That’s right. This is for your own good, not for a grade.
I have written a series of tutorials explaining HTML and posted them to my web site. You may consult them to learn how to make the web page that you will submit for your second labor. (If you choose, you may consult other tutorials on the web as well, or instead of these.) Read the first one, which explains what HTML is and steps you through making and displaying a simple HTML file (web page) of your own.
Then, actually make your HTML file and upload it to the “Assignments” tool on Sakai, under Assignment 5.
Answer one, and only one, of the following questions.
These questions are for you to combine different ideas from the unit and apply them to situations not directly addressed in class or in the textbook. Think about the situation, and about the physics that applies to it. See me for help if you are stuck.
If a car tire loses pressure, it flattens onto the pavement. Why? Explain what is happening in terms of pressure, force (weight is a force), and area.
When you did the “balloon mash” activity in class, you probably saw that the weight/area ratio increased as the weight on top of the balloon increased. Why did it do that?
Gases, such as air, expand when heated. Why? Explain it in terms that should make sense to a fifth-grader. Your explanation should cover:
Your explanation does not need to be entirely verbal. You may include diagrams, or specify a demonstration to use in your explanation as well.
How vigorously a stream of water shot from a hole in the side of a can depended only on the depth of the hole below the surface of the water. It did not matter how wide or narrow the can was, or what shape the can was, or if there were rocks in the can. Why was this?
To fully answer this question, you need to explain what one factor determines how far the stream of water spurts, and why that depends only on depth below the waterline.
Why do some things float on water, but others do not? Yes, things with a density less than that of water float and things with a density greater than water sink, but why will they float or sink?
You may have heard that “heat rises.”
When you squeezed the 2-L bottle hoding the floating test-tube diver, the test tube sank. What made it sink?
To fully answer this question, you need to explain why the diver floated in the first place, and what changed to make it sink.
Take your choice of these tasks. Do not submit answers to more than one of them. Just choose one, and submit it. Your answer should thoroughly address all points of the question. An adequate answer will be several paragraphs long.
Warning: Do not turn in paper that has ragged edges! If you write your work in a spiral-bound notebook, trim the edge before submitting it. Papers with ragged edges will be returned unmarked.
You may submit your answer as an electronic file using the “Assignments” tool in Sakai if you wish.
Copyright © 2006, Richard Barrans
Revised: 10 October 2011. Maintained by Richard Barrans.
URL: http://www.barransclass.com/phys1090/hw/hwk_05_fluids.html