Each day readers send in questions and feedback concerning the various lessons in the School for Champions website. A total of 15928 letters have been answered. They are listed according to date.
You can read them to further your understanding of the subjects.
|What type of lever is it?||Machines||India|
|Biological importance of nitrogen||Chemistry||Algeria|
|Is the brain an electric circuit?||Physics||Jordan|
|Lessons helped me very much||Thanks||Machines||Kosovo|
|Pendulum period in a lift||Motion||India|
|Doctors not helping health condition||Health||USA|
|Guitar amplifier frequency||Electricity||Hong Kong|
|Lichen berg test||Static Electricity||Iran|
|Find the CG||Gravity||Nigeria|
|What is the object lifted by a lever?||Machines||India|
|Converting to PDF||FrameMaker||USA|
|Applying Ohm's Law for 220V AC||Electricity||Pakistan|
What type of lever is it?
March 20, 2018
I scoop hockey ball which lever applied
I hit six in cricket which lever apply
Dinesh - India (28478)
Look at where the effort force is applied, where the pivot point is, and where the load or output is to determine the type of lever. See Three Lever Classes for more information.
Biological importance of nitrogen
March 17, 2018
i've project under title :"Elements of the nitrogen group."
can you plaese give me the Biological importance of this elements please .
please send the answer to my email address
and thank you
sarra - Algeria (28476)
Nitrogen is a component of amino acids and urea. Amino acids are the building blocks of all proteins. Proteins comprise not only structural components such as muscle, tissue and organs, but also enzymes and hormones essential for the functioning of all living things. Urea is a byproduct of protein digestion.
Is the brain an electric circuit?
March 15, 2018
Is the brain an electric circuit?
Sewar - Jordan (28475)
The brain consists of an electric circuitry consisting of neurons that send and process very small electrical signals. It is more complex than the common electrical circuits we use.
Lessons helped me very much
March 14, 2018
Hello, your lessons help me very much so I just wanted to thank you with this email
Enis - Kosovo (28474)
I am glad that the lessons have helped you. Best wishes for success in your studies. I know that you will excel.
Pendulum period in a lift
March 13, 2018
A lift is ascending at acceleration of 3 m/sq.s. What is the period of oscillation of simple pendulum of length 1m suspended in lift.
Vijay - India (28473)
The acceleration of the lift will add to the force caused by gravity. In other words, it increases the value of "g" to g = (9.8 + 3)m/s^2.
Simply substitute g = 12.8 m/s^s in the pendulum equation.
Doctors not helping health condition
March 12, 2018
I live in a country with wishy washy health protocol and doctors who operate within 'boxes'; not really caring whether patients are healed or get some form of relief; not as my health condition kept deteriorating. My health challenges began with environmental hazard-mold and carbon poisoning. Severe breathing and oxygen deficiency. Only to learn after five years of being treated for symptoms of....that there is no medical protocol for mold and carbon poisoning.I have so many symptoms it is confusing.
One I am sure about is a severe mineral deficiency main one being magnesium which I have been trying to fix on my own. the correct blood test does not exist to test magnesium deficiency.
What do I do? This is my life and I cant give up. After reading and reading and researching I am on a vicious looping cycle of Hyperhidrosis. All the symptoms are there with excruciating vicious cramps crippling me twisting all of me into weird shapes...I see my muscles sinking into pits in my arms hands legs toes..... Pains in head, vertigo, dizziness I have fallen many times - there is damage to my spine....no help THERE IS NO MEDICAL HELP. over the years so many other challenges - glandular etc.
WHAT DO I DO?
Usha - USA (28472)
I am sorry to hear that you are having these health problems. And I agree that there are many doctors who simply "go by the book" and don't really analyse symptoms and possible solutions. This is especially true concerning environmental hazards and poisoning.
I don't think excessive sweating is caused by forms of poisoning. But it might be a side effect. More importantly, you want to regain your health and get relief from your pain.
With many symptoms, you probably have a number of health issues. Note that forms of poisoning can create numerous symptoms.
