All categories

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:

You might be interested in

Can someone help me to answer these Chemistry questions?

Andreyy89

Which ones in specific

3 0

3 years ago

Acetylene gas, C2H2, releases large quantities of heat when it burns, making it ideal for welding applications. This gas is gene

Karo-lina-s [1.5K]

Answer:

64 kg

Explanation:

The computation of the number of kg need to ordered is shown below:

As we know that

$CaC_2 + 2H_2O \rightarrow Ca(OH)^2 + C_2H_2$

Now as we know that

1 mole of $C_2H_2$ generated from 1 mole of $CaC_2$

Now

26g of $C_2H_2$ generated from 64g of $CaC_2$

And,

26kg of $C_2H_2$ generated from

= $\frac{64g\times26Kg}{26g}$

= 64kg $CaC_2$

Hence, the number of kg that required for ordering the calcium carbide is 64 kg

5 0

3 years ago

What do isotopes have in common

alexira [117]

Answer:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.

(if this help pls mark as brainliest :))

6 0

3 years ago

Read 2 more answers

Round the nearseat whole number how many neutrons on average are in atom of osmium?

Anettt [7]

Answer:

jdjdjdhjxjxjchxjxjkxjxjxhxnxkjcjcjcj

Explanation:

sorry i just need point lolllllllllll

7 0

3 years ago

For a particular redox reaction, Cr is oxidized to CrO 2 − 4 and Ag + is reduced to Ag . Complete and balance the equation for t

Sunny_sXe [5.5K]

Answer:

6Ag⁺ + Cr + 8OH⁻ → 6Ag + CrO₄²⁻ + 4H₂O

Explanation:

We can balance the redox reaction of Cr and Ag⁺, in terms of two half-reactions, one for Ag⁺ and other for Cr:

Ag⁺ → Ag

In the above equation we need to balance the number of electrons, we know that the Ag⁺ is being reduced to Ag, so the reaction is:

Ag⁺ + e⁻ → Ag (1)

Now, we need to balance the half-reaction of Cr:

Cr → CrO₄²⁻

From above, we know that the Cr is being oxidated to CrO₄²⁻, so we need to balance the number of electrons and the number of oxygen atoms. The Cr⁰ is being oxidated to Cr⁶⁺, so for the electron balance, we need to add 6e⁻ to the right side of the equation. Since the reaction is in a basic medium, the oxygen atoms will be balanced with OH⁻ ions as follows:

Cr + OH⁻ → CrO₄²⁻ + 6e⁻

The hydrogen atoms will be balanced using H₂O molecules:

Cr + OH⁻ → CrO₄²⁻ + 6e⁻ + H₂O

The balanced equation is:

Cr + 8OH⁻ → CrO₄²⁻ + 6e⁻ + 4H₂O (2)

Since the reaction (1) involves 1 electron and the reaction (2) involves 6 electrons, by increasing the reaction (1) six times and by the addition of the two reactions (1 and 2) we can have the net redox reaction:

6*(Ag⁺ + e⁻ → Ag)

Cr + 8OH⁻ → CrO₄²⁻ + 6e⁻ + 4H₂O

6Ag⁺ + Cr + 8OH⁻ → 6Ag + CrO₄²⁻ + 4H₂O

Therefore, the net equation is: 6Ag⁺ + Cr + 8OH⁻ → 6Ag + CrO₄²⁻ + 4H₂O.

I hope it helps you!

7 0

3 years ago