Dr. SaMeH S. Ahmed

Associate Prof. of Environmental Engineering

Densities of vario

Densities of various materials

Material ρ (kg/m3) Notes
Aerogel 1.5 Lowest achieved densities
Aluminium 2,700 At STP
Antimony 6,690 At STP
Atomic nuclei 2.3×1017 Does not depend strongly on size of nucleus[10]
Beryllium 1,850 At STP
Bismuth 9,750 At STP
Black hole 4×1017 Mean density inside the Schwarzschild radius of an Earth-mass black hole (theoretical)
Cadmium 8,650 At STP
Chromium 7,200 At STP
Cobalt 8,900 At STP
Copper 8,940 At STP
Cork 240 Approx.[6]
Diamond 3,500 At STP
Earth's atmosphere 1.2 At sea level
Glycerol 1,261 [8]
Gold 19,320 At STP
Ice 916.7
Interstellar medium 10−20 Assuming 90% H, 10% He; variable T
Iridium 22,420 At STP
Iron 7,870 At STP
Lead 11,340 At STP
liquid hydrogen 70
Lithium 535 At STP
Magnesium 1,740 At STP
Manganese 7,325 Approx.; at STP
Mercury 13,546 At STP
Molybdenum 10,220 At STP
Neutron star 1017
Nickel 8,900 At STP
Niobium 8,570 At STP
Osmium 22,570 At STP
Plastics 1,175 Approx.; for polypropylene and PETE/PVC
Platinum 21,450 At STP
Plutonium 19,840 At STP
Potassium 860 At STP[7]
Rhodium 12,410 At STP
Selenium 4,800 At STP
Silicon 2,330 At STP
Silver 10,500 At STP
Sodium 970 At STP
Styrofoam 75 Approx.[6]
Tantalum 16,600 At STP
The core of the Sun 150,000 Approx.
The Earth 5,515.3 Mean density
The Inner Core of the Earth 13,000 Approx.; as listed in Earth
Thorium 11,700 At STP
Tin 7,310 At STP
Titanium 4,540 At STP
Tungsten 19,300 At STP
Uranium 18,800 At STP
Vanadium 6,100 At STP
Water (fresh) 1,000 At STP
Water (salt) 1,030
White dwarf star 108 Approx.[9]
Zinc 7,000 At STP

The best book

Prayer Times

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Office hours

Sunday:     12-1

Monday:     12-1

Tuesday:     10-12

Wednesday: 10-11

You are welcome to contact me by at any time

You  may also contact me via WhatsApp group, ..

Ext. 2524

Civil Eng. Students

DON'T miss!

Love your department and be proud of your field of study

As we approaching the second midterm exams..  Get ready and remember our offices are open to answer you . do not hesitate to .contact me if you have difficulties

For CE 370 students : I do apologize for did not attend the extra lab session that proposed to be on Wednesday at 6 am.  Sorry

Good Luck


My Dear Students

Please visit the  announcement box for the relevant course and make sure that you can download and upload easily, otherwise

.contact me  to sort it out

There will be an orientation session in the midell of this term to help you select your track in Civil and Environmental Engineering


Special Issue

Electrical Power Resources: Coal versus Renewable Energy

  Published Online on January 2016

Mining Engineering

Mining engineering is an engineering discipline that involves practice, theory, science, technology, and the application of extracting and processing minerals from a naturally occurring environment. Mining engineering also includes processing minerals for additional value.

Environmental Engineering

Environmental engineers are the technical professionals who identify and design solutions for    environmental problems. Environmental engineers provide safe drinking water, treat and properly dispose of wastes, maintain air quality, control water pollution, and remediate sites contaminated due to spills or improper disposal of hazardous substances. They monitor the quality of the air, water, and land. And, they develop new and improved means to protect the environment.


