A Martínez is one of the hosts of Morning Edition and Up First. He came to NPR in 2021 and is based out of NPR West. Before he joined KPCC, Martínez had never listened to public radio. He views ...

Free body diagrams do not need to be drawn to scale but it can sometimes be useful if they are. It is important to label each arrow to show the magnitude of the force it represents. The type of ...

Have no fear—affinity diagrams are here to save you from getting overwhelmed by the sheer volume of data you’ve gathered. They’ll help you navigate through and organize your data in an incredibly ...

These models show how the atoms and bonds are arranged in space. The diagram shows a ball-and-stick model of ammonia.