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Feedback Blog

Each day readers send in questions and feedback concerning the various lessons in the School for Champions website. A total of 15324 letters have been answered.



List of most recent 15 letters

Title

Subject

Section

Country

How do animals compete for food? Competition USA
 
Thinks gravity causes friction Physics Friction India
 
Melting and boiling points of materials Physics Matter USA
 
Upstairs neighbor making noise on the floor Physics Sound USA
 
Breast cancer resource Health USA
 
How to get the attention of the audience? Speaking Morocco
 
Permission to use reference SfC USA
 
Correction in formula Chemistry USA
 
Problems with flyaway hair Physics Static Electricity USA
 
Methods of discharging electroscope Physics Static Electricity Zambia
 
What is Electromagnetism? Physics Zambia
 
How can I be a pro in handball? Sports Australia
 
Cancelling low frequency whispers Physics Sound USA
 
Thinking of Big Bang Theory Physics Matter Australia
 
Why is homework important after math lesson? Grades Zimbabwe
 

Next 15 letters


How do animals compete for food?

Competition

February 8, 2016

Question

How do they compete # examples and why do they compete besides the fact that they just have those instincts.

Azeem - USA (26763)

Answer

It is natural for animals to want to get food to eat. When two animals want to get the same item of food, they get into competition for that food.

Sometimes, the first one to see the food will grab it and run or fly away. A flock of crows may see some food, but the first one to get there will grab it and fly away. He won the competition.

Other times they might fight for the food. Dogs are known to compete for food by fighting.

Some animals--such as chimpanzees--can actually trick the other into getting the food.

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Thinks gravity causes friction

Physics

February 2, 2016

Question

the main causes of friction is gravity present in earth. And i have full explanation of it but you should believe on me.

Abhishek - India (26741)

Answer

There is friction when you slide an object along the ground of other surface. The Earth's gravity causes the object to have weight and pulls it toward the other surface. The sliding of the surfaces results in the friction.

Gravity does not cause the friction but contributes to the effect. The friction in the brakes of a car have nothing to do with gravity.

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Melting and boiling points of materials

Physics

January 30, 2016

Question

Hello! My name is Connor Feckett. I am a student at the School of Applied Research in Land O Lakes. I am currently working on a project about the changes in matter and using the scientific method. This project will include researching the different states of matter, kinetic theory of matter, melting and boiling points, as well as using the scientific method to predict if adding things to water may change its melting or boiling points. I am wondering if you could help direct me where to find the melting and boiling points of at least 5 different things. I appreciate your time. Thank you.

- USA (26732)

Answer

See Melting and Boiling Points of Common Materials for a comprehensive list.

Best wishes for success in your project.

PS: I'm originally from Wisconsin.

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Upstairs neighbor making noise on the floor

Physics

January 29, 2016

Question

Hi,
I am looking for something that picks up sounds say through a ceiling. I have a very noisy neighbor and they drag furniture and drop things hard on the floor etc and I want to either record this or have it show on some sort of graph etc or both. Can you advise me on what type of device is the best for doing this? If so and know a link ,please send it to me. Anything will be greatly appreciated. I will use this to show the police,land lord and hosing authority on what is going on day after day after day.... Any info will help. Thank you.

Lorenz
Bmx4851@yahoo.com

Lorenz - USA (26729)

Answer

It can be very annoying when the neighbor above your place makes noises on the floor. I've had the same experience.

The police do not care to get involved, since the people aren't breaking any laws.

A good thing to do is to talk to the people upstairs and politely ask them to try to make less noise on the floor. They might then be more careful. If that doesn't work, you could talk to the landlord, but that may not do much good.

Recording the noise can be done with any digital recorder or tape recorder, but I think most people would take your word for the fact that it is annoying or bothersome.

Best wishes in solving your problem. In my case, I was glad when the people moved away.

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Breast cancer resource

Health

January 29, 2016

Question

I was just cruising through your list of breast cancer resources, and wanted to know if you would like to include Healthline? We have over 200 clinical, informational, and lifestyle articles that will give your readers a comprehensive overview of the condition. You can see our breast cancer topic center here: "http://www.healthline.com/health/breast-cancer".

