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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 15454 letters have been answered.



List of most recent 15 letters

Title

Subject

Section

Country

Why is ice used instead of cold water? Matter USA
 
Why does temperature stay the same when boiling? Matter India
 
Why isn't Obama's speech included? Speeches USA
 
Thanks for your informative website Thanks Speaking South Africa
 
Can a graviton escape from a black hole? Astronomy India
 
Where to store sensitive electronic components? Static Electricity USA
 
Does angle change string tension? Sound Australia
 
What happens in evaporation? Matter Ethiopia
 
What will cotton cling to? Static Electricity USA
 
Use of arrow sign in chemical reaction Chemistry India
 
Discuss sociology of education Education Tanzania
 
Determining the audience group Speaking Austalia
 
Wants replacement knobs for 1985 cookware Health USA
 
Suggested mental health resource Mental Health USA
 
Questions on generating elecrticity Physics USA
 

Next 15 letters


Why is ice used instead of cold water?

Matter

May 26, 2016

Question

A doctor advises to use ice pad on forehead to bring fever down instead of using water at 0°C. Why?

ANJANA - USA (27034)

Answer

Ice can be colder than 0 degrees. Also, ice requiers more heat energy to increase its temperature than cold water. Thus, the ice pack would be more effective in cooling the fever.

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Why does temperature stay the same when boiling?

Matter

May 25, 2016

Question

when liquid is heated at its boiling point its temperature remains same. Why?

Vansh - India (27027)

Answer

As you heat the liquid, its temperature rises until it reaches the boiling point. Then the temperature stays the same until all the liquid has changed to a gas. The reason is because the energy used to increase the temperature is spent in changing the state from liquid to gas.

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Why isn't Obama's speech included?

Speeches

May 22, 2016

Question

Why have you left out President Barack Obama from your list of inaugural speech?

Does it smell of revisionist history to you? It does with me.


I LOVE PRESIDENT OBAMA BECAUSE...,,,,

I love President Obama because he and Democrats enacted and implemented the STIMULUS ACT which DEFINITELY helped to rescue the economy from the GREAT RECESSION from falling into a GREAT DEPRESSION.

I love President Obama because he and Democrats' economic policies assisted private employers stop 800,000 Americans from losing their jobs every month to the creation of 14.6 million jobs over 74 straight months of job growth. This is the best record of continuous job growth of any previous U.S. president.

I love President Obama because he took a daring and courageous decision at the start of his presidency; against fierce opposition from REPUBLICANS to BAIL OUT GM and Chrysler. If he had not done so today the Mid-West would have been an industrial waste land with ghost towns. Today, GM and Chrysler are producing more vehicles than ever before.

The production of CARS, TRUCKS and VANS is what began the AMERICAN MIDDLE CLASS and made AMERICA GREAT!

Any president who can turn FAILURE INTO SUCCESS IS A GREAT PRESIDENT!

I love President Obama because he and Democrats have provided over 20 million Americans with affordable healthcare insurance. Americans are living longer but are sicker, too.

I love OBAMACARE; because President Obama CARES for the sick, poor, children and the middle class.

I love President Obama because he is a loving husband and daddy.

Ask Michelle, Malia, Sasha, Mrs Robinson and Bo if that's not true.

STEPHEN PAUL - USA (27021)

Answer

Thank you for your comments and opinions about President Barack Obama. I have planned to include his inaugural address, as well as those from various past Presidents, but have not yet done that. However, Barack Obama's Address before the 2004 Democratic Convention had been included among the other speeches.

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Thanks for your informative website

Thanks

May 19, 2016

Question

Thanks very much for your informative website. It will help me a lot as an aspiring motivational speaker speaker.

Mnikeni - South Africa (27015)

Answer

I am glad that the material was useful to you. Best wishes on your success as a motivational speaker. I am sure that you will inspire your audiences.

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Can a graviton escape from a black hole?

Astronomy

May 19, 2016

Question

Does graviton escape from the black holes? If no then why other celestial objects feels their gravity, if yes then how can graviton escape from the place from where even light cant escape?

Vinamra - India (27017)

Answer

A graviton is a hypothetical particle that is responsible for gravitational forces, as part of the quantum theory of gravitation. Since it is supposed to be the source of gravitational forces through an exchange between masses, it really would not be moving freely like in escaping from a Black Hole.

Other celestial object do feel the gravitational forces from a Black Hole, as witnessed by objects being drawn into the hole. But its forces are reduced as the square of the distance from the Black Hole.

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Where to store sensitive electronic components?

Static Electricity

May 18, 2016

Question

hello

After reading your lesson i realize that i should keep my sensitive electronic components in a ESD safe container. right now i just have a regular plastic compartment bins that i store them in. is that fine?
i also have a cardboard compartment bins that i made is that better?
if both arent good how can i make storage compartment bins that are safe?
thank you so much

mike - USA (27013)

Answer

The biggest problem is in handling the components, if your body had built up static electric charges. This could be from your clothes rubbing on your skin or walking on a rug. That is why many use a grounded wrist strap to prevent charges from affecting the components.

