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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 15911 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

Page was really helpful Thanks USA
 
I want to be a good physician School for Champions Tanzania
 
I want to improve my grades School for Champions Tanzania
 
Resource Mental Health USA
 
Why does Newton's Cradle stop? Motion Nigeria
 
Thanks for the derivation Thanks Waves South Africa
 
Lifespan of a sloth Animal Health USA
 
Boys don't feel force between them Gravitation India
 
Is the magnetic field in a solenoid constant? Magnetism India
 
Calculate force Gravitation Nepal
 
Wants to perform Cavendish experiment Gravitation USA
 
Correcting units for weight Gravity Canada
 
Using sentence from page Gravitation UK
 
Venetian blind keeps swinging Motion USA
 
Did the Earth exist before Genesis 1 in the Bible? Religion South Africa
 

Next 15 letters

 





Page was really helpful

Thanks

February 23, 2018

Question

Hi,

I was working with sales research for my marketing class when I saw your Sales Resources page. It was really helpful! :)

Thank you and Have a nice day!

Madison Gayle - USA (28453)

Answer

I'm glad the resources were useful to you. Best wishes for success in your class.

Return to List

I want to be a good physician

School for Champions

February 22, 2018

Question

i want to be a good physician,what should i supposed to do?

rajab - Tanzania (28451)

Answer

First of all, you need to be very careful in what you write, because another person's health can depend on it.

Note that you incorrectly wrote your email address as: gmail@rajabhamis98.com

Study hard and read as much as you can about medicine practices.

Best wishes for success as a physician.

Return to List

I want to improve my grades

School for Champions

February 22, 2018

Question

i want to improve my performance in academic issue, could you help me?

rajab - Tanzania (28452)

Answer

To improve your academic performance, read, study, and learn how to take tests. See Return to List

Resource

Mental Health

February 20, 2018

Question

Hello,

My name is Dale, I was doing some research and I came across your website's resource page. I think it is great that you have resources listed to help those in need find quality help.

I had a resource you may find worth adding to your website. If you would like the link to look over just send me an email back! Thanks again :)

Truly,

Dale Vernor

dale - USA (28449)

Answer

Yes, send me your resource link and I'll check it out.

Return to List

Why does Newton's Cradle stop?

Motion

February 19, 2018

Question

why is it that the motion of newtons ball stop and many website name it as perpetual motion ball. and can this motion of the ball made to continue.

GODWIN - Nigeria (28444)

Answer

Perpetual motion means that the object moves forever, because there is no loss in energy. However, there is loss due to air resistance and loss due to the collisions of the balls in Newton's Cradle. Thus it slows and soon stops its motion.

Return to List

Thanks for the derivation

Thanks

February 19, 2018

Question

Thanks - the derivation for velocity of moving target measured from stationary source using ultrasound was just what I needed.

Neil - South Africa (28445)

Answer

I am glad that the materiel was useful to you.

Best wishes for success in your endeavors.

Return to List

Lifespan of a sloth

AnimalHealth

February 19, 2018

Question

How old are sloth in human Years?

Rai - USA (28446)

Answer

Sloths live between 25 and 30 years. That means that each sloth year equals 3 human years.

Return to List

Boys don't feel force between them

Gravitation

February 18, 2018

Question

two boys of mass 40 kg and 45 respectively and their distance is 2 metres but they do not feel any force between them .why

TIRTHANKAR - India (28441)

Answer

Although there is a force between them, that force is extremely small because both masses are small. Consider the effect of the mass of the Earth on a boy to see how huge at least one mass must be to be felt.

Return to List

Is the magnetic field in a solenoid constant?

Magnetism

February 17, 2018

Question

Magnetic field inside a solenoid is same or vary at different point?

Neeraj - India (28439)

Answer

If the wiring outside the solenoid is consistent, the magnetic field should be constant. Of course,it will change near the ends of the solenoid.

Return to List

Calculate force

Gravitation

February 15, 2018

Question

calculate the gravitational force between 8000kg and
50,000kg masses which are at 10m a part from each other?

- Nepal (28429)

Answer

Apply the equation F = GMm/R^2, where G = 6.674*10^?11 N-m^2/kg^2.

You should be able to do the calculations yourself by substituting the numbers into the equation.

Return to List

Wants to perform Cavendish experiment

Gravitation

February 13, 2018

Question

Hi Ron,
I just purchased your Gravity book and look forward to reading it. I am a retired NASA engineer and I want to do the Cavendish experiment for myself. I have made inquiry to Lambda Scientific for their apparatus http://lambdasys.com/products/detail/17 Are you familiar with this, or can you refer me to other apparatuses that are available?

Mark - USA (28426)

Answer

I am sure it would be interesting to perform the Cavendish experiment yourself. I'm not sure what their price is, but looking at other similar products, it could be expensive:

Frey Scientific sells a similar device, but the cost is $1120.

PASCO Scientific sells their's for $2300.

It might be worthwhile checking the Physics department of a nearby college or university to see if they have a Cavendish Balance that you might be able to use in their lab. Or perhaps a Physics professor could point you in the right direction.

Best wishes on getting the equipment and performing the experiment.

Let me know how things turn out.

Return to List

Correcting units for weight

Gravity

February 5, 2018

Question

Hi, Very good article. I understand that mass is defined as being the amount of matter and weight is the force of gravity on a mass, but just before the summary, you are saying "if you weight 60 Kg (132 pounds) on the earth.... shouldn't it read 588 Newton since you are referring to weight? Or does it refer to Kg force? If so, should it read 588 Kg force since it's multiplied by the force of gravity "a"? Thank you!

Hubert - Canada (28417)

Answer

Thanks for pointing that out to me. I updated the page and changed the 60 Kg to 60 N. I should have been more careful. Also see Confusion about Mass and Weight Units for a better explanation.

Return to List

Using sentence from page

Gravitation

February 3, 2018

Question

Hi, is it ok to copy theee words?
'After the Big Bang, gravitation influenced the formation of the galaxies, stars and planets within the Universe'

I'm writing about the big bang and need this sentence.

Regards

Muhammad - UK (28416)

Answer

Yes, you can use that sentence. If you are able to, it would be nice to cite the link to our web page.

Best wishes for success in your essay.

Return to List

Venetian blind keeps swinging

Motion

February 3, 2018

Question

I feel silly for asking, but my Venetian blind has been swinging for almost 16 hours. Uh, pendulum? https://www.facebook.com/renejonesnorton/videos/2045769342116603/

Rene - USA (28415)

Answer

We also have vertical Venetian blinds that occasionally swing like that due to a heater vent on the floor nearby. But it only moves when the furnace is on.

It seems strange that only the end blind seems to be moving. There could be a draft from the sliding door or some other source of airflow in your room.

You could do some experimenting and hold a tissue and move it around the area to try to find the source of the airflow.

Let me know if you can solve this puzzle.

Return to List

Did the Earth exist before Genesis 1 in the Bible?

Religion

February 1, 2018

Question

Did the earth existed before Genesis 1 and was there a world before Genesis 1 Some believe it was where the dinosaurs came from.

Henrico - South Africa (28413)

Answer

The article Big Bang Theory and Religion gives a good explanation relating to the views of various religions on this issue.

I hope that helps answer your question.

Return to List

Next 15 letters


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