قانون نيوتن الثالث قانون نيوتن الثالث هو أحد قوانين الحركة التي وضعها نيوتن وهو:لكل فعل قوة رد فعل مساوية لها بالمقدار ومعاكسة لها بالاتجاة تعملان على نفس الخطوتؤثران على جسمين مختلفين
تمعنوا في هدا المقطع واجيبوا على السؤال:
اي الجمل التالية تتفق مع قوتي الفعل ورد الفعل المشار اليها المشار اليها في قانون نيوتن الثالث "في الحركة" :
... Continue Reading
جهاز الدياليزا احدى الوسائل التكنولوجيه التي اثبتت نجاعتها في المحافظه على حياه وصحه الأشخاص اللذين يعانون من الفشل الكلوي (أي خلل في الكليتين) هي الكليه الاصطناعيه والتي يعتمد عملها على تقنيه الدم بواسطة الانتشار اذ ينتقل دم المريض عبر انابيب ذات اغشيه شبه نفاذه بحيث تكون هذه الانابيب مغموسه في سائل يدعى"سائل الدياليزا"
كيف ينتقل دم الشخص اللذي يعاني من الفشل الكلوي اثناء العمل الاعتيادي للكليه الا... Continue Reading
Ocean Acidification When carbon dioxide (CO2) is absorbed by seawater, chemical reactions occur that reduce seawater pH, carbonate ion concentration, and saturation states of biologically important calcium carbonate minerals. These chemical reactions are termed "ocean a... Continue Reading
Heat capacity and energy Different
materials heat up in different rates. This phenomena is important and could be
seen everywhere in our daily life: When we are heating different foods on the
stove, when we go to the beach and feel the hot sand compared to the cool
water... Continue Reading
The speed of falling objects
Four
hundred years ago, the Italian scientist Galileo Galilei claimed that in the
absence of any atmosphere, all bodies on earth (e.g. a hammer and a feather)
would fall to the ground in the same speed, since there would be no air
resistanc... Continue Reading
Photoelectric effect Photovoltaic
is an applied technology for the utility of solar energy, which covers the conversion
of light into electricity using metal materials that exhibit the photoelectric effect.
The
photoelectric effect is a phenomenon that ... Continue Reading
complex numbers multiplication A сomplex number is represented by z=a+bi , a and b are real numbers and i is the imaginary unit ,satisfying the equation i2 = −1.
For more information about complex numers link to:
http://blossoms.mit.edu/videos/lessons/comple... Continue Reading
arithmetic sequence Arithmetic Sequence
In an Arithmetic Sequence the difference between one term and the next is a constant. In other words, we just add the same value each time ... infinitely.
In General we could write an arithmetic sequence like ... Continue Reading
Backgammon Game Consider throwing a coin multiple times. Even huge amount of times. Let's discuss - what would be the number of times you would get a particular side out of the total number of throws?
Let's see that in any occasion of throwing a symmetri... Continue Reading
Galileo thermometer A Galileo
Thermometer is a device made of a sealed glass cylinder, containing a clear
liquid (water, for example), and several floating glass bubbles, each filled with a
different color liquid, and a small metal tag hanging from it.
... Continue Reading
בולענים בולען הוא שקע הנפער בקרקע, בדרך כלל בפתאומיות. תופעת הבולענים עלתה לאחרונה לכותרות עקב היווצרות בולענים רבים באזור ים המלח.
בולענים נוצרים כתוצאה מזרימת מי תהום מתחת לפני הקרקע, שגורמת להמסת שכבות גיר או שכבות מלח, הגורם להווצרות לחללים ריקים (מערות) או חללים המכילים בוץ. לאחר היווצרות החללים בכמה מקומות בשכבה שמתחת לפני הקרקע, נוצרים סדקים ההולכים ומתרחבים בשכבת פני השטח, ולבסוף קורסת השכ... Continue Reading
Why does Earth have deserts? Take a look at a physical map of the world. You can notice that all deserts on our Earth are located at approximately thirty degrees on either side of the equator.
Learn what is the reason for that phenomenon from the video below ... Continue Reading
planting trees Why do gardeners
prefer to plant trees in silty soil instead of in sandy soil?click here for using the animation.
Select
the correct answer:... Continue Reading
שאלה בשפת c כתוב תוכנית שמקבלת פונקציה של שני מערכים של תווים.
התוכנית תחזיר מצביע למערך החדש של התווים מהאות הקטנה לאות הגדולה.
הפונקציה תקצה מערך חדש של 2 מערכים ללא חזרות של האותיות ותדפיס.
char *func(char a[],char b[]);
char a[]='a','b','j','g';
char b[]='z','s','d','k','l','g';
הפלט:
a b d j g k l s ... Continue Reading
Sea level rise risk Sea level is a term describing the altitude of the water at sea(Haifa) picture taken by :dina izGlobal warming due to human activity has countless examples all over the world.Global warming is basically the constant rise of the world average temperat... Continue Reading
Plastic recycling Plastic is manufactured by the polymerization
process, which connects monomers to create polymers. Common types of polymers in
our lives are presented in the table below:
Example... Continue Reading
Multimedia Questions
Inquiry Questions
