ch. 1  Density: When is it constant, when does it change ? [34 points]

While the course pedagogy = problem based learning / guided inquiry and cooperative group work, this chapter and the next chapter's goal is primarily to develop your group work skills. In subsequent chapters (i.e. ch. 3 henceforth) will increasingly reflect the problem based learning pedagogy.

Reminder: group manager decides upon CW versus HW.

In this chapter and any subsequent chaper, when you / your group have any questions, ask ! Also, take textbook reading notes & class notes

Zumdahl textbook: ch. 5 measurement & calculation

1.1  CW / HW: ngss textbook - groupwork [6 points]

Engage: Toying with matter - record observations

Part A. Wave Toy. in lieu of actual lab, see video

Part B. Candles in liquids; in lieu of actual lab, see similar video

Why does an object float versus sink in a fluid ? - use below resources to address this question.

use a free body diagram to describe the situation; label all vectors

what is Archimedesâ€™ principle ? relate to preceding content

relate the relative density of an object and the density of the fluid, where the object floats versus sinks; basis / rationale ?

use a simulation to explore these concepts; e.g. rationalize the behavior of a submarine as it submerges vs surfaces; e.g.  text or animation

and / or

integrate preceding content; ai chatbot might be helpful

1.2   CW / HW: ch. 5 "blue" chem textbook; # 39d, 40ab; 56abd, 57, 59, 60, 61 [self score; 14 points]

1.3   CW / HW: phet: Virtual lab activity - groupwork [6 points]

select: "Compare"

select: "Same mass"

determine the density of the 4 objects

select: "Same volume"

determine the density of the 4 objects

select: "Mystery"

select: "set 1"

identify the objects by its color

identify the object - basis / rationale; include any simulated data & calculations

1.4 density lab: reminder = there's a prelab assignment, which is due on the day of the lab, where the prelab assignment will prepare you for the lab.

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1.1. ngss textbook [CW / HW; self-score; 6 points]

Engage: Toying with matter

Part A. Wave Toy. in lieu of actual lab, see video

record / describe observations

speculate on the basis / rationale of your observations ?

Part B. Candles in liquids; in lieu of actual lab, see similar video

record / describe observations

speculate on the basis / rationale of your observations ?

Explain: Sink or float & Explain: Mind over matter

1.2. phet Virtual lab activity;CW / HW [6 points]

select: "Compare"

select: "Same mass"

determine the density of the 4 objects

identify the objects by its color

select: "Same volume"

determine the density of the 4 objects

identify the objects by its color

select: "Mystery"

select: "set 1"

identify the objects by its color

identify the object - basis / rationale; include any simulated data & calculations

1.3. read, take notes on the below content, and group disscussion on content [8 points]

Libretext. [CW / HW: self-score; 4 points]

ch. 2.5 conversion factors

ch. 2.6 density as a conversion factor

chem textbook [CW / HW: self-score; 4 points]

ch. 5.6 dimmensional analysis (or ch. 5.3A in online textbook)

ch. 5.8 density (or ch. 5.3C in online textbook)

1.4. HW / CW: ch. 5 chem textbook; # 39d, 40ab; 56abd, 57, 59, 60, 61 [self score; 14 points]

1.5. density lab: reminder = there's a prelab assignment, which is due on the day of the lab, where the prelab assignment will prepare you for the lab.

1.6. sink or float ? [CW / HW; self score; 5 points]

Why does an object float versus sink in a fluid ? In your response; include:

use a free body diagram to describe the situation; label all vectors

what is Archimedesâ€™ principle ? relate to preceding content

relate the relative density of an object and the density of the fluid, where the object floats versus sinks; basis / rationale ?

integrate preceding content; ai chatbot might be helpful

might wish to use a simulation to explore these concepts; e.g. rationalize the behavior of a submarine as it submerges vs surfaces

(optional) hints; video demonstrations

• Buoyant force equals weight of displaced liquid (~ 2 : 25)
• Buoyancy Demo: Steel Balls (~ 1 : 02)
• Fluids, Buoyancy, and Archimedes' Principle (~ 4 : 15; ignore 1st minute; includes free body diagram, but don't like its labels)
• How a submarine rises and sinks (~ 2 : 22; some "errors" in narration)
• Submarine Ballast Tanks (~ 4 : 05)