Thorium (Th) has an average atomic mass of 232.04 u and an atomic number of 90. In the space below, draw a square from the periodic table to represent thorium.

Which branches of natural science include the study of an organism that lived 10 million years ago

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.

Abox is sliding on a frictionless surface when it suddenly begins to rain heavily. if the downpour of rainfall falls vertically into the box