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Each day readers send in questions and feedback concerning the various lessons in the School for Champions website. A total of 15544 letters have been answered.



List of most recent 15 letters

Title

Subject

Section

Country

Using European washer-dryer in the U.S. Electricity USA
 
Electron microscope Electricity india
 
Are acids useful? Tests Lesotho
 
About Nitrogen Chemistry Philippines
 
Where did naming conventions come from? Algebra Australia
 
Purpose of a beauty pageant competition Competition USA
 
Dry ice in a metal container Matter Canada
 
Suggested resource Nutrition USA
 
Place of publication? School for Champions Philippines
 
How to wire a three pin plug Electricity USA
 
Wants to pass the fifth grade Grades USA
 
Using Sharp digital clock in India Electricity India
 
Rolling cam up a plastice ramp Friction India
 
You are incredible! Thanks USA
 
You made some good points Thanks USA
 

Next 15 letters


Using European washer-dryer in the U.S.

Electricity

August 25, 2016

Question

I wonder if a European washer dryer combo -in one machine-would work in the us since the frequency is lower. If it does work is there wear and tear on the electrical system of the machine?

Monika - USA (27232)

Answer

Provided the voltage requirement is the same, the European washer-dryer should work. Otherwise, you would have to use a voltage adapter.

Since US frequency is higher, the machine may run slightly faster. However, it is good to check with the manufacturer if the machine would work well in the U.S.

I hope that helps.

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Electron microscope

Electricity

August 23, 2016

Question

In ac current electron microscopy oscilate about their mean positions then how charge follow one end to another end of conductor please explain it with diagram

subhash - india (27230)

Answer

The way an electron microscope works is that AC current is used to heat an electron gun, which emits electrons. A positive (+) charged anode is used to attract and focus the negative (-) charged electrons.

As far as I know, AC cannot be used to oscillate electrons between the electron gun and its target.

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Are acids useful?

Tests

August 16, 2016

Question

Are acids useful

Mamello - Lesotho (27215)

Answer

Acids are very useful and even necessary. See Acids for some examples.

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About Nitrogen

Chemistry

August 11, 2016

Question

Nitrogen physical properties,origin,characteristics and uses?

Noel - Philippines (27203)

Answer

Read Nitrogen and Uses for Nitrogen.

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Where did naming conventions come from?

Algebra

August 9, 2016

Question

Ron - from this abc usually constants and xyz variables, but any idea why linear algebra use ith and jth for row and column and then refers to a 2x3 matrix as an mxn matrix. Was wondering if ijkmn arent used so much - or could it be m for myrian and n for numberth nth - even non maths people know what to the nth degreee means? But I is often used for interest as is r for rate. K is most often a specific constant. n I can understand to the last n number but m has me stuck - unless it is like a-z m to n?

TIMOTHY - Australia (27199)

Answer

That is a puzzler. I haven't been able to find where the conventions for naming constants, variables, table rows and columns, and nth degree come from.

There must be some rationale hidden in the archives of mathematical history.

If you ever find out, let me know.

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Purpose of a beauty pageant competition

Competition

August 9, 2016

Question

Beauty with a purpose pageant competition.

- USA (27201)

Answer

In a beauty pageant, contestants are judged on their looks, personality, and talent. This is a form of Performance Competition, where a judge decides who is best and the contestants cannot affect the performance of the others.

Just as a competition to see who can run the fastest, the purpose of a beauty pageant is simply to see who wins under their criteria.

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Dry ice in a metal container

Matter

August 7, 2016

Question

if u put dry ice in a metal tank and closed it up and put the tank in hot water .will it create presure in the tank. thanks

donald - Canada (27195)

Answer

When dry ice melts, it gives off carbon dioxide gas (CO2). The gas expands and will create pressure inside a closed container.

It is not a good idea putting the dry ice in a metal tanks and heating it, because it could easily cause the tank to burst. It could be quite dangerous.

