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- Cell phones pick up radio frequencies of approximately 1.85GHz (1.85x109 Hz).a. If the speed of light is ? = 3 × 108m/s, what is the wavelength of these radio waves?b. If I increased the frequency of the radio waves, what would happen to the wavelength?a.) An ambulance moving away from you toward cliff ant 12 m/s emits sound a running velocity at fieauency 1000Hz. Yau are toward the clif freqvenuy with of a Z mls, what you ambulunce? Speed of do hear coming directly from 34 0mls. the sound is aj97z b,)৭27 C.)1034 d.71043 b.) What reflected freauency do you herr cliff? hear for saind from the b.) 1043 i.)972 d.) az7Water ripples are produced by making a cork oscillate up and down at a frequency of 8Hz. The peaks of the ripples are0.02 meters apart. What is the speed of the water ripples? Calculate to one decimal.
- Visible light corresponds roughly to the range of wavelengths from 400 nm (violet) to 700 nm (red). 1 nm = 1 nanometer = 10-9 m. What is the frequency of visible light at a wavelength of 600 nm? f= Hz Enter your answer above using scientific notation with the format x.yzEq = x.yz x109. For example, 1.23 x 10-9 is entered as 1.23E-9. What is the wavelength of a visible light wave with a frequency of 4.64 x 10¹4 Hz? λ = nm12.10. We will learn in Chapter 14 that brightness of light called its intensity I is inversely proportional to the square of the distance r² from the light source. a. As r increases what happens to r² (does it increase or decrease)? What then happens to I (does it increase or decrease)? b. Write an equation that relates the two variables I, r² using an unknown constant k. c. The intensity from a light source is 50 Watts/meter2 when observed from 2 meters away. What is the value and units of the proportionality constant. What is the equation that relates the two variables I, r² using an unknown constant k. d. What intensity do you expect to measure at 10 meters away?Please answer part a. The answer should be 229 Hz. Please put proper formulas and process. Thanks.
- 10 Hz. and travels in the A wave has anplitude of 0.35 m. a frequency of 1.05 positive x direction at the speced of light. 3.00 10 m s. Determine the equation that correctly represents this wave. 3.1.Radio station WTSR broadcasts radio waves have frequency 91.3 MHz (91.3 × 106 Hz). Whatis the wavelength of the radio wave?A. 3.29 mB. 0.0030 mC. 0.30 mD. 329 mConsider a wave described by the wave function y (x,t)%3D0.65m sin 6T m x+ 8TC st+), find the -1 -1 TC 3 frequency of wave? a. 1.33 Hz O b. 2.22 Hz O C. 1.67 Hz O d. 0.75 Hz Next page File Upload - Quiz - 1- -SCL Activity-Section Ir. Maroof) Jump to..
- L 1.1.4 Quz: Wave Interactions Questlon 4 of 10 A sound wave traveling through dry air has a frequency of 16 Hz, a wavelength of 22 m, and a speed of 350 m/s. When the sound wave passes through a cloud of methane, its wavelength changes to 28 m, while its frequency remains the same. What is its new speed? (The equation for the speed of a wave is v = f x X.) A. 450 m/s B. 350 m/s C. 9,800 m/s D. 13 m/s SUBMIT E PREVIOUSIn an attempt to find the frequency of a wave is drawn, the time base was set to 5 ms per division and a trace of the waveform is as shown. What is the frequency? O A. 16.7 Hz O B. 33.3 Hz O C. 50.0 Hz O D. 100 Hz65. A GUNN device has a thickness of 7 um. At what frequency will it oscillate in the transit-time mode? A 1.3 GHZ B. 1.43 GHZ C. 14.3 GHZ D. 143 GHZ