A car moving at 150km/h (93 mi/h) is approaching a stationary police car whose radar speed detector operactes at frequency of 15 GHz. What frequency change is found by the speed detector?

Q: Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 2.5…

A: Given Power                                    = 2.5 MW The distance of nearby star  = 44 ly

Q: Lunar astronauts placed a reflector on the Moon’s surface, from which a laser beam is periodically…

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Q: Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a…

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Q: How long does it take for the EM wave to reach me if I am standing 15m from the source?

A: Given data:  Distance (d) = 15 m Required: The time taken by EM wave to travel 15 m

Q: 1) You are in trouble and the highway patrol has just stopped you for speeding. The police officer…

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Q: A minivan moving at 150 m/s passes an unmarked state police car moving at 80 m/s. The…

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Q: ull MY MAXIS ? 11:01 PM 2% A elearning.utm.my Interaction between electromagnetic radiation (EMR)…

A: 1. The given graph is power v/s time. Power is energy per unit time. power (in watt)=Energy…

Q: Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a…

A: Given data: The frequency of source is fs=24 GHz. The speed of car is vs=65 mph.

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

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Q: If electric and magnetic field strengths vary sinusoidally in time, being zero at t=0, then E=E0 sin…

A: Given: The electric field E=Eosin2πft The magnetic field B=Bosin2πft The frequency f = 1.00 GHz.

Q: What is the wavelength (in meters) of an em wave with a freuqency of 86.3 GHz (1 GHz = 109 Hz)?

A: Given : f = 86.3 GHz = 86.3 x 109 Hz

Q: The magnetic field of a wave propagating through a certain nonmagnetic material in the positive y…

A: Amplitude (A) = 30 mAmFrequency (f) = 1082π Hz wavelength (λ) = 12.6 m

Q: QUESTION 3: State the transmission power record if the incident power is assumed the total power…

A: The incident power is assumed to be total power received.

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

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

A: Given

Q: What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 94.0%…

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Q: A certain star is 15.7 million light-years from Earth. The intensity of the light that reaches Earth…

A: GivenDistance between star and earth, r=15.7 million light yearThe intensity of light that reaches…

Q: Police radar guns measure the speed of moving vehicles bytransmitting electromagnetic waves at a…

A: Write the expression for shift in frequency.

Q: Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a…

A: Given:Police radar transmits at a frequency (ftransmited) =22.4 GHz or 22.4×109 HzCar moving toward…

Q: Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 1.0…

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Q: The image attached is a neat copy of a photo of an electricity meter for a domestic solar array. The…

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Q: I tune my radio to WBEN-AM, 930kHz. What is the length of its wavelength, λ? λ =…

A: Given data: Frequency of radio wave (f) = 930 kHz Required: Wavelength (λ)

Q: An important news announcement is transmitted by radio waves to people sitting next to their radios…

A: Given data The transmitted distance of the radio wave from the station is xfar = 100 km. The…

Q: The AM radio band in a particular area has a frequency range of 554 kHz to 1620 kHz. How long is the…

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Q: When electromagnetic waves strike an area of an object’s surface for a given time, energy is…

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Q: Given that the intensity of energy arriving from the sun, as measured in space, just outside the…

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Q: A radio station operates at 106 Hz and located 322 km away from you. How long does it take for an…

A: Given data: The distance from the station to the person, d=322 km.   Express the relation for the…

Q: At what distance from a 125 W electromagnetic-wave point source does Emax = 15.1 V/m?

A: We know ,the maximum electric field is given by

Q: answer question 7

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Q: use ɛ=ɛ_0,µ=p_0,a=5mho/m Sea water has a conducting medium What is the speed of the electromagnetic…

A: The electromagnetic waves are nothing but oscillating electric and magnetic fields traveling in…

Q: An new oven cooks a small cake with visible light. If a pan of food (area = 0.036 m2) is 0.475 m…

A: The energy be given as, Where, E is the energy. P be defined as power.

Q: During normal beating of the heart, the maximum value of the oscillating potential difference across…

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Q: (a) Calculate the wavelength of the radio waves from WWVB. (b) Estimate the error that the travel…

A: a) The expression for find wavelength is λ=cf Substitute values in the above equation…

Q: Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 2.5…

A: The given distance in the light-years unit can be converted into meter using standard relation as…

Q: If electric and magnetic field strengths vary sinusoidally in time, being zero at t=0, then E=E0 sin…

A: Equation for electric field E=E0sin2πft Equation for magnetic field B=B0sin2πft Frequency of the…