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Suggested resource

Nutrition

August 7, 2016

Question

Hi Ron, my name is Pete and I was referred to this resource page by Mike at nutritionsecrets.com, who's a peer of mine.

I run a personal health & fitness blog called straightforwardfatloss.com, the main goal of which is to show people, as substantiated by legitimate science, how to lose weight and get healthy as easily as possible. I have a number of how-to articles, as well as articles discussion common practical hurdles, like how to handle going out to restaurants, family dinners, etc.

With so much confusing misinformation out there, among many other problems, a lot of normal people out there falsely believe health is inaccessible to them, and my goal is to show them that it's not.

Anyway, I noticed at the bottom of your resource page that you're open to suggested additions, so I thought I'd email to say hello and suggest my site. If you think it would be a useful referral to your readers, I'd of course appreciate a link.

Thanks for your time,

Pete - USA (27196)

Answer

Thanks for the comments. I added a link to your blog at Nutrition Resources.

Best wishes for success in your activities.

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Place of publication?

School for Champions

August 6, 2016

Question

What's the place of publication? Please ?? Thanks

Kristia - Philippines (27192)

Answer

The School for Champions is based in Lake Oswego, Oregon, USA

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How to wire a three pin plug

Electricity

August 6, 2016

Question

describe how to wire a three pin plug

simphiwe - USA (27193)

Answer

There are several sources on how to wire a three pin plug:

How do you wire a three-pin plug?

How to wire 3 pin plug - YouTube

The Three pin plug - pictures

I hope that helps.

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Wants to pass the fifth grade

Grades

August 6, 2016

Question

HI I just wanted to know how can i pass the fifth grade how do i get A in class please,

serge - USA (27194)

Answer

The fact that you want to do well in school is the first big step. Set yourself a goal of passing and even getting an A in class. Writing that down so you can look at it is a good idea.

Paying attention in class and when you do your homework is important, especially with all the distractions of smart phones and texting. Set aside a time to do your homework with no distractions.

To get good grades, it is important to Be Good At Taking Tests.

finally, you might ask your teacher for tips on getting better grades in class. Often they can help.

Best wishes on becoming a top student. I know you have what it takes to succeed.

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Using Sharp digital clock in India

Electricity

August 4, 2016

Question

I purchased a digital alarm clock (sharp) from USA with AC120v 60 HZ10w made in china.I want to use it in India at Bangalore. Please advise which converter I should buy in order to use the clock in india.

sundararajan - India (27189)

Answer

You can check Sharp USA Support to try to find the information on your clock.

If you need a converter, I think that purchasing one would cost more than it would be worth it.

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Rolling cam up a plastice ramp

Friction

August 3, 2016

Question

Hi... i wanted to know what exactly is the change when we go from sliding motion to rolling motion?
what can be the changes in a situation when a metal piece is sliding and climbs up a ramp is changed by a roller which climbs up the ramp?
The ramp is plastic and climbing cam is of metal..
is there any thumb rule?
Please guide me..

Ameya - India (27185)

Answer

When you apply a torque on a wheel or push the wheel, it may slide before it starts to roll. See Role of Friction in Starting Rolling Motion.

Rolling a wheel or cam up an incline is affected by the weight, coefficient of rolling friction, and angle. See: Rolling Friction for the equation.

You can find an approximate coefficient of friction for the two materials at: Coefficient of Friction Values for Clean Surfaces.

I hope that helps.

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You are incredible!

Thanks

August 3, 2016

Question

I was suggested this blog by my cousin. I am not sure whether this post is written by him as no one else know such detailed about my problem. You are incredible! Thanks!

huba - USA (27187)

Answer

I appreciate your comments. I am glad the material is helpful to you. Most information comes from research.

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You made some good points

Thanks

August 3, 2016

Question

There is visibly a bundle to realize about this. I feel you made some good points in features also.

pron - USA (27188)

Answer

Thanks for your comments. Yes, all the information can be overwhelming.

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