- Mercury has a radius of about 2500 km , the Sun has a radius of about 7.0times 10^5 km, and a rubber ball has a radius of 5 cm. If you were to construct a scale model of the Solar System using the rubber ball to represent Mercury,what is the radius of a ball needed to represent the Sun in your model? 7.0times 10^5cm 140 cm 1400 cm 7.0 cm
- 10. In moving four times as far away from a cyrrent-carrying conductor, the density of the flux lines will have __ by FOPUfour times.
- 16. Two point sources are generating periodic waves in phase. The wavelength of the waves is 3.0 cm. A point on a nodal line is 25 cm from one source and 20.5 cm from the other source. Construct a sketch of the physical situation and determine the nodal line number.
- 19. The average distance from Earth to the Sun is about 150 refor to this distance as A. a light year B. an astronomical unit C. a parsec D. an Earth distance
- 18. Identify which of the following describes the term parallax. A. the apparent movement of closer objects compared to distant objects B. the apparent movement of closer objects due to the viewer's change in position C. the change in image between a viewer and a distant object D. the change in size between a closer object and a distant object
