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3 years ago

describe a general rule for predicting the motion of an object that is being pushed or pulled by unbalanced forces?

Chemistry

1 answer:

7nadin3 [17]3 years ago

6 0

7th grade activities

Force and Motion

(with Work)

2010-2011

Outline of Topics:

1. Describing Motion: Graphing, Speed and Velocity

2. Describing Motion: Changing Velocity

3. Forces, Their Sizes and Direction

4. Force and Mass

5. Its a grave matter: gravity and inertia

6. Weight and Mass

7. All work and no play: Work and Energy

Appendices

1: 7th Grade Vocabulary Related to Force and Motion

2: Motion Detector Directions

3: Day 1 Graphs with Focus Question at the End

4: Day 1 Data Collection Sheet

5: Day 2 Student Problem Sheet

6: Day 2 Second Set of Problems

7: Day 2 Graphs for is the Velocity Changing

8: Day 3 Student Tables with Questions

9: Day 4 Frame for Science Notebook

10: Day 5 Skateboard Prediction and Actual Sheets

11: Day 6 Data Table

12: Day 7 Student Handout

13: Day 7 Force Arrows

14: Day 8 Data Analysis

15: Uncovering Student Ideas in Physical Science probes

16: National Enquirer advertisements

17: Excerpt from Joy Hakim’s The Story of Science: Newton at the Center, pages 172-183

18: Directions for converting You Tube videos to another media file

First topic: Describing motion

A three-day exercise

Learning goals

Reviewed from 6th grade (day 1):

I can interpret a position versus time line graph to determine types of one-dimensional motion of an object.

I can draw a position versus time line graph given appropriate data.

I can represent changes in motion in a variety of ways, including words, motion arrows, graphs, and by acting out.

(Day 2) I can use the information in a position vs. time graph to determine the speed of an object.

New for 7th grade: I can define velocity.

(Day 3) I can distinguish between speed and velocity.

Topic Word Bank

Speed Motion Velocity Direction Position Graph Distance Vertical Time Horizontal Rate of change Representation Slope Negative Positive

Sequence of Experiences Day 1: Interpretation of a Position/Time Graph Pairs and whole group 10 minutes Day 1: Creation of a Position/Time Graph Lab groups and whole group 25 minutes Day 1: Making Sense of Multiple Representations Whole Group 10 minutes Day 2: Calculating Speed Pairs and whole group 23 minutes Day 2: Differentiating Speed and Velocity Pairs and whole group 18 minutes Day 2: Exit Slip Individually 5 minutes Day 3 Intro Whole class 3 minutes Day 3:Collecting Initial Data In pairs 12 minutes Day 3:Interpreting Data Parts 1 and 2 In pairs, then groups of 4 20 minutes Day 3: Student Challenge Day 3: Class Discussion Whole class 7 minutes Day 4: Intro Day 4:Interpreting Data Parts 3, 4 and 5 Whole class Day 4: Processing Information Individual and Paired Day 4: Class Discussion Whole Class Day 4: Exit Slip Individually 3 minutes

Day 1 Focus Question: What can be learned from different representations of motion?

Materials and Preparation:

For the class:

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PLEASE HELP

swat32

Answer:

1461.7 g of AgI

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

CaI₂ + 2AgNO₃ —> 2AgI + Ca(NO₃)₂

From the balanced equation above,

1 mole of CaI₂ reacted to produce 2 moles of AgI.

Next, we shall determine the number of mole AgI produced by the reaction of 3.11 moles of CaI₂. This can be obtained as follow:

From the balanced equation above,

1 mole of CaI₂ reacted to produce 2 moles of AgI.

Therefore, 3.11 moles of CaI₂ will react to produce = 3.11 × 2 = 6.22 moles of AgI

Finally, we shall determine the mass of 6.22 moles of AgI. This can be obtained as follow:

Mole of AgI = 6.22 moles

Molar mass of AgI = 108 + 127

= 235 g/mol

Mass of AgI =?

Mass = mole × molar mass

Mass of AgI = 6.22 × 235

Mass of AgI = 1461.7 g

Therefore, 1461.7 g of AgI were obtained from the reaction.

5 0

3 years ago

Please select the word from the list that best fits the definitions

Mamont248 [21]

Erm i’m afraid we need the list

7 0

3 years ago

PLS HELP NEED EMERGENCY HELP

Alinara [238K]

Answer:

Explanation:

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3 0

3 years ago

Which reaction has the highest atom economy for the production of C02?

In-s [12.5K]

The highest atom economy

2CO + O₂ ⇒ 2CO₂

<h3>Further explanation</h3>

Given

The reaction for the production of CO₂

Required

The highest atom economy

Solution

In reactions, there are sometimes unwanted products that can be said to be a by-product or a waste product. Meanwhile, the desired product can be said to be a useful product, which can be shown as the atom economy

of the reaction

the higher the atomic economy value of a reaction, the smaller the waste/ byproducts produced, so that less energy is wasted

The general formula:

Atom economy = (mass of useful product : mass of all reactants/products) x 100

or

Atom economy = (total formula masses of useful product : total formula masses of all reactants/products) x 100

So a reaction that only produces one product will have the highest atomic value, namely the reaction in option C

4 0

3 years ago

Calculate the pH when the following quantities of 0.100 M NaOH solution have been added to 50.0 mL of 0.100 M HCl solution: (a)

yuradex [85]

Answer:

Explanation:

ned help too^^

7 0

3 years ago