All of the cancer symptoms metastasis depend on the location of the tumor, When cancer begins, It invariably produces no symptoms, The signs and symptoms only appear as the mass continues to grow or...
Each substance has its density, The density is a physical property of the matter as each element and compound has its density, and it varies with the temperature and the pressure.
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 object or try...
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 state of...
