Your clock radio awakens you with a steady and irritating sound of frequency 600 Hz. One morning, it malfunctionsand cannot be turned off. In frustration, you drop the clock radio out of your fourth-story dorm window, 15.0 m fromthe ground. Assume the speed of sound is 343 m/s. As you listen to the falling clock radio, what frequency do you hearjust before you hear it striking the ground?

Find for the Cross Product of the following pairs of vectors 1. A=4i-5j +8k, B = -2i+3j+3k 2. C = -6i+4j+7k, D=4i-j+5k 3. E= -i-5j + 2k, F = 8i+2j-6k

You've entered the Great Space Race. Your engines are hearty enough to keep you in second place. While racing, the person in front of you begins to have engine troubles and turns on his emergency lights that emit at a frequency of 5.640 x 1014 Hz. If the person in front of you is traveling 2627 km/s faster than you when he turns on his lights, what is the frequency of the emergency lights that you observe when it reaches you in your spaceship? (Enter your answer to four significant figures.) 4.0 Hz Additional Materials

7. On a given day, the speed of sound in air is 3434m/s. As an emergency vehicle approaches you, youhear a tone that is 1200Hz. That type of emergency vehicle has a siren that emits a tone that is 1050Hz.(a) What is the speed of the vehicle? (b) As it drives away from you, what tone do you hear?

Energy from the Sun arrives at the top of the Earth's atmosphere with an intensity of 1.30 kW/m2. How long does it take for 2.39  109 J of energy to arrive on an area of 1.00 m2? This is the average monthly electrical energy consumption of a family of four in the United States.

Yellow light travels at a speed of 1.97 108 m/s through a certain glass block. The wavelength of light transmitted through this kind of glass is 3.835 10-7 m. What frequency does yellow light have?Hz.

It's Christmas time and you blast your Christmas music with the windows down in your car. Your grinchy roommate hears your music 30 meters away. The final note in the song is a B, playing at 493 Hz, but your roommate smiles because to him it sounds like a B-flat, playing at 440 Hz. How fast are you driving relative to your roommate? And in what direction?

A short blast is emitted somewhere beteeen two reflecting cliffs. Two echos are heard, once at 0.6 sec and the next at 0.9 sec. Given the speed of sound is 330 m/s, how far apart are the reflecting cliffs?

A rescue plane is moving to an emergency beacon that has a frequency of 15.2 kHz. The plane is traveling at 140 m/s.  (a) What is the wavelength of beacon picked up by the plane? (b) Can the people on the plane hear the beacon? (velocity of sound in air is 343 m/s)

In a loudspeaker, an electromagnetic coil rapidly drives a paper cone back and forth, sending out sound waves. If the cone of a loudspeaker moves sinusoidally at 1.2 kHz with an amplitude of 3.5 mm, what are the cone’s maximum speed and acceleration?