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)

Light is an electromagnetic wave and travels at a speed of 3.00 x 10° m/s. The human eye is most sensitive to yellow-green light, which has a wavelength of 5.68 × 107 m. What is the frequency of this light?

A ship mapping the depth of the ocean emits a sound of 37 kHz. The sound travels to the ocean floor and returns 0.65 s later. (a) How deep is the water at that location? (b) What is the wavelength of the wave in water? (c) What is the wavelength of the reflected wave as it travels into the air, where the speed of sound is 350 m/s?

The light intensity 4.4 m from a light bulb is 0.59 W/m^2. What is the power output of the bulb, assuming it radiates equally in all directions?

AM radio signals are broadcast at frequencies between 550 kHz (kilohertz) and 1600 kHz and travel at 3 x 10^8 m/s. a) What is the range of wavelengths for those signals? b) FM frequencies range between 88 MHz (megahertz) and 108 MHz and travel at the the same speed. What is the range of the FM frequencies.

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A dolphin uses echo location to track a fish in the ocean. The speed of sound in the ocean is 1470 m/sec and it takes 0.500 seconds for the sound wave to echo back to the dolphin. How far away is the fish?

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A bat flying at 10.0 m/s is chasing an insect flying in the same direction.  The bat emits a 40.0 kHz chirp and receives back an echo at 40.2 kHz.  How can you tell that the bat will catch the insect without performing any calculations?

Electromagnetic waves can form standing waves. In a standing wave pattern formed from microwaves, the distance between a node and an adjacent antinode is 0.59 cm. What is the microwave frequency?