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 as the mass, the...
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 see the objects such as the...
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 which can be divided into the weak...
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 object or try lifting it,...
