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Advanced tools can be created from scratch using a powerful custom tool framework.

These are XML files describing the list of points, lines, angles and how the tool should behave when the user interacts with it.

Many of the more advanced tools found in Kinovea like the bike-fit, archery or human model tools are actually custom tools that you can copy and modify to suit your needs.

Custom tools can have tracked points, computed points, distances and angles measurements, visibility menus, styling and colors and other goodies.

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Advanced tools can be created from scratch using a powerful custom tool framework. These are XML files describing the list of points, lines, angles and how the tool should behave when the user interacts with it.

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Blogger.com - Create a unique and beautiful blog easily.

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Publish your passions your way. Whether you'd like to share your knowledge, experiences or the latest news, create a unique and beautiful blog.

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Presentations and videos with engaging visuals for hybrid teams | Prezi Present

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Create attention-grabbing presentations in minutes with the Prezi AI presentation maker. Discover more and get started today.

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Join a game of kahoot here. Kahoot! is a free game-based learning platform that makes it fun to learn – any subject, in any language, on any device, for all ages!

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The evidence is in the practice

ESSA Level 3 correlation evidence in math and ELA, earned by teachers running frequent formative assessments.

When teachers run 30+ formative questions a week, the research is clear: they get more data-driven, their students get more engaged. Wayground is built to make that practice enjoyable ot run, attainable to fit a class period, and habitual enough to last past September.

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Quizizz is now Wayground | Teacher AI and Resources

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Find standards-aligned resources that engage every student. Wayground (formerly Quizizz) helps teachers differentiate instruction with AI and track student progress.

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LinkedIn Learning: Online Courses for Creative, Technology, Business Skills

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Learn business, creative, and technology skills to achieve your personal and professional goals. Join LinkedIn Learning today to get access to thousands of courses.

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Microsoft Learn for Educators Program - Applied Skills

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We acknowledges the Traditional Custodians of Country throughout Australia and recognises the continuing connection to lands, waters and communities. We pay our respect to Aboriginal and Torres Strait Islander cultures and to Elders both past and present.

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Build healthy habits with the all-in-one food, exercise, and calorie tracker.
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Nutrition tracking works, here's the proof

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Our Philosophy

Knowledge is power

"Studies show people who keep a food diary are more likely to hit their goals. MyFitnessPal simplifies nutrition and calorie tracking, provides the data you want, and helps you make sense of it all.

Healthy eating is a continuous journey of self-discovery. And the more you track, the more empowered you'll become to make healthy choices that support your goals."

MyFitnessPal Registered Dietitian

As seen in...

From our experts

Essential Guide to Food Logging
Whether your goal is to lose weight, build strength, perform at your peak or improve your overall health, keeping an accurate food journal of what you eat and drink is essential. It provides valuable insight into your nutrition habits, so you can see trends and make adjustments as needed.
Read more on MyFitnessPal blog ›

Essential Guide to Healthy Eating
When you start learning more about nutrition, it can seem overwhelming. For people who are interested, there is definitely a lot to learn and explore, but, in the end, basic nutrition is quite simple. It's so simple, in fact, that we know you can eat better by focusing on these eight things.
Read more on MyFitnessPal blog ›

About MyFitnessPal

MyFitnessPal is one of the best weight loss apps and fitness apps, helping nearly 1 million members reach their nutrition and fitness goals every year. Members use it as a calories tracker and calorie counter to log their foods, and take advantage of the app's food database that contains over 18 million foods. It's not just a free calorie counter app - it's also the best calorie counter app for people who are looking to take back control of their health and fitness.

3.7 Million
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Hit your health goals in 1-2-3

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Now you have the tools and knowledge to build healthy habits for life.

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Calorie Tracker & BMR Calculator to Reach Your Goals | MyFitnessPal

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Reach your health, fitness & weight goals with MyFitnessPal, the #1 nutrition tracking app. Macro & calorie calculator, food tracker, and fasting app in one. Download today!

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Interactive science lessons based on real-world issues. The benefits of your favourite science textbook, workbook, videos, simulations, and assessments combined into a seamless teaching and learning experience.

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Open Canvas

Create, organize, and move freely on an open canvas. Create seamless presentations without the restrictions of linear slides.

Ready-made asset libraries

Choose from millions of images, stickers, GIFs, and icons from Unsplash and Giphy.

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Presentations and videos with engaging visuals for hybrid teams | Prezi Present

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Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.

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Stay safe online with info, resources and advice for students and parents.

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Chemix is a free online editor for drawing lab diagrams. Simple and intuitive, it is designed for students and pupils to help them draw diagrams of common laboratory equipment and lab setup of science experiments.

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Science Diagram Maker | Scientific Drawing Software | EdrawMax Online

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Create beautiful and accurate science illustrations in minutes with EdrawMax’s science diagram maker. Massive built-in templates for teachers and students.