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College of Eng. MU



Universities I've worked in

Assuit University (Home University), Egypt

Imperial College, London, UK

Faculty of Engineering, Al-Mergeb University, Libya

King Saud University, KSA

,Majmaah University

Majmaah University has a very nice web page that provide  all information regarding deanships, colleges, activities,  campuses and many others. Search your request in

Also visit

My Academic Pages


and give me


How many red balls we need to make balance 


Egypt vs Tunisia (Handball final)  30/1/2016

Currency Converter

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Course 2016/17-1

  1. Computer Applications in Surveying  CE 473
  2. Surveying 1 CE 370
  3. Photogrammetry CE 474
  4. Surveying II  CE 371
  5. Design I  (round 4) CE 498

The Rules of Life

Rule #7


Member of the Editorial Board: " Journal of Water Resources and Ocean Sciences"  2013


Participating in The Third International Conference on Water, Energy and Environment,(ICWEE) 2015 - American University of Sharjah, UAE 24-26 March 2015 with a Paper and Poster

New article

Recovery of Titania from Waste-Sludge of Majmaah Water Treatment Plant

"Production of Titania Nano-particles from Wast-


Coming soon

Results of M2 CE311

Student Conference

Participation  in the 6Th Student Conference

With a paper and oral presentation

From the Senior Design Project CE499 -35

See inside, the paper, and presentation

CE 370 Course

Surveying  I -  CE 370 - 2016-2017-1

Power point


Lecture notes

Second Midterm Exam


Model Answer
Inside, please follow:

Student Performance Records

CE 371 Course

Surveying II - CE 371 - 2016-2017-1


First midterm exam



See Inside

Student Performance Records

CE473 Course

Computer Applications in Surveying

CE 473


Power point


Exams + Quizzes


CE 474 Course

2015-2016-2 - Photogrammetry  CE474

Available 0-1-2-3-4 Power point


Quizzes 2 and 3 with model Answer

Available Chapter 1,2,3,4,5 Lecture notes

Report 1  Cameras Report


60 marks Exams

See Inside

Student Performance Records

CE 360 Course

Environmental Engineering 1

CE 360: Environmental Engineering 1


Y PP0-1-2-3,4 Power point
Y 1,2,3,4,5 Chapters

Water quality Poster + Climate Change Reports
will be announced (Quiz #2 will be using D2L- Online Quizzes


Quizzez 2,3 and 4 with model answer and results Exams and results

GE 306 Course

Engineering Report Writing

GE 306: Engineering Report Writing

CE 499 Course

Senior Design 2 - CE 499

Meeting on 14-4-2015

Second Best paper from Senior Design Projects in 2015

Paper title:

Evaluation of Groundwater Quality Parameters using Multivariate Statistics- a case Study of Majmaah, KSA


Abdullah A. Alzeer

Husam K. Almubark

Maijd M. Almotairi

CE 360-Summer Course

Environmental Engineering I

Welcome to CE360 second Term 2015-2016 

Engineering Practice

 Engineering Practice GE 307

What is your opinion

Contact me

Mobile: 00966598311652

[email protected]

Civil and Environmental Engineering Department
College of Engineering, Majmaah University
Majmaah, P.O. 66, 11952, KSA

Thank you

Your frequent visit to my website has helped  a lot to get the 2nd place in the university competition in the  year 1434-2013... Thanks very mush and please keep following my work

زيارتكم المتكررة لموقعي ساهمت في حصولي على المركز الثاني لاحسن المواقع الشخصية بجامعة المجمعة ...لكم جميعا خالص شكري وتقديري

CE 212 - Summer Course

Properties and Strength of Materials 1

CE 212

Y from PP0 to PP 6 + PDF Power points
Y Midterm #2 + Model Answer + results Exams
Y lab 3 Labs

Solution of Quiz 4 + Results HW

CE 311- Summer Course

Soil Mechanics and Foundation Engineering

CE 311

M2+ model Answer + PP 1-9 = PDF 1-9 all are available

Sheets 2 + 4 with model Answers

Results of M2

إحصائية الموقع

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البحوث والمحاضرات: 1541

الزيارات: 58727