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You’re a meteorologist specifying a new Doppler radar system that determines the velocity of distant raindrops by reflecting radar signals (which travel at the
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Tutorials in Introductory Physics
- 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.arrow_forwardAM 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 same speed. What is the wavelength range of the FM frequencies.arrow_forwardA person on earth communicating via radio transmission with an astronaut on the moon asks a question. At the time of transmission the moon is 4.00 x 10^5 km from the earth, and the speed of radio waves is 3.00 x 10^8 m/s. How long must the person on earth wait for a response if the astronaut answers 2.50 seconds after the message is received?arrow_forward
- A person on earth communicating via radio transmission with an astronaut on the moon asks a question. At the time of transmission the moon is 4.00 x 10^5 km from earth, and the speed of radio waves if 3.00 x 10^8 m/s. How long must the person on earth wait for a response if the astronaut answers 2.50 s after the message is received?arrow_forwardElectromagnetic waves, which include light, consist of vibrations of electric and magnetic fields, and they all travel at the speed of light, 3.00×108 m/s . Part A: Find the wavelength of an FM radio station signal broadcasting at a frequency of 104 MHz. Part B: X-rays have a wavelength of about 0.30 nm. What is their frequency? Part C: Microwaves with a wavelength of 1.2 mm, left over from soon after the Big Bang, have been detected. What is their frequency? Part D: Sunburn (and skin cancer) is caused by ultraviolet light waves having a frequency of around 1.02×10^16Hz What is their wavelength? Part E: It has been suggested that extraterrestrial civilizations (if they exist) might try to communicate by using electromagnetic waves having the same frequency as that given off by the spin flip of the electron in hydrogen, which is 1.43 GHz. To what wavelength should we tune our telescopes in order to search for such signals? Part F: Microwave ovens cook food with electromagnetic waves of…arrow_forwardThe intensity of the Sun's radiation that reaches a particular point on Earth's atmosphere is 1.06 kW/m2. Convert this to W/cm2. Give your answer with two digits of precision.arrow_forward
- A spaceship is approaching a space station at a speed of 2.25 ✕ 105 m/s. The space station has a beacon that emits green light with a frequency of 5.99 ✕ 1014 Hz. (a) What is the frequency of the beacon observed on the spaceship? (Use c = 2.9979 ✕ 108 m/s for the speed of light. Enter your answer to at least five significant figures.) Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. Hz(b) What is the change in frequency? Hzarrow_forwardThe highest frequency that we can hear is about 20 kHz (2x 10^4Hz). a) Calculate the wavelength (m) associated with this frequency for sound that travels at 345 m/s. b) How long is this in feet? (Roundanswers to the nearest tenth.arrow_forwardA meteorologist for a TV station is using radar to determine the distance to a cloud. He notes that a time of 0.24 ms elapses between the sending and the return of a radar pulse. How far away is the cloud?arrow_forward
- 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.arrow_forwardYou place your ear onto a steel railroad track and hear the sound of a distant train through the rails Δt = 2.7 seconds before you do through the air. The speed of sound in steel is vs = 6100 m/s, and and the air temperature is 36° C. Find the distance, D, to the train in meters.arrow_forwardConsider electromagnetic waves in free space. What is the wavelength of a wave that has the following frequencies? (a) 4.74 x 10¹¹ Hz m (b) 7.52 x 1016 Hz marrow_forward
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