List of Topics

SfC Home > Physical Science >

 

Feedback Q&A on Physical Science Basics

by Ron Kurtus

A total of 41 comments and questions have been sent in. They are listed according to date.



List of most recent 10 letters

Topic

Title

Country

Fundamental Units of Measurement What is mechnical designing? USA
 
Fundamental Units of Measurement Which is a fundamental unit? India
 
Using Mathematics Relatinship between math and science India
 
Become a Champion in Physical Science What is a redox reaction? South Africa
 
Fundamental Units of Measurement Why there are seven basic units? Pakistan
 
Jobs Using Physical Science Want to be an engineer RSA
 
Physical Science Overview I need help with the calculations South Africa
 
Using Calculator Solving problem using calculator UAE
 
Using Calculator Does not perform factorial of negative number USA
 
Champion Need help with syllabus on Physical Science South Africa
 

Next 10

 





What is mechnical designing?

Topic: Fundamental Units of Measurement

Question

July 2, 2015

Mechanical designing

nadir - USA

26148

Answer

Mechanical designing is one part of Mechanical Engineering, which is one of the largest, broadest, and oldest engineering disciplines.

Mechanical engineers design and manufacture machines and devices of all types. They also create the processes and systems used in technology and industry.

Back to top


Which is a fundamental unit?

Topic: Fundamental Units of Measurement

Question

May 31, 2015

Which of the following is a fundamental quantity. 1. Weight 2. Quantity of substance 3. Density 4. Area

Suchitra - India

26048

Answer

A fundamental unit is one that is not a combination of other units.

Weight is mass time gravity. Density is mass divided by area, Area is length times width.

The amount of quantity of a substance in chemistry is a mole and is considered a fundamental unit.

Back to top


Relatinship between math and science

Topic: Using Mathematics

Question

January 9, 2015

How Are Math and Science RelatION

sunil - India

25695

Answer

You can study the facts of science with little or no math. However, in many areas of science--like Physics, Astronomy, and Chemistry--equations are used to make calculations. In such cases, you need some knowledge or Algebra and Arithmetic to work with the equations and make the calculations.

Advanced science subjects may require knowledge of advanced math, such as Calculus.

Back to top


What is a redox reaction?

Topic: Become a Champion in Physical Science

Question

October 6, 2013

as i am a young i want your help can you explain for about redox reaction and how does it works? .i realy want to excell on physical science and i realy need ur help.

mthobisi - South Africa

24079

Answer

Redox reaction stands for a reduction-oxidation reaction. It is part of Chemistry.

It is a chemical reaction in which atoms have their oxidation state changed. It involves the transfer of electrons between different types of atoms or molecules.

One example is the oxidation of carbon to yield carbon dioxide (CO2). Another is the reduction of carbon by hydrogen to yield methane (CH4).

I hope this helps. Best wishes for success in Physical Science.

Back to top


Why there are seven basic units?

Topic: Fundamental Units of Measurement

Question

September 16, 2013

why there are seven basic units???

ahsan - Pakistan

24017

Answer

A committee of scientists decided on the seven units that are basic.

Time, length, and mass certainly are fundamental or basic units, since such measurements as velocity, force, and energy can be derived from them. Electrical current is said to be basic, resulting in a magnetic field.

However, I do not think temperature should be included, since it is a result of energy and thus is not basic.

Back to top


Want to be an engineer

Topic: Jobs Using Physical Science

Question

January 19, 2013

I'm doing science and I want to know that is physical science difficult. I have no idea of what's happening. I want to be an Engineer one day can I make it without dropping out during the years?

Nkanyiso - RSA

23135

Answer

First of all, you should decide on what type of engineer you would like to be. Some examples are chemical engineer, electrical engineer, and mechanical engineer. Each has their own requirements.

Physical Science gives an overview of Astronomy, Chemistry, Physics, and Geology. Your engineering course may require further study in those areas, as well as mathematics courses.

Look at college catalogs for the course required for the type of engineering you are interested in.