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Instructions on balancing chemical equations:

Enter an equation of a chemical reaction and click 'Balance'. The answer will appear below

Always use the upper case for the first character in the element name and the lower case for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide

To enter an electron into a chemical equation use {-} or e

To enter an ion, specify charge after the compound in curly brackets: {+3} or {3+} or {3}.
Example: Fe{3+} + I{-} = Fe{2+} + I2

Substitute immutable groups in chemical compounds to avoid ambiguity.
For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced,
but PhC2H5 + O2 = PhOH + CO2 + H2O will

Compound states [like (s) (aq) or (g)] are not required.

If you do not know what products are, enter reagents only and click 'Balance'. In many cases a complete equation will be suggested.

Reaction stoichiometry could be computed for a balanced equation. Enter either the number of moles or weight for one of the compounds to compute the rest.

Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents. The limiting reagent row will be highlighted in pink.

Examples of complete chemical equations to balance:

Examples of the chemical equations reagents (a complete equation will be suggested):

Understanding chemical equations

A chemical equation represents a chemical reaction. It shows the reactants (substances that start a reaction) and products (substances formed by the reaction). For example, in the reaction of hydrogen (H₂) with oxygen (O₂) to form water (H₂O), the chemical equation is:

However, this equation isn't balanced because the number of atoms for each element is not the same on both sides of the equation. A balanced equation obeys the Law of Conservation of Mass, which states that matter is neither created nor destroyed in a chemical reaction.

Balancing with inspection or trial and error method

This is the most straightforward method. It involves looking at the equation and adjusting the coefficients to get the same number of each type of atom on both sides of the equation.

Best for: Simple equations with a small number of atoms.

Process: Start with the most complex molecule or the one with the most elements, and adjust the coefficients of the reactants and products until the equation is balanced.
Example:

1. Count the number of H and O atoms on both sides. There are 2 H atoms on the left and 2 H atom on the right. There are 2 O atoms on the left and 1 O atom on the right.

2. Balance the oxygen atoms by placing a coefficient of 2 in front of H₂O:

3. Now, there are 4 H atoms on the right side, so we adjust the left side to match:

4. Check the balance. Now, both sides have 4 H atoms and 2 O atoms. The equation is balanced.

Balancing with algebraic method

This method uses algebraic equations to find the correct coefficients. Each molecule's coefficient is represented by a variable (like x, y, z), and a series of equations are set up based on the number of each type of atom.

Best for: Equations that are more complex and not easily balanced by inspection.

Process: Assign variables to each coefficient, write equations for each element, and then solve the system of equations to find the values of the variables.
Example:

1. Assign variables to coefficients:

2. Write down equations based on atom conservation:

3. Assign one of the coefficients to 1 and solve the system.

4. Adjust coefficient to make sure all of them are integers. b = 3.5 so we need to multiple all coefficient by 2 to arrive at the balanced equation with integer coefficients:

Balancing with oxidation number method

Useful for redox reactions, this method involves balancing the equation based on the change in oxidation numbers.

Best For: Redox reactions where electron transfer occurs.

Process: identify the oxidation numbers, determine the changes in oxidation state, balance the atoms that change their oxidation state, and then balance the remaining atoms and charges.
Example:

1. Assign oxidation numbers:

Calcium (Ca) has an oxidation number of 0 in its elemental form.

Phosphorus (P) also has an oxidation number of 0 in its elemental form.

In Ca₃P₂, calcium has an oxidation number of +2, and phosphorus has an oxidation number of -3.

2. Identify the changes in oxidation numbers:

Calcium goes from 0 to +2, losing 2 electrons (reduction).

Phosphorus goes from 0 to -3, gaining 3 electrons (oxidation).

3. Balance the changes using electrons: Multiply the number of calcium atoms by 3 and the number of phosphorus atoms by 2.

4. Write the balanced Equation:

Balancing with ion-electron half-reaction method

This method separates the reaction into two half-reactions - one for oxidation and one for reduction. Each half-reaction is balanced separately and then combined.

Best for: complex redox reactions, especially in acidic or basic solutions.

Process: split the reaction into two half-reactions, balance the atoms and charges in each half-reaction, and then combine the half-reactions, ensuring that electrons are balanced.
Example:

1. Write down and balance half reactions:

2. Combine half reactions to balance electrons. To accomplish that we multiple the second half reaction by 2 and add it to the first one:

3. Cancel out electrons on both sides and add NO₃{-} ions. H{+} with NO₃{-} makes HNO₃ and Cu{2+} with NO₃{-} makes Cu(NO₃)₃:

Learn to balance chemical equations:

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Balance Chemical Equation - Online Balancer

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Balance Chemical Equation - Online Balancer