Design Report Design a Thermos
It’s time to complete your Design Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e. g., U2_ Lab_DesignAThermos_Alice_Jones. doc).
Problem and Constraints
1. What was the problem you tried to solve in your design challenge?
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2. What were the constraints of the design challenge?
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Plan
1. Draw a sketch of your design. Include labels and notes about how your design fits the constraints.
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Test
1. Describe the procedure that you followed to test your design.
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2. Describe the results of your design test.
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Evaluation
1. Evaluate your design by describing how well the device performed and whether it met the constraints and solved the problem.
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2. Revise your design by creating a sketch of an improved model. Describe how the new design is an improvement over the original.
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Problem #3 (ch. 1, problem 15)the ideal gas law provides one way to estimate the pressure exerted by a gas on a container. the law isí‘ťí‘ť=푛푛푛푛푛푛푉푉mo re accurate estimates can be made with the van der waals equationí‘ťí‘ť=í‘›í‘›í‘›í‘›í‘›í‘›í‘ ‰í‘‰â’푛푛푟푟â’푞푞푛푛2í‘ ‰í‘‰2where the term nb is a correction for the volume of the molecules and the term an2/v2is a correction for molecular attractions. the values of a and b depend on the type of gas. the gas constant is r, the absolutetemperature is t, the gas volume is v, and the number of moles of gas molecules is indicated by n. if n = 1 mol of an ideal gas were confined to a volume of v = 22.41 l at a temperature of 0â°c (273.2k), it would exert a pressure of 1 atm. in these units, r = 0.0826.for chlorine gas (cl2), a = 6.49 and b = 0.0562. compare the pressure estimates given by the ideal gas law and the van der waals equation for 1 mol of cl2 in 22.41 l at 273.2 k. what is the main cause of the difference in the two pressure estimates, the molecular volume or the molecular attractions?

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.