Week 15 (1-30-17) Plimsoll Lines

Plimsoll. Samuel Plimsoll is the guy we credit for giving us our International Load Line on the hulls of ships. And which is why we rarely hear the phrase International Load Line. Who wants to say International Load Line when you can say Plimsoll line and mean the same thing?

20170130_084754

From what we learned last week in class, different types of water ( salt water and fresh water) have different densities. And so, even though salt water and fresh water take up the same space, the more dense the water is (the saltier it is) items that sink in fresh water may still float in salt water.

20170130_085958

So what the Plimsoll lines do on a ship is indicate the maximum load a ship can be filled up with cargo in a certain type of water. Which is why the plimsoll lines are different for salt water and fresh water.

What we’re doing here in class is taking clay which is denser than fresh water and seeing if we can turn it into a structure–a boat of some type that will float.

20170130_085931

Most of us can do come up with something that doesn’t sink on the first try.

20170130_091630

But it doesn’t necessarily mean we’ve made the best structure to hold the most cargo.

20170130_085810_003

What we’re after is being able to build a boat that will hold the most pennies.

20170130_091527

This is my gold medal attempt at home. 27 pennies.

20170125_104239

And I felt slightly fantastic about this until Mrs. Ponraj’s boat…

20170130_090034

Held 34 pennies. Ridiculous.

20170130_090326

Ack. Must try harder.

20170130_091050

Which is what we all did.

20170130_091055

We pushed and molded and counted pennies, until each of our boats finally sank.

20170130_091102

Then Mrs. Meier made this gem. Which crushed all previous records, sinking at 39 pennies. Goodness.

20170130_091135

Mine, here, held 30 pennies good enough to tie for 3rd place. Sigh.

20170130_091930

See any good ones?

20170130_092021

Happy Day!

20170130_092442

Advertisements
This entry was posted in Experiments, Picture post and tagged , , , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s