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Home › 2012 › September

Month: September 2012

Adding Vectors: The “chart thing”

By Jack Posted on September 27, 2012 Posted in physics No Comments

Especially when tutoring physics 12, vector addition comes up.  Let’s use the “chart thing”: I took Physics 12 in 1988.  In that class, we added vectors component-wise.  However, at university they used sine law and cosine law.  I haven’t seen someone …

Adding Vectors: The “chart thing” Read more »

Inequalities: Phone Plans

By Jack Posted on September 20, 2012 Posted in math No Comments

Which phone plan to choose?  A little math tutoring can help you decide. Let’s assume we have two choices: Plan A $12 per month $0.10 per text Plan B $18 per month $0.07 per text How do you decide which plan …

Inequalities: Phone Plans Read more »

Tagged with: how to find if one phone plan is better, rules about inequalities, when to flip the sign of an inequality

Dependent Variable, Independent Variable, Test and Control

By Jack Posted on September 19, 2012 Posted in biology_12, nursing No Comments

When tutoring Biology 12, terms involved in the scientific method need definition.  Let’s look at some. In an experiment, there is one variable whose value you must wait to see, and (at least) one that you purposely set.  The variable you …

Dependent Variable, Independent Variable, Test and Control Read more »

Neutrons and Isotopes

By Jack Posted on September 19, 2012 Posted in chemistry, sciences No Comments

Tutoring high school chemistry, isotopes are an early topic.  Let’s have a look…. From basic atomic structure, we know that an atom’s mass comes from its number of protons plus its number of neutrons.  Take fluorine, for example:  its mass is 19.  It’s …

Neutrons and Isotopes Read more »

Metric System: decimal places and -re

By Jack Posted on September 17, 2012 Posted in math, sciences No Comments

When you tutor sciences, you’re immersed in the metric system.  Let’s talk a bit about it. The metric system uses multiples of 10.  Therefore, to convert from any metric unit to any other one, you just need to move the decimal point;  you needn’t …

Metric System: decimal places and -re Read more »

Chlamydia and Gonorrhea: infertility risks

By Jack Posted on September 16, 2012 Posted in biology_12, nursing No Comments

Most people have probably heard of chlamydia and gonorrhea.  They are both bacterial STDs.  Since neither is life-threatening (as far as I’ve ever heard), they don’t get as much attention as AIDS or syphilis. A risk with both chlamydia and gonorrhea …

Chlamydia and Gonorrhea: infertility risks Read more »

Homeostasis, negative feedback, and thyroxin

By Jack Posted on September 14, 2012 Posted in biology_12, nursing No Comments

Tutoring biology, the concept of negative feedback is important to explain.  Negative feedback is used by all organisms to maintain their living state.  You also use it while driving your car. More or less, the body needs all its processes to …

Homeostasis, negative feedback, and thyroxin Read more »

Cell efficiency

By Jack Posted on September 14, 2012 Posted in biology_12, nursing No Comments

When you tutor Biology 12, one topic that comes up is cell efficiency.  It’s a bit tricky for some people, because it involves some math. Putting it simply, imagine a cell is a sphere.  Its volume is what it needs …

Cell efficiency Read more »

Conservation of momentum

By Jack Posted on September 13, 2012 Posted in physics No Comments

Every year, the physics tutor fields a few questions on conservation of momentum.  It’s an interesting phenomenon because you can use it to explain some familiar, everyday situations. Momentum is mass times velocity.  Something that is 50 kg, traveling at …

Conservation of momentum Read more »

Does 0.33333….. really equal 1/3?

By Jack Posted on September 10, 2012 Posted in math No Comments

Hello.  What rain yesterday, here in Campbell River!  Well, we sure needed it.  It’s nice to have more seasonal temperatures after the oven that was last week. A math tutor often encounters the topic of converting decimals to fractions.  Terminating …

Does 0.33333….. really equal 1/3? Read more »

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