used two ways - in it's lightest configuration, without a wooden floor using the inflatable Pro Angler Seat and rowing with the included oars or fully rigged, with wooden floorboard for standing and casting, pedestal swivel seat for 360° fishing while sitting, motor mount for small gas or electric engines. Weighing only 38 lbs, with the Pro Angler Seat this is a super lightweight, super portable fishing craft. Even when equipped with floorboard, motor mount, and swivel seat this boat weighs only a total of 72 lbs.
The NEW Hunter Green 285fpb is a stealthy inflatable boat that's perfect for fishing or hunting. It goes anywhere, sets up in just 5 minutes and can fit in the trunk of a car.

12.6sr Drop Stitch Deluxe Inflatable Boat Package


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$2099


The 12 ft. 6 inch long Sport Runabout is a mid-sized inflatable sport boat with plenty of room. Large enough to be considered a serious transom boat yet light enough to be placed inside or on top of an average vehicle. Best of all there's no trailer required.
The rounded bow shape increases cargo space, buoyancy, fuel economy and makes for a softer ride.
The inflatable Drop Stitch Floor Package keeps the overall hull weight at just 108 lbs. verses 147 lbs. with plastic floorboards. That's over 25% lighter while still able to carry up to 6 adults or 1600 lbs.

SE 8 Startup Inflatable Boat Package


SE 8 Startup Inflatable Boat Package


$299


The New Redesigned Sea Eagle 8 offers an I-beam constructed floor for increased strength and rigidity. This floor has a single conveniently located deluxe fill valve that coincides with a thru floorboard valve cut out for easy and convenient valve access. Although newly redesigned the SE 8 still remains a lightweight, affordable, inflatable fishing boat that is super stable, easy to row, and works great with small gas or electric motors.

SE 8 Fisherman's Dream Inflatable Boat Package


SE 8 Fisherman's Dream Inflatable Boat Package


$549


The New Redesigned Sea Eagle 8 offers an I-beam constructed floor for increased strength and rigidity. This floor has a single conveniently located deluxe fill valve that coincides with a thru floorboard valve cut out for easy and convenient valve access. Although newly redesigned the SE 8 still remains a lightweight, affordable, inflatable fishing boat that is super stable, easy to row, and works great with small gas or electric motors.

10.6sry Drop Stitch Deluxe Inflatable Boat Package


10.6sry Drop Stitch Deluxe Inflatable Boat Package


$1449


The 10 ft. 6 inch long Sport Runabout now in high visibility yellow makes for an excellent, lightweight ship to shore tender and all around great boat.
The larger vessels are sure to see you coming and going, especially at night and the bright yellow is easily seen from above. The rounded shape maximizes interior space for cargo, creates less drag on the water, provides a much smoother softer ride and improves fuel efficiency.
The extra wide 6" Rubbing Strake provides an added layer of protection and the inflatable Drop Stitch Floor Package keeps the overall hull weight under 100 lbs. while still able to carry 5 adults or 1200 lbs. with ease.

SE 9 Startup Inflatable Boat Package


SE 9 Startup Inflatable Boat Package


$349


This lightweight, affordable, inflatable fishing boat holds up to 4 people, is super stable and works great with small gas or electric motors.

SE 9 Fisherman's Dream Inflatable Boat Package


SE 9 Fisherman's Dream Inflatable Boat Package


$599


This lightweight, affordable, inflatable fishing boat holds up to 4 people, is super stable and works great with small gas or electric motors.

124smb Start Up Inflatable Boat Package


124smb Start Up Inflatable Boat Package


$499


The largest of Sea Eagle's motormount boats, this roomy and durable inflatable fishing platform is just a fraction of the cost of other fishing boats. The 124smb is even portable enough to pack in a car trunk.

124smb Fisherman's Dream Inflatable Boat Package


124smb Fisherman's Dream Inflatable Boat Package


$699


The largest of Sea Eagle's motormount boats, this roomy and durable inflatable fishing platform is just a fraction of the cost of other fishing boats. The 124smb is even portable enough to pack in a car trunk.

10.6sr Swivel Seat Inflatable Boat Package


10.6sr Swivel Seat Inflatable Boat Package


$1849


The 10 ft. 6 inch long Sport Runabout makes for an excellent, lightweight ship to shore tender and all around great boat.
The rounded shape maximizes interior space for cargo, creates less drag on the water, provides a much smoother softer ride and improves fuel efficiency.
The inflatable Drop Stitch Floor Package keeps the overall hull weight under 100 lbs. while still able to carry 5 adults or 1200 lbs. with ease.


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Description

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Waterproof rate: IP 67
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Voltage 10-30V DC
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Base Color Black
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Description

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New boat project

{ 3 comments }

XzQqzh7p October 23, 2010 at 1:38 pm

I know that if you weld aluminum poorly your welds will develop/promote stress cracks. I just spent the day fixing stress cracks (among other things) in aluminum boat, and they weren’t even in welds! Sure paint is fine but will require more maintenance. But then again, it’s economical. Powder coating is generally tougher and a flat textured finish makes your DIY project look just that much more professional. I did a custom roof rack once and it looked great powder coated. But yea, I would paint a trailer. I like IronClad Alkyd paint from Benjamin Moorefor projects like that. Two coats with an HVLP sparyer and you’ll have pro results.

Audrey May 31, 2011 at 5:52 am

No but mine used to keep junk in the basement. One day I hauled it all outside for the trash collection. That was the end of that.

SL_SF June 3, 2011 at 6:07 pm

That's very nice, Eugene, but this is Yahoo! Answers, and all we can provide here is answers to questions. Not money. You're in the wrong place.

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