a toy boat weighs 80 grams. What is the minimum volume for the boat if it just barely floats?

The 80g is going to displace that amount of fresh water, which is a volume of 80cm³.

So the minimum volume for it to 'barely float' is theoretically just that - 80cm³!

But that's not really a very good definition of your specification that it should 'barely float' because this volume will leave the vessel with no freeboard whatsoever and so will very quickly become swamped and cease to float at all. Which won't count.

So to give the boat a tiny bit of freeboard and thus increase the chances that it will 'barely float', for some period of time, if not troubled by ripples, the minimum volume could do with being increased to, say, 90cm³ for the same 80g displacement.

That's still not much freeboard though. If your length was 20cm and your beam 4cm, your height would still only be 1.125cm. (20 × 4 × 1.125 = 90).

And given that the displacement will already have taken up 1 of that 1.125 height for draft, that only leaves 0.125cm for freeboard (or 1¼mm) at that area and draft.

If you increase the draft to match the beam at 4cm each and reduce the length to 5cm, you can revel in half a centimeter of freeboard ...

(How minimalist does this spec get - are we talking meniscus?)

-|--)

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Large Breed Dog Toys

Most everyone seems to love the small dog breeds, and there are numerous dog toys, pet clothing, dishes, and other accessories that cater to small dogs. But pet manufacturers have noticed that there is a lack of items geared toward larger dogs, so many companies have started designing different items specifically for dogs over 50lbs. Toys need to be designed so that they can't be swallowed, but they must also be strong enough to withstand an extensive amount of chewing and tugging. Since larger breeds weigh much more than the smaller breeds, the typical small balls and pull toys aren't designed to withstand a large amount of rough play. Find out how to choose the right type of toy for your large pet.

 

Gripper Toys

One thing bigger dogs love to do is play tug-of-war, so you should invest in a few gripper toys. There are gripper balls which are larger rubber type balls that have a grip handle on top. These are perfect when playing with your dog because they will usually grab the ball, leaving the handle available for you to grab. Two dogs can also play with a tugger ball, especially if you get the largest size available.

There are also hard vinyl gripper toys that have a hook grip on two sides, making them the perfect toy for large dogs to get their teeth around for playing or chewing. When purchasing a gripper toy, look for one that is made of a sturdy material and won't break off into little pieces, causing a choking hazard.

 

Treat Dog Toys

These toys have become more popular over the years because they allow a dog to entertain itself. These toys are made of a sturdy material and have small holes in them. Small treats are then placed inside the toy. As the dog rolls, tosses, chews, and plays with this toy, the treats randomly pop out. Since the dog never knows when a treat will pop out, they continue to play with the toy out of expectancy.

 

Floating Toys

Many large dog breeds are known to be good swimmer. Golden retrievers and pit bull terriers are just two breeds that usually love the water and enjoy retrieving items from the water. Floating toys are designed with a buoyant core that prevents the toy from slipping beneath the water. Since some dogs will retrieve an item no matter how far it sinks, floating toys help prevent accidents.

Each dog has its own personality, and you will discover the types of toys your dog prefers. But if you keep a good collection of dog toys on hand, you'll always be able to entertain your dog whether you're home or off at work.

About the Author

Want to buy dog toys? Check out the pet store at http://k9capers.com. This online pet paradise offers a wealth of great products for happy and healthy pets.

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