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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 15862 letters have been answered. They are listed according to date.

You can read them to further your understanding of the subjects.



List of most recent 15 letters

Title

Subject

Section

Country

What is sound? Physics Sound USA
 
Insulating room with plastic water bottles Sound Thailand
 
Thanks so much for the post Thanks USA
 
How is magnetic field created? Physics Magnetism India
 
What is a solid, liquid and gas? Physics Matter India
 
Customer spreading false rumors Business USA
 
Electric charges and protons Physics Static Electricity USA
 
What is gravitational acceleration? Gravitation Pakistan
 
Multiply terms with different base Algebra USA
 
Ultra Craft waterless cookware handles Health USA
 
Using a USA Sony in the UK Electricity UK
 
How can you change the speed? Physics Force USA
 
Azeotropic Mixture Chemistry Nigeria
 
Suggested resources Web Design Sweden
 
Breaking mass in parts Physics Gravitation Tanzania
 

Next 15 letters

 





What is sound?

Physics

November 14, 2017

Question

I like sound. oh and i like waves yeah I like waves. but what is sound?

Denry - USA (28320)

Answer

Sound consists of regular vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.

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Insulating room with plastic water bottles

Sound

November 10, 2017

Question

I live in a remote northern Thailand village. Access to manufactured goods are hundreds of kilometers away. We have abundant plastic water bottles, corrugated tin and bamboo. Is there any way that these meager possessions can sound insulate our community room from the teenage boomboxes. I considered gluing the plastic bottles to the corrugated metal 2 deep and then lining the outside with bamboo strips to avoid the ugles....Am I wasting my time? Thanks, michael, volunteer.

michael - Thailand (28316)

Answer

I think your idea to insulate the community room walls with the plastic bottles and corrugated metal would probably work and reduce the sound to a degree.

Before you insulate the whole room, it might be worthwhile to make a box with the materials to enclose a boombox, just to see how much the noise is reduced.

Best wishes with your efforts. Let me know how things work out.

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Thanks so much for the post

Thanks

November 8, 2017

Question

Thanks so much for the post on character. Really Great.

J - USA (28314)

Answer

I'm glad the information was useful to you.

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How is magnetic field created?

Physics

November 7, 2017

Question

how megnetic field created around electric current

ravi - India (28312)

Answer

Electrical charges have an electric field around them. When the charges move a magnetic field is created perpendicular to that movement. An electric current consists of moving electrical charges.

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What is a solid, liquid and gas?

Physics

November 7, 2017

Question

Q1. What is solid, liquids, gas

MD - India (28313)

Answer

See States of Matter for an explanation.

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Customer spreading false rumors

Business

November 6, 2017

Question

We had a customer accuse of of fraud for selling her a setting made of platinum because it was attracted to her rare earth magnet. I understand that jewelry is not our platinum, but considered pure with 950/50 ratio. I understand cobalt is often used as the 50. I understand cobalt is magnetic. I also understand that platinum is paramagnetic; which means it is a weak magnet.

Even if there was no Cobalt, is it possible if the rare earth magnet was strong enough it would attract the platinum? There are many websites stating that if it is attracted to a magnet. It is not platinum. The hurt the entire jewelry industry. Jewelers and pawn shops are misinformed because if these sites. They misinform customers.

I need some help in getting the truth out. We used, Stuller, a Billion dollar company as our supplier and showed her the invoice. We even paid $150 to have the setting independently appraised by a certified GIA gemologist. She would not accept those pieces if evidence and is calling us frauds, ruining our business. I need help in stopping the false info on the net that hurts our industry.

I hope you can help me with data on this. Thank you in advance.

Kim - USA (28310)

Answer

It is unfortunate that some people are complete jerks, and not only will not accept solid information that disputes some belief those people have, but they are also so nasty that they try to ruin another person's business.

The problem is that it is so easy to spread false statements through Social Media, and that there are people who will believe anything they see.

One thing you could do concerning this nasty customer is to offer to buy back the setting. It might be worth taking the loss than having such a person spreading false information about you and your business.

It is unlikely that any platinum used in jewelry is 100% pure. Also, since is it paramagnetic, it is slight attracted to a strong rare earth magnet. But of course, this will not convince some people.

I guess you--as well as many business people dealing with the public--have to be careful and spell things out before making a sale.

Best wishes for handling such problems in your business.