Healthline.com is the fastest growing health information website, with over 40 million monthly users. All of our content goes through a rigorous editorial process and medical review, so you can ensure our topic center will be of the upmost standards. You can read more about us here: "http://www.healthline.com/health/about-us".

Thanks for the consideration, looking forward to hearing from you soon!

Kind Regards,

Cindy - USA (26730)

Answer

Thanks for the resource. I added a link to your site at Health Resources

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How to get the attention of the audience?

Speaking

January 29, 2016

Question

..please could you help me with these tow questions:

1_what should you do to get your audience attention to your speech?

2_What are the main parts of presenting a speech?

I need the answers as soon as possible.Because I will be asked about them on the day of the exam 05/02/2016 and thank you in advance.

Ahmad - Morocco (26731)

Answer

After you have been introduced and are standing in front of your audience, it is good to pause and wait for them to get settled. If you don't say anything right away, it will cause them to give you attention.

Then you need to get their interest. One good way is to ask them a question that relates to your subject. For example: "Let me ask you a question. How many of you have ever XXX?"

Another way to get their interest is to make a statement related to your subject that arouses their curiosity.

The main parts of a speech are the opening, where you get their attention and interest and then tell what you will be speaking about.

Then the body of the speech is where you explain your subject, usually in three parts.

Then in your conclusion, you summarize the points you have made.

Best wishes for success in your speaking and in your exam.

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Permission to use reference

SfC

January 28, 2016

Question

Mr. Kurtus,

I am going to Northwest Nazarene University pursuing a Master's Degree in Education. May I have your permission to use one of your generic surveys for my final research project? I will be giving you credit for the survey along with the website address per your Copyright Restrictions page. I will need to add a few questions of my own to the survey. Will that be okay? Thank you for your time. Sincerely, Lisa Isla high school science teacher and NNU master's degree student.

Lisa - USA (26726)

Answer

Yes, you have permission to use the material, as well as to add a few of your own questions.

Best wishes for success in your research project.

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Correction in formula

Chemistry

January 28, 2016

Question

On your page regarding the order of elements in a chemical formula, you made the following statement:

"Most oxides will end in multiples of O, no matter what the alphabetical order. A good example is silicon dioxide: SO2"

However, I would just like to point out this (referring to the EXAMPLE) is wrong - I don't know if you are trying to refer to sulfur dioxide or SiO2. Just wanted to let you know so you could fix it! By the way, your page is amazing, super-informative and really helps me - thank you so much!

Shada - USA (26727)

Answer

Thanks for letting me know about that typo. I corrected the formula to be SiO2 in the Order of Elements in a Chemical Formula page.

I'm also glad the material has been useful to you.

Best wishes in your studies.

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Problems with flyaway hair

Physics

January 27, 2016

Question

The most problem I have is with my hair. It just flys and I can't get it to lay down. My hair is thin anyway and this makes it really difficult to handle.

Tresa - USA (26723)

Answer

See Controlling Flyaway Hair for some ideas. I hope that helps.

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Methods of discharging electroscope

Physics

January 27, 2016

Question

What are the methods of discharging electroscope.

Douglas - Zambia (26724)

Answer

You want to draw off the excess changes in the electroscope by touching the metal bulb or disk. You can draw off the charges by touching with your finger or with a metal rod. See Detection of Static Electricity for more information.

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What is Electromagnetism?

Physics

January 27, 2016

Question

What is Electromagnetism in general?

Dalitso - Zambia (26725)

Answer

Electromagnetism usually means the creation of a magnetic field from the movement of electrical charges. See Basics of Electromagnetism for more information.

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How can I be a pro in handball?

Sports

January 25, 2016

Question

this is not the handball we play at school. We play the one where you have four courts or squares . There is ace kings queens and duns. Ace gets to serve. I want to know how to become a pro at that handball. Because people are so good. And I am jealous. But anyway. Can you do this for me.
????

