Question

question 6. the student looks at the hot packs on the bench and determines the hot packs and the bench can be thought of as two interacting systems. the student wants to model energy flow and average kinetic energy of the particles at different locations as these two systems interact.

6a. follow these steps to complete the student’s model:
step 1: look at the six particle pictures, labeled a-f, below. each picture represents the motion of the particles at one location in the model.
step 2: move the picture into the location on the model that best represents the motion of the particles. each picture should only be used one time.
step 3: on the model, manipulate the arrow to show the direction in which energy is transferred between the hot pack and the cold bench in this system.

score
0 1 2

Explanation:

Step1: Analyze particle motion (hot pack)

Hot pack (45°C) has higher temperature, so particles have higher kinetic energy (more movement). Among A, B, C (more dynamic), order from most to least kinetic (top to bottom in hot pack? Or based on spacing/movement). Let's assume top of hot pack is hottest (closest to source), so most movement (C: most spread, then B, then A? Wait, D, E, F are more ordered (solids? Bench is cold, so bench particles are more ordered, lower kinetic. So hot pack: particles are less ordered, more movement. So hot pack boxes: top (hottest) → most movement (C), middle (B), bottom (A) (less movement as maybe heat is transferring out? Or maybe hot pack is a system, so from top to bottom, maybe temperature slightly decreases as heat moves to bench? Wait, no: hot pack is 45°C, bench 10°C. So energy flows from hot pack to bench (heat transfer: hot to cold). So particle motion: hot pack particles have higher KE (more speed, more spacing? Wait, D, E, F look like solids (ordered, close), A, B, C look like liquids/gases (more spread, movement). So hot pack (45°C) is a warmer system, so particles A, B, C (more dynamic). Bench (10°C) is colder, so particles D, E, F (more ordered, less movement). Now, within hot pack: top (maybe hottest part) → most movement (C: particles most spread, moving fastest), middle (B: less spread than C), bottom (A: least spread among A,B,C). Within bench: top (closest to hot pack, so slightly warmer? But bench is cold, so maybe top of bench (closest to hot pack) has slightly more movement than bottom? Wait, D, E, F: D looks most ordered (tightest), E next, F least ordered? Wait, no: D has dark particles with white around, E more white, F most white? Maybe D is coldest (most ordered), E middle, F least ordered (closest to hot pack, so slightly warmer). So hot pack (top to bottom): C (most KE), B, A. Bench (top to bottom): F (least ordered, closest to hot pack, so slightly more KE), E, D (most ordered, coldest part of bench). Then energy flow: from hot pack to bench, so arrow from hot pack to bench.

Step2: Assign particles

Hot pack (3 boxes): top → C, middle → B, bottom → A. Bench (3 boxes): top → F, middle → E, bottom → D. Energy arrow: from hot pack (45°C) to bench (10°C), so arrow pointing down from hot pack to bench.

Answer:

Hot pack boxes (top to bottom): C, B, A; Bench boxes (top to bottom): F, E, D; Energy arrow: from hot pack to bench (downward).