A bat is using echolocation to find insects at night. If the bat emits a high frequency chirp and hears an echo 0.031 s later, how far away is the insect? The temperature of the air that night is 24°C.

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.

A dolphin is swimming at 10 metres per second towards a scuba diver. The dolphin is emitting a ‘welcome’cry which has a frequency of 2980 Hz. What is the frequency that the diver hears underwater?

A baseball hits a car, breaking its window and triggering its alarm which sounds at a frequency of 1270 Hz. What frequency (in Hz) is heard by a boy on a bicycle riding away from the car at 7.95 m/s? Take the speed of sound to be 343 m/s

A Girl Scout is taking a 12.00-km hike to earn a merit badge. While on the hike, she sees a cliff some distance away. She wishes to estimate the time required to walk to the cliff. She knows that the speed of sound is approximately 343 meters per second. She yells and finds that the echo returns after approximately 2.2 seconds. If she can hike 1.00 km in 7.3 minutes, how long would it take her to reach the cliff? At minutes

The pan flute is a musical instrument consisting of a number of closed-end tubes of different lengths. When the musician blows over the open ends, each tube plays a different note. The longest pipe is 0.33 m long. What is the frequency of the note it plays?

A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 7.69  104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect a bat can detect? ?mm

There was an accident and NASA engineers are trying to sort out where two of their Mars Rovers (named 'Tango' and 'Foxtrot') have landed. The engineers know that landing site A is much hotter than landing site B. Unfortunately, the only working sensors on Tango and Foxtrot measure the speed of sound. If Tango measures the speed of sound at its landing site as 240 m/s, while Foxtrot measures speed of sound as 258 m/s at its landing site, where has each rover landed? Tango landed at site A while Foxtrot landed at site B. Tango landed at site B while Foxtrot landed at site A. Both Tango and Foxtrot landed at site A. O Both Tango and Foxtrot landed at site B.

A jetskier is moving at 8.9 m/s in the direction in which the waves on a lake are moving. Each time he passes over a crest, he feels a bump. The bumping frequency is 1.15 Hz, and the crests are separated by 5.8 m. What is the wave speed?

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?