Jaymee - Australia (26720)

Answer

Yes, Australian handball is different that U.S. four-wall handball, but the principles in becoming good in the sport are the same.

You should not be jealous of players who are good in handball. Instead observe them to see what techniques they use that you can employ when you play the game.

You need to know the fundamentals of playing, good footwork and positioning, and how to use your arms properly.

Then practice, practice, practice. The more you play--especially with those slightly better than you--the better your game will be.

You might seek lessons from a pro or a good coach. That often can raise the level of your play.

JUst keep playing and improving, and you may be able to make it as a pro. Best wishes for your success in handball.

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Cancelling low frequency whispers

Physics

January 24, 2016

Question

How can someone cancel human speech, especially low frequency and low pitch whispers? Since spoken sounds contain many different wavelengths and frequencies it, in theory, should be easier to match a whisper with a 180 degree amplitude adjustment...is my thinking correct? Is there anyway to interfere with /cancel the 'sound' by altering electric or magnetic fields and what kinds of equipment could /would one use? Am I wrong thinking that speech can be manipulated(I.e. broadcast ) to travel long distance via radio waves within electromagnetic field? If so, would one alter near or far field and how? Please understand: I am exploring possible alternative solutions for me a more than one application/problem. Thanks

Justin - USA (26718)

Answer

If a microphone can record low frequency and low pitch whispers, those frequencies can be cancelled out. The electronics can filter the complex waveform into distinct frequencies and amplitudes. Of course, it isn't exact, but changing the phase of the the narrow frequency bands is enough to cancel much of the sound.

Whether the sound is loud or soft doesn't affect the cancellation.

The active noise cancellation electronics uses changing electric fields to cancel the signals. You can now buy an inexpensive set of noise cancelling earphones to examine and use the electronics.

Radio waves are electromagnetic waves within the radio frequency band.

Best wishes in creating alternative solutions.

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Thinking of Big Bang Theory

Physics

January 24, 2016

Question

Finally.... I came up with this "theory" on my own several years ago but being that I'm no scientist or physicist or whatever, it was kind of silly of me to believe I was the only one. I could never find anything anywhere on the net though (I guess I was googling the wrong questions) but to add fuel to the fire, what about the Big Bang??? When we conceive, first there is nothing, sperm and egg come together then a mini explosion and BAM, cells appear out of nothing and start to multiply. Wasn't the Big Bang kind of the same, first there was nothing, then a mini explosion (not so mini to us) and BAM, galaxies appeared out of nothing and started to multiply. I know this is all impossible to prove but when you really stop and think about it, it makes a hell of a lot more sense than the magical invisible man in the sky who will punish us for all eternity if we do something wrong, but he loves us.... Doesn't it?

Are there any sites or groups or something on this subject apart from this page that you know of? Is there a specific name for this "theory" (if that's what it is)

Thank you so much for being here, it's a relief to know I'm not the only one who thinks this way.

Paul - Australia (26719)

Answer

The Big Bang Theory supposes that all the matter in the Universe was compressed into a compact ball when something triggered it to explode and spread out the matter, which then collected together as stars, galaxies, and other objects.

The Multiverse Theory states that there were many such explosions and many other universes besides our own.

With conception, the sperm and egg are really highly complex living cells that combine and start to grow into a human. However, it might be possible that two different compact balls of mass met and then exploded into our Universe. That might be a good explanation of why the Big Bang occurred.

I'm sure there are groups interested in the Big Bang Theory in Facebook or through MeetUp.

Best wishes in your studying these things, and keep up your curiosity.

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Why is homework important after math lesson?

Grades

January 20, 2016

Question

state and explain three reason why it is important to be given homework right after mathematics lesson

Kudzai Isau - Zimbabwe (26716)

Answer

One reason for homework is to verify that you understand the material taught in class. Doing the homework right away helps this process.

Another reason is that doing homework right after the lesson reinforces what you learned in class. If the homework is skipped, you might not remember what was taught.

In mathematics, it is important to practice solving different types of problems and performing various operations. Your homework will give you that practice to help in understanding the principles.

Best wishes for success in your mathematics class, as well as the others.

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