Both type of compartment bins would be fine, although I would lean toward the cardboard, since by rubbing the plastic, you could build up some charges on its surface.

I hope these ideas help. Best wishes in keeping your components safe.

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Does angle change string tension?

Sound

May 17, 2016

Question

Hey in regards to 'Equation for sound created from a string' whit if the string was at a nominated degree to the horizontal, would tension change?

Tom - Australia (27011)

Answer

If the string or wire was very long or made of a heavy material, the tension could vary at different inclination angles. However, it most cases the amount of change would be trivial.

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What happens in evaporation?

Matter

May 17, 2016

Question

evaporation occurs when what happens to an object?

mekdes - Ethiopia (27012)

Answer

When a liquid is heated, some of the material starts to evaporate or turns into the gaseous state of the material.

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What will cotton cling to?

Static Electricity

May 16, 2016

Question

I want to know what soft, pliable material cotton and bamboo cloth will cling to. Will it cling to leather, other cotton or bamboo cloth, polyester, or what? I'm working on a patent pending project and need your help on finding such.
Can a substance be added to cotton and bamboo cloth to make it cling statically to a soft, pliable material?
Your help will be gratefully appreciated.

Horacio - USA (27007)

Answer

Although cotton is fairly neutral, it can be made to cling to some materials. Polyester and leather both attract materials, but in opposite charges. It is a good idea to experiment with the different materials.
See: Effect of Materials on Static Electricity for a listing.

Best wishes for success in your project.

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Use of arrow sign in chemical reaction

Chemistry

May 16, 2016

Question

Some of the chemical reactions are represented by arrow sign and some are by equal sign. What is the difference between this two types?

Kind Regards,

Mohammad - India (27008)

Answer

If the chemical reaction mainly goes in one direction, it is represented by an arrow to indication the direction. For example C + O2 --> CO2.

Some reactions can readily go in both directions and are represented by a double arrow ( <---> ) or an equals sign.

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Discuss sociology of education

Education

May 16, 2016

Question

question.
Discuss some research things in the sociology of education

mary - Tanzania (27010)

Answer

You can see Education Resources for a good list. However, there isn't much on the sociology of education.

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Determining the audience group

Speaking

May 15, 2016

Question

How would you determine the audience group and presentation for a one-page desktop publication?

Myla - Austalia (27005)

Answer

I'm not sure if you are asking about speaking to a group or publishing something.

When speaking to a group, the announcement of the subject of your presentation usually will attract interested people. However, if the group is mixed, it is good to talk to people beforehand to get an idea of their interests.

Determining the audience for a publication is more difficult. If it is Internet-based, interested people will usually find it through a search. If the presentation is for desktop use, you need to determine how they will find out about it.

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Wants replacement knobs for 1985 cookware

Health

May 12, 2016

Question

I purchased a set of Society cookware for my daughter when she graduated from high school in 1985. the knobs on the lids broke.I need to know if I can purchase replace knobs.

Barbara - USA (26995)

Answer

Check the website. They have a link to replacement parts.

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Suggested mental health resource

Mental Health

May 12, 2016

Question

Good Morning

I was looking through directories that have information regarding addiction, treatment, and / or substance abuse when I came across your links page. I like that you include descriptions with each link, very thorough.

I'm emailing you because I work for https://detoxtorehab.com as a writer and part of the outreach team. Detox to Rehab is filled with content about individual substances, the effects of their addiction, and the withdrawal symptoms. We also have information with regards to interventions, treatment, therapy, and rehab centers, as well as video blogs interviewing therapists and recovering addicts who wish to share their experiences.

It would be fantastic if you would consider including a link to Detox to Rehab in your resources list for your viewers.

Either way, have a blessed and bright day!

With regards,

Benjamin - USA (26999)

Answer

Thanks for the suggested resource. I added a link on Mental Health Resources > Addiction > Recovery.

Best wishes in your activities.

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Questions on generating elecrticity

Physics

May 5, 2016

Question

I have asked many questions in many sites like stackexchange.com, MadSci Network, Socrates, Wikipedia Reference Desk to get the basics of Electricity but everyone said "you need an physics tutor cause you don't know the basics'. I tried downloading more than 20 books regarding electricity from internet archive to get an intuitive world of electricity but still I'm stuck. To be honest everyone says "voltage is transfered through the wire not electrons in AC" but what's really voltage? How do we reverse the direction of current in AC or DC generator? Many more questions like how commutator reverses the direction of current. There's many other questions but I don't know how to build a foundation for electricity. Could you help me.

Justin - USA (26980)

Answer

You can see a how voltage and current compare to the water in a hose in Direct Current (DC) Electricity. Voltage is like water pressure. It is the potential energy causing the electrons to move.

Movement of wire through a magnetic field creates a electric current in the wire, according to the direction of motion. In a generator, a commutator is a clever device that that cause the current to reverse in the wire.

I plan to have many more basics of electricity articles in the near future. Best wishes for success in your studies.

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