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Electric charges and protons

Physics

November 6, 2017

Question

I was taking a Science quiz and I googled the question and your website came up. I read it and I got the question wrong. It said "electrical charges" it is actually Protons. Just in case if you want to update that. Thanks, just thought you need to know. :)

Mika - USA (28311)

Answer

Thanks for the feedback. A proton is not an electrical charge. Instead, it is a subatomic particle that HAS a positive (+) electric charge. Likewise, an electron is a particle that has a negative (-) charged particle.

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What is gravitational acceleration?

Gravitation

November 4, 2017

Question

what is gravitational acceleration

muhammd - Pakistan (28308)

Answer

Gravitational acceleration is the acceleration or speeding up of an object caused by the force of gravitation. This usually concerns large objects in space.

It is different than the acceleration due to gravity, which is for normal sized objects close to Earth.

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Multiply terms with different base

Algebra

November 3, 2017

Question

I need to find out how to multiply terms with different base and exponents but i looked online and nothing shows up something like this. XY* in a radical multiplied by x*y to the third power inside a radical. Please help it feels hopeless right now

Lester - USA (28307)

Answer

I'm not sure I understand what you are trying to do. Are you trying to multiply something like (2^3)(5^2)?

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Ultra Craft waterless cookware handles

Health

November 2, 2017

Question

Do you know where or what company took over Ultra Craft waterless cookware? I need some replacement handles. Thank you

Joleta - USA (28306)

Answer

You might try Regal Ware or Kitchen Craft, since they bought out many cookware companies. Otherwise, you can try some repair shop to get generic handles that may fit.

I hope that helps.

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Using a USA Sony in the UK

Electricity

November 1, 2017

Question

Hi guys,

I have a USA 4k tv (Sony xbr-65x900c) that is dual frequency which I am now using in the UK. I have it stepped down at the moment due to the 2 pin power cord plug fitting but was wondering if I should change to a uk plug.

Curently, I assume I now have a 120v but at 50hz running to the TV.
Is the TV effectively converting the frequency it needs ?
Would it be better for the tv if I just change the plug to a uk type ?


Brgds
David

David - UK (28304)

Answer

I'm really not sure. The best bet would be to check with an electrician or a Sony dealership in the UK.

Best wishes on solving your problem.

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How can you change the speed?

Physics

October 31, 2017

Question

What are some ways you can. Change the speed

Tjey - USA (28303)

Answer

When you apply a force that pushes or pulls on an object its speed or velocity changes, provided that force can overcome friction.

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Azeotropic Mixture

Chemistry

October 27, 2017

Question

Whats Azeotropic Mixture

Saviour - Nigeria (28301)

Answer

An Azeotropic Mixture is known as a constant boiling point mixture. That means the mixture cannot be separated by boiling or distillation. An example of such a mixture is 5% water and 95% ethanol.

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Suggested resources

Web Design

October 19, 2017

Question

Hi Ron,
Hope you're enjoying your day :-). My name is Robert and earlier this morning I stumbled on your helpful resource page, here: school-for-champions.com/fiction/resources.htm

While you've listed some awesome resources for your readers, I noticed that you haven't mentioned Website Builders, which are perfect DIY website/blog building and also marketing tools for writers, small business owners, bloggers, freelancers, creatives...

I am web developer/designer and I often get questions about website builders. Thus, I decided to test out 10 most popular website builders.

I conducted several tests (reliability, usability etc..). Anyways, here's my 'case-study': websitesetup.org/website-builders/

If you have some free time, take a look at it. If you find it useful/helpful to your readers - don't hesitate to mention it on your page and help your visitors to get know and choose the best website builder.

As web presence is important then it might make a nice and useful addition on your page.

Thanks and let me know if you've any questions/concerns,
Robert

Robert - Sweden (28293)

Answer

Thanks for the kind words.

I added a link to your "Best Website Builders" page at < href="http://www.school-for-champions.com/web/resources.htm">Web Design Resources and "33 Ways to Monetize a Website (or a Blog)" at eCommerce Resources.

Best wishes for success in your business.

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Breaking mass in parts

Physics

October 18, 2017

Question

a mass M is broken into two parts "m" and (M-m) related so that of gravitational between the two parts is maximum??

erickson - Tanzania (28292)

Answer

The force is proportional to m(M-m) or (mM - m^2).

If you try values of m = 0.1M, m = 0.2M, m = 0.3M, m = 0.5M, m = 0.6M and so on, you will find that the maximum value of m(M-m) is at m = 0.5M. In other words, the maximum gravitational force is when both pieces are the same size.

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