College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Chapter 24, Problem 13PE
A radar used to detect the presence of aircraft receives a pulse that has reflected off an object
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A radar used to detect the presence of aircraft receives a pulse that has reflected off an object 5.5 × 10-5 s after it was transmitted.
What is the distance in m from the radar station to the reflecting object?
A radar used to detect the presence of aircraft receives a pulse that has reflected off an object 5 ✕ 10−5 s after it was transmitted. What is the distance (in m) from the radar station to the reflecting object?
What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that puts 374 J of energy into a circular spot 2.00 mm in diameter in 4.67 s? Compare this to the average intensity of sunlight (about 700 W/m2).
answer blank times 10^7
Chapter 24 Solutions
College Physics
Ch. 24 - The direction of the electric field shown in each...Ch. 24 - Is the direction of the magnetic field shown in...Ch. 24 - Why is the direction of the current shown in each...Ch. 24 - In which situation shown in Figure 24.24 will the...Ch. 24 - In which situation shown in Figure 24.25 will the...Ch. 24 - Should the straight wire antenna of a radio he...Ch. 24 - Under what conditions might wires in a DC circuit...Ch. 24 - Give an example of interference of electromagnetic...Ch. 24 - Figure 24.26 shows the interference pattern of two...Ch. 24 - Can an antenna be any length? Explain your answer.
Ch. 24 - If you live in a region that has a particular TV...Ch. 24 - Explain why people who have the lens of their eye...Ch. 24 - How do ?uorescent soap residues make clothing look...Ch. 24 - Give an example of resonance in the reception of...Ch. 24 - Illustrate that the size of details of an object...Ch. 24 