There are several different models that represent compounds. One type of model is shown. A large black sphere connected to 4 small blue spheres by 4 grey sticks. What type of model is shown?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?