One railroad car rolls toward another. Describe the properties of the first car that determine its momentum and how it would impart an impulse to the second car.

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

What can be found in the ionosphere

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %