CNN reviewed and geolocated videos that demonstrate just some examples of federal agents’ tactics in the Twin Cities.

A montage of forces in action. This includes images of people hitting balls, a wind buggy and a lorry braking. Students could brainstorm different examples of push and pull forces and go on to use ...

In the olden days — a mere 20 years ago — people talked about hard colloidal particles and soft vesicles or micelles, which covered all sizes from the micrometre to the nanometre regime. Now we talk ...

Multiple forces act on an object at the same time. The size and direction of these forces determines the movement of the object. Show the forces acting on an object in a free body diagram. The arrows ...