Lab 1 pre-lab read carefully the "experimental uncertainties" document located in the resources folder of the lab course in sakai website. then answer the following (to be handed in at the beginning of lab 1) you decide to purchase an elliptical table for your apartment, but you need to make sure the area of the tabletop is large enough. while visiting your friend you find they have a table that might work but they aren't sure precisely what its area is. but neither of you know precisely what its area is so you set out to determine it. you do a bit of research and learn that the area of an ellipse is a = πab where a is the largest radius of the ellipse and b is the shortest. using a tape measure (smallest increment 1 mm) you, your friend, and their brother and sister each make a measurement of a and b you friend brother sister 96.4 cm 95.5 cm 94.7 cm 95.1 cm 55.1 cm 56.0 cm 54.8 cm 55.3 cm suggest reasons for why each measurement of a and b weren't exactly the same determine the area of the tabletop along with the uncertainty in it. after further research you find the manufacturer's specifications for the elliptical table: a = 95.25 cm and b = 55.245 cm. are these consistent with the measurements your group made? the area calculated from the manufacturer's specifications consistent with the area you calculated? explain how you decided a. b. c. in preparation for lab 1, review your class notes from the first lecture and read through chapter 33 sections 1 through 4 in the textbook.

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Fill in the blanks with the numbers is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance

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