2012年8月10日 · What is the observed frequency of a 1,200 Hz wave? The observed frequency of a 1,200 Hz wave is 1,200 cycles per second. This means that the wave completes 1,200 …

2017年4月14日 · A stationary police car emits a sound of frequency 1200 Hz that bounces off a car on the highway and returns with a frequency of 1250 Hz. The police car is right next to the …

2011年11月8日 · A sound source A and reflecting surface B move directly towards each other. Relative to the air the speed of source A is 29.9 m/s, the speed of the surface B is 65.8 m/s …

2003年7月22日 · The trailing vessel has a speed of 64.0 km/h relative to a land based observation point, and the leading ship has a speed of 45.0 km/h relative to the same station. The two …

2008年2月23日 · A police car speeds toward a warehouse door with its siren emitting sinusoidal waves of frequency fs = 300 Hz, intending to crash through the door. The car moves at 30 m / …

2006年8月5日 · Question: An ambulance with a siren emitting a whine at 1300 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s. After being passed, the cyclist hears a frequency …

2010年1月30日 · [Solved] Two Speakers - Sound Maximum and Sound Minimum Problem Hi, I am having difficulty solving the following problem: Homework Statement Two loudspeakers 5.0 …

2020年8月2日 · Assuming that the problem is an 80 Hz resonance in your house, it might be possible to change the driving frequency. 80 Hz is 4800 cycles per minute. That sounds like a …

2011年5月5日 · A glass tube with one end open and the other closed is used in a resonance experiment to determine the speed of sound. A tuning fork of frequency 427 Hz is used and …

2014年7月21日 · A manufacturing firm has hired your company, Acoustical Consulting, to help with a problem. Their employees are complaining about the annoying hum from a piece of …