Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength 1.50 µm . If the lamp’s 200-W output is focused on a person’s shoulder, over a circular area 25.0 cm in diameter, what is the intensity in W/m2?

Q: Radio waves transmitted through space at 3.00 X 108 m/s by the Voyager spacecraft have a wavelength…

A:

Q: What frequency is received by a person watching an ambulance "B" moving away from him at 162.5 km/h…

A: speed of sound = 339 m/s frequency emitted = 740 Hz speed of B = 162.5 km/hr  = 45.138 m/s

Q: A 33 kHz soundwave travels in air at v=355 m/s What is the temperature of the air through which it…

A: What is the velocity and wavelength?   Given data:Frequency of the soundwave, f  = 33 kHz = 33000…

Q: Radio waves transmitted through space at 3.00 x 10° m/s by the Voyager spacecraft have a wavelength…

A: The radio waves transmitted through space by voyager spacecraft . The wavelength of the radio waves…

Q: The intensity of sound waves is proportional to the square of the frequency. True O False

A: Explanation -                         Intensity of sound wave is defined as the total power carried…

Q: Water waves in the sea are observed to have a wavelength of 300 m and a frequency of 0.07 Hz. The…

A: Given that, Wavelength (λ)= 300 m Frequency (f)= 0.07 Hz Let the velocity of the wave be v We know…

Q: The speed of sound in air is 340 m/s. What is the frequency of a sound wave with a wavelength of 1.5…

A: Given,speed of sound (V0=340 m/swavelength (λ)  =1.5 mwe want to find frequency (f)

Q: A sound wave moves through a medium with density 480kg/m^3 when it encounters a medium with density…

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Q: Radio waves transmitted through space at 3.00X108 m/s by the Voyager spacecraft have a wavelength of…

A: The frequency of the radio waves can be given by f=cλ

Q: A wave of wavelength 0.60cm is produced in air and it travels at a speed of 300m/s. Will it be…

A: Given, wavelength = 0.006m            speed = 300 m/s

Q: 9. A sound wave moves through a medium with density 560ˍkg/m³ when it encounters a medium with…

A: Given value--- density of medium 1 = 560 kg/m3.  density of medium 2 = 1500 kg/m3.  We have to…

Q: What is the wavelength of the waves you create in a swimming pool, if you splash your hand at a rate…

A: Given:  frequency, f = 2 Hz  wave velocity, v = 0.640 m/s

Q: The sound level 8.25 m from a loudspeaker, placed in the open, is 115 dB. What is the acoustic power…

A: Given data *The distance of sound level from the loudspeaker is r = 8.25 m *The sound level when…

Q: Red Light in air has a frequency of 4.3 x 104 Hz. What is the speed in glass for red light if it has…

A:

Q: There was an accident, and NASA engineers are trying to sort out where two of their Mars Rovers,…

A: Tango measures speed of air which is less than that measured by Foxtrot. When the temperature of…

Q: A sound wave radiates from a source uniformly in all directions. If the power of the sound source is…

A:

Q: An echo is heard in 3 s. What is the distance of the reflecting surface from the source, given that…

A: Given : Speed of sound (v) = 342 ms-1 Echo returns in time (t) = 3 s

Q: Up to which frequency the ground wave propagation is used? 30MHZ 2GHZ 2MHZ 30GHZ

A: Ground waves are used for long distance communication between the frequency range of 3 to 30 MHz…

Q: The intensity of light at a distance x meters from a source is k modeled by the function R given by…

A:

Q: The average depth of penetration of an ultra-sound wave of the frequency f = 800 kHz in tissue is 4…

A: Given The initial intensity of the wave is I0=10 W/m2. The skin depth or average depth of…

Q: A 3.4 Hz continuous wave travels on a Slinky. If the wavelength is 0.69 m, what is the speed of…

A:

Q: Speed of sound in air = 343 m/s Speed of light = 3×108 m/s  A few periodic sound waves of…

A: (a) Given data:                       Frequency = 20 kHz = 20×103 Hz      Formula :…

Q: The speed of sound in air is given as 340 m/s. What is the wave length of a 318 frequency wave?

A:

Q: A wave is generated on a 9 m long taut wire. The total energy carried by the wave is E = 600 mJ. If…

A: The oscillations are the basic cause of waves. The wave is only produced when we have something of…

Q: A 221HZ sound is played outside. What is the temperature outside in degrees Celsius if the…

A:

Q: A wave has velocity (240m / s) and wavelength (3.2), so the frequency of the wave is equal to: 768Hz…

A: Given:         velocity of wave (v)=240m/s         wavelength of wave(λ)=3.2mwe know that v=λf

Q: Magnetic field intensity of a propagating wave in free space is given by H =0.3 cos(4*108t+ 2y) ax…

A:

Q: A bell emits sound energv uniformly in all directions at a rate of 4.00 x 103 w. What is the…

A: Given that, Sound Energy emitted radiated at rate that is power(P) = 4 × 10^(-3) W  distance (d) =…

Q: The resultant intensity due to the destructive interference of two waves is 36 W/m2. Evaluate the…

A:

Q: The resultant intensity due to the constructive interference of two waves is 196 W/m2 . Evaluate the…

A:

Q: Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength of…

A:

Q: ssible for a sound wave to have a sound level of

A: A sound is a vibration that propagates through a medium in the form of a mechanical wave. The medium…

Q: An amplitude modulated wave is represented by the expression vm = 5(1+0.6 cos 6280r) sin(211x10*r)…

A:

Q: The echo of a sound wave is due to of the sound wave. A reflection O B absorption C transmission…

A: The echo of sound  happens when the sound waves are obstructed by an object and is reflected back.…

Q: What is the wavelength of a 256-hertz sound wave in air at 31 degrees Celsius? b Od 0.773 m 8.53 *…

A:

Q: (2) A 62 W (60 J/s) light bulb is 8.5% efficient, i.e. only 8.5% of the electrical energy it…

A:

Q: A 4.2 Hz continuous wave travels on a Slinky. If the wavelength is 0.61 m, what is the speed of…

A:

Q: 274. In real life, most digital signals have bandwidth a. infinite b. Zero c. Constant d. None of…

A: Bandwidth: Bandwidth is defined as the difference between the upper and lower frequencies in a…

Q: If y = 0.02 sin (30 x − 400 t) (SI units), the frequency of the wave is  what

A: wave equation y = 0.02 sin (30 x − 400 t)

Q: What is the wavelength of sound of frequency 1.2kHz? (The speed of sound is 343m/s)

A: Given data: Frequency (f) = 1.2 kHz Speed (v) = 343 m/s Required: Wavelength (λ)

Q: A 4.4 Hz continuous wave travels on a Slinky. If the wavelength is 0.57 m, what is the speed of…

A: We know thatV=f×λHereV=Speed of wavef=Frequencyλ=Wavelength

Electromagnetic Waves

Electromagnetic waves are waves that consist of magnetic field and electric field components perpendicular to each other. These field components are also perpendicular to the direction of propagation of the wave.