Don't even think about the possibility to drop out. If courses you take are too difficult, you can make adjustments to take courses that suit your skill and talent.

Best wishes on a successful career. I know you can do it.

Back to top


I need help with the calculations

Topic: Physical Science Overview

Question

August 29, 2012

I need help with the calculations. I'm writting in two months time, thank you in advance

sibahle - South Africa

22868

Answer

What sort of information do you need concerning calculations? In what area of Physical Science are you having problems?

Back to top


Solving problem using calculator

Topic: Using Calculator

Question

April 20, 2012

Hello,

I have a math examination coming up so I need answers quickly. I typed in an expression on my calculator, and I got the wrong answer to the question. When I checked my working, everything was correct. I then used my friend's calculator to type in exactly the same expression and I got the correct answer to the question, so there must be something I have to change in my scientific calculator. The expression was: ?21^2+15^2-2(21)(15)cos(98). The whole expression is under the square root sign incase it is unclear. The answer I should get when I type it into my calculator is 27.45. I got this answer using my friend's calculator, but when I used mine to type exactly the same thing,I got 333.(some decimal numbers).
Any help will be much appreciated. Can you please make the reply very easy to understand and clear because I not a genius with calculators.
Thank you very much,

Lukman - UAE

22600

Answer

Some scientific calculators allow you to enter terms in order. However, many aren't good at calculating complex expressions. Using the scientific calculator that comes with Windows, I started from the back of the expression. 98+cos= -0.139. Then multiply that times 15*21*2, resulting in -87.68... Change the sign to +87.68... and put that into the memory M+.

Clear C and calculate 15^2 = 225. + MR = to add it to what is in the memory 312.68, and put that into the memory MS.

Clear C and calculate 21^2, then + MR = 763.58

Now for some reason there is no square root in the Window scientific calculator, so you switch over to the Standard version (View Standard). Recall memory MR and SQRT = 27.45.

Now, it is very easy to make a mistake using only a calculator. I think it is really better to calculate the individual items write them on a paper.

Also, I assume the ? at the front of the expression was meant to be the square root sign.

I hope that helps.

Back to top


Does not perform factorial of negative number

Topic: Using Calculator

Question

March 14, 2012

Good Morning.

I was trying to calculate -5.25! and the calculator returned me a message error.

So, what about Hadamard´s Gamma function ?

Otherwise you could use the L-Factorial function.

Best regards,

Edgar - USA

22507

Answer

Thanks for the "heads-up" on the calculator.

Although the calculator is supposed to be scientific, it only covers the basic scientific functions. It will only do a positive integer factorial (n!).

Also, I noticed that the application is somewhat out-of-date. I'll try to get an updated version or remove it from the site.

If you are using Windows, it has a scientific calculator that will calculate -5.25! accurately.

Back to top


Need help with syllabus on Physical Science

Topic: Champion

Question

January 31, 2012

I need help with the old syllabus on physical Science plz help me

Denver - South Africa

22395

Answer

I'm sorry, but I don't have a syllabus on Physical Science available.

Back to top

Next 10


Summary

Hopefully, this reader feedback has helped provide information about Physical Science basics.


Science in amazing!


Resources and references

Ron Kurtus' Credentials

Websites

Resources

Books

Top-rated books on Physical Science


Questions and comments

Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. I will try to get back to you as soon as possible.

Please include it as a link on your website or as a reference in your report, document, or thesis.

Copyright © Restrictions


Where are you now?

School for Champions

Physical Science topics

Feedback on Physical Science




Physical Science topics

Basics

Other areas



Let's make the world a better place

Be the best that you can be.

Use your knowledge and skills to help others succeed.

Don't be wasteful; protect our environment.

You CAN influence the world.





Live Your Life as a Champion:

Take care of your health

Seek knowledge and gain skills

Do excellent work

Be valuable to others

Have utmost character

Be a Champion!



The School for Champions helps you become the type of person who can be called a Champion.