Physical quantities The physical quantity is any quantity that can be determined and has a unit of measurement in our life , each physical quantity is measured in a special measurement unit , such...
The motion The motion is the change of the object’s position ( location ) as the time passes according to the location of another object , The motion happens all around us , We...
The nuclear forces in the nature The scientists have discovered that the atom stores a massive amount of energy inside the nucleus , and it is accompanied with forces known as the nuclear forces...
The weight The reason of object’s falling downward the Earth is a type of force called the weight ( the gravitational force ) , And you can feel this force when you carry an...
The properties of the mass The mass is the amount of the matter in an object , The mass of any matter is a fixed value , It does not change by changing the...
The force The force is the effect that changes the state of the object , The measuring unit of the force is ” Newton “ related to the scientist ” Isaac Newton “ ,...
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