A stationary source produces a sound wave at a frequency of 100 Hz. The wave travels at 1125 feet per second. A car is moving toward the sound
source at a speed of 200 feet per second.
Item 3
What is the wavelength of the stationary sound source and the wavelength that a person in the car perceives?
i just took the test and the correct answer is
wavelength of the stationary source: 11.25 ft; perceived wavelength: 9.25 ft
1.The image moves behind the curved mirror
2.Light bends due to the difference in the speed of light in air and glass.
3.Light waves do not require a medium to propagate.
4.The frequency of blue light is greater than that of yellow light, while the speeds of both colors of light are the same.
5.wavelength of the stationary source: 11.25 ft; perceived wavelength: 9.25 ft
6.standing waves
7.the vertical distance from the crest or trough of a wave to the equilibrium
8.0.2 seconds
9.The speed of sound increases as the density of water increases.
10.The speed decreases by 25% because speed and wavelength are directly proportional.
11.The wavelength of the wave increases
12.The frequency remains constant.
13.λA=13λB
14.1s and 0s
15.Some film methods allow you to print a picture from anywhere without electricity.
16.Results can be quickly and accurately counted and shared.
17.We can make the claim that light can be reflected, which is justified by the reflection seen on the water as well as the colors seen in the photo.Therefore one of the aspects of the picture that illustrate behaviors of light is how the light makes a reflection on the water so it has a mirrored effect, the other aspect of the picture is how the light can reflect off of something and have the same exact image copied on to water and make it look like the image was flipped.
18.A harmonic is a wave with a frequency that is a positive integer multiple of the frequency of the original wave whereas, resonance frequency is the frequency at which the oscillation reaches to its maximum point. The lowest resonant frequency is known as the fundamental, while on the other hand, the higher resonant frequencies are called overtones. All resonant frequencies are multiples of the fundamental, and are called harmonics.
19.The frequency and wavelength depend on the medium through which the sound passes and they are both greater in the guitar string than in air as the string is denser than the air. So the sound travles faster through the guitar string.
20.An online version is the availability of the application on the web and the internet.The online version of the logo designer is advantageous as it provides more customization choices. What is logo designing? A logo design is a method to create logos that represent the brand of the business corporation or any other organization, it represents the company and brand.
do not copy 17-20 you might get a 0