Final answer:
The statement is true. Doppler radar is used to measure the motion of particles in the atmosphere and is widely used by meteorologists. The statement is true.
Step-by-step explanation:
The statement is true. A network of more than 100 Doppler radar units covers nearly all of the 48 contiguous United States. Doppler radar uses the Doppler effect to measure the motion of particles in the atmosphere, such as raindrops or snowflakes, by analyzing the change in frequency of the radar signal caused by their motion. This data is then used by meteorologists to track weather patterns and make accurate weather forecasts.
The statement is true as the National Weather Service operates a widespread network of Doppler radar units across the contiguous United States, crucial for weather forecasting and warnings.
The statement that a network of more than 100 Doppler radar units covers nearly all of the 48 contiguous United States is true. The National Weather Service operates a network of such radars, known as NEXRAD or WSR-88D, which provide detailed weather data including precipitation, wind, and storm movement. These Doppler radars are crucial for meteorologists when it comes to forecasting weather and issuing warnings for severe weather conditions, such as thunderstorms and tornadoes. The application of the Doppler effect in these radars exploits the change in frequency of the returned signal due to the motion of weather particles, thus providing insights into the dynamics of weather systems.