Suppose a theremin uses an oscillator with a xed frequency of 90.1 MHz and an RLCcircuit with , , and . What is the beat frequency of these two oscillators? (Audio frequencies range from about 20 Hz to 20,000 Hz.) A. 3740 Hz B. 5100 Hz C. 4760 Hz D. 9000 Hz
Motions of the Stars and Sun 1. Constellations and Asterisms a. Constellations: one of 88 sections in the sky i. All countries agree on these regions ii. Utility of these regions is that if there is a particular object, you can get a rough idea of where it is in the sky based on what region it is in b. Asterisms: 2. using asterisms to navigate the sky a. Polaris is the most important star (North Star) b. It is very close to the spin axis, so it doesn’t look like it moves, so people use it as a reference point c. Some other famous constellations are the Big Dipper, the small dipper (the North Star is part of this)