Try to live as healthy of a lifestyle as possible, and in the meantime look for some doctors or clinics that can help you. Perhaps your doctors can recommend some specialized help, even in some other city.
Best wishes on getting relief and in getting healthy again.
Guitar amplifier frequency
March 10, 2018
For a guitar amplifier rated at 220V/50Hz, can I use it with a power supply at 220V/60Hz?
Roy - Hong Kong (28471)
The different power frequency may shift the output a little, but I believe it would be acceptable.
Lichen berg test
March 7, 2018
hi dear sir i am an Iranian student studying in 9 grade. i want to do lichen berg test for my teacher but i do not know how . may i have your help .excuse me my English is so bad.
z M N
zahra - Iran (28468)
The lichen berg test is a method to identify lichens, usually by checking the response to certain chemicals. I really don't have anything on the test, but you can check Lichen Spot Test for some information.
Best wishes for success in your experiment.
Find the CG
March 7, 2018
find the center of gravity of the following
1 uniform circular object
2 circular ring
4 irregular object
Mohammed - Nigeria (28469)
The center of gravity of the circular object and ring should be at the center of the objects. For the other objects, you may have to use a plumb line to find the center. See Center of Gravity for information.
What is the object lifted by a lever?
March 5, 2018
The object to be lifted by a lever is called...???
Pradip - India (28467)
The object lifted by a lever is usually called the load.
Converting to PDF
March 1, 2018
Can you convert a FM7/Mac file to PDF for me? I'm really just after that content and probably just one of the 2-3 pages. I can no longer open it due to MacOS upgrades and no corresponding FM Mac upgrades. Thanks.
Doug - USA (28464)
Sorry, but I do not have a MAC. You might try copying the file to Word or similar program and then creating a PDF.
Best wishes in making the conversion.
Applying Ohm's Law for 220V AC
February 28, 2018
ohm law is apply in A.c at 220 volts why it not apply apply when voltage is increased up to 220
hussnain - Pakistan (28460)
Ohm's Law states that Voltage = Current times Resistance. It applies in both AC and DC electricity and for 220 V AC.
As the voltage increases the current increase if the resistance is constant.
February 28, 2018
I found this page in Google search and I would like to state that I believe you are incorrect in your assertion that pounds measure weight (or more accurately: force). You state confidently that "as a student of science, you need to be careful in what you call things." I do not believe you are being very careful when you state that pounds refers to weight. Pounds has always referred to mass (even if the unaware conflate that with weight, as you have done here).
Because weight is defined in relation to the gravitational constant, the side effect of this is that most of the time it works out and that is in fact why this mistake is so pervasive.
The correct terminology to use is pounds (or pounds-mass if you are being overly verbose) when referring to mass and pounds-force when referring to weight. This is codified by law and numerous standards. See NIST and the US Code for more information. The pound is defined as a direct ratio to kilograms. The transitive property applies here in an almost comically textbook way. Kilograms are a measure mass, pounds are defined in direct relation as a ratio to kilograms; thus pounds are a measurement of mass. There can be *no* other interpretation here.
Richard - USA (28461)
Thanks for the comments. I updated Confusion about Mass and Weight Units to clarify the material.
Although some standards refer to pounds as mass, I found the definition of pounds as weight in five college Physics textbooks.
Also, weight refers to the force of gravity and not the gravitational constant. Although the mass is the same, the weight of an object on the Moon is only 1/6 the weight on Earth.
February 27, 2018
I Need Example Caculation
Obioma - Nigeria (28458)
See Doppler Effect Equations for Sound for some example calculations.
February 26, 2018
I was looking for some information on public speaking this morning when I came across your excellent resource page: https://www.school-for-champions.com/speaking/resources.htm
What a fantastic list of speaking resources!
I actually just published something on public speaking:
It might make a good fit for your page.
Either way, keep up the awesome work!
Dan - USA (28457)
Thanks for the suggested resource. I added a link on the Speaking Resources page.
Best wishes for success in your activities.
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