Two cars approach each other from opposite directions each with a velocity of 54 km/hr. One of the cars emits a note of frequency 480 Hz. What will be the approximate frequency heard in the other car before they pass each other? The speed of sound in this situation is 340 m/sec.

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.