An important news announcement is transmitted by radio waves to people who are 100 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 3.0 m from the newscaster. Who receives the news first? Explain. Take the speed of sound in air to be 343 m/s.

Q: A diathermy machine, used in physiotherapy, generates electromagnetic radiation that gives the…

A: The frequency for diathermy,

Q: What can result from exposing the human body to frequencies between 5Hz to 8Hz

A: The question requires to determine the effect in human body when exposed to frequency between 5Hz to…

Q: A spaceship is approaching a space station at a speed of 2.25 ✕ 105 m/s. The space station has a…

A:

Q: Q3 / In order to determine voice traffic on a line, we collected the following data during a period…

A:

Q: communicating with an astronaut on the moon, 3.8  108 m from earth, what is the minimum time delay…

A: Spped = distance /time Time = distance /speed

Q: Approximately how long would it take a telephone signal to travel 2650 mi from coast to coast across…

A: Speed of light in air is 3×108 m/s It is given Telephone signals travel at about the speed of…

Q: A pulsar is a type of rotating neutron star that emits a beam of electromagnetic radiation. Imagine…

A: Due to Doppler Effect the wavelength observed will be smaller than the wavelength emitted at the…

Q: What is the wavelength of a radio wave that has a frequency of 1.59 x 10^8 Hz?       1.885 m…

A: Given data:  A radio wave Frequency (f) = 1.59×108 Hz Required: The wavelength (λ)

Q: (a) The distance to a star is approximately 5.50 x 10¹8 m. If this star were to burn out today, in…

A:

Q: If the distance from an antenna on Earth to a geosynchronous communications satellite is 26000…

A: Given data: Distance (d) = 26000 miles 1 mile = 1.61 km = 1.61 × 103 m Speed radio wave (v) = 3.0 ×…

Q: The speed of all electromagnetic waves in empty space is 3.00 × 108 m/s. a) What is the wavelength…

A: Given :    speed of electromagnetic waves in space is 3×108ms-1       Relation between , wavelength…

Q: A speeder tries to explain to the police that the yellow warning lights she was approaching on the…

A:

Q: While driving at a constant speed of 79 km/h, you are passed by a car traveling at 122 km/h. If the…

A:

Q: A police car’s radar gun emits microwaves with a frequency of f1 = 8.70 GHz. The beam reflects from…

A: Given : f1 = 8.70 GHz = 8.70 × 109 Hz v = 44.5 m/s

Q: An electromagnetic wave with frequency 7.8x10^14 Hz travels with a speed of 1.5x10^8 m/s in a…

A:

Q: A) Suppose a star is 4.15 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward…

A: We know that Time (t) = distance / speedAnd speed of waves and light is 3 x 10^8 m/st = 4.15 x 10^18…

Q: Radio waves travel at the speed of light, 3.0 x 108 m/s. The wavelength of a radio wave received at…

A:

Q: The rainbow of visible colors in the electromagnetic spectrum varies continuously from the longest…

A: we know : c=λf or f=cλ And C =3×108 m/s 1nm = 10-9 m

Q: The frequency used in microwave diathermy is O 2450 MHz 1 MHz 5 MHz O 14 MHz O 20 kHz

A:

Q: As space exploration increases, means of communicationwith humans and probes on other planets are…

A: Given

Q: A radio wave has a speed of 3 x 108 m/s and a frequency of 95 MHz. What is the wavelength? O 7.79 m…

A: Solution: Given that speed v = 3x108 m/s frequency f = 95 Mhz

Q: Processes at the center of a nearby galaxy cause the emission of electromagnetic radiation at a…

A:

Q: All electromagnetic radiation moves at the same speed, which is the speed. In a vacuum, the speed of…

A: Given value--- speed of radiation = 3 × 108 m/s. distance = 149.6 million km. We have to find---…

Q: What is the wavelength of a radio wave that has a frequency of 9.19 x 10^8 Hz? O 0.326 m O 0.163 m O…

A:

Q: Suppose a star is 6.42 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth…

A: Suppose a star is 6.42 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth…

Q: A spaceship is approaching a space station at a speed of 3.30 ✕ 105 m/s. The space station has a…

A: in this problem, the given data-   the speed of spaceship is v=3.30×105m/s frequency of light f=…

Q: About 1,336 W/m2 of electromagnetic energy reaches the upper atmosphere of the Earth from the Sun,…

A: Given:-                   About 1,336 W/ m 2 of electromagnetic energy reaches the upper atmosphere…

Q: When the NASA Rover Spirit successfully landed on Mars in January of 2004, Mars was 170.2 × 106 km…

A: Given:  Distance of Mars from Earth, km After 21 days, km To find:  A) Time for one-way transmission…

Q: A radar used to detect the presence of aircraft receives a pulse that has reflected off an object 9…

A: Given,Time taken to receive the pulse after transmission (t)=  9 × 10-5 s

Q: a) The distance to a star is approximately 4.94 ✕ 1018 m. If this star were to burn out today, in…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: dcast at a frequency of 119 kHz. what is the wavelength of the wave? (Speed of light in vacuum is…

A: The frequency of the A radio transmitter broadcast f = 119 kHz  The Speed of light in vacuum is v =…

Q: In Microwave diathermy The frequency used is .a 750MHZ .b 900MHZ .c 800MHZ .d 600MHZ

A: Microwave diathermy is used to heat superficial muscles and joints such as the shoulder. It is also…

Q: (a) Suppose a star is 7.61 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward…

A: Speed of electromagnetic wave is, C = 3×108 m/s (a) Distance of the star from earth, S = 7.61 ✕ 1018…

Q: A father and his daughter are interested in the same baseball game. The father sits next to his…

A: We have to determine weather the daughter or the Father hears the home run first.