Category Archives: 1950s
Uniform circular motion is defined and demonstrated. Expression for magnitude of centripetal force is explained in general and illustrated in connection with a body whirling on a string, a car on a loop-the-loop, gravitational attraction and the motion of an electrically charged particle in a magnetic field.
Depicts techniques, materials and equipment developed in using aircraft for mosquito control. Indicates the kind of situation in which such control may economically and feasibly be applied.
Illustrates the city’s origin, its rise to power and wealth through trade, its decline with the coming of new trade routes and its survival as a thriving and impressive city through adaptation to new conditions. Uses animation and photography to explain the unusual location of Venice, which is built on islands. The origin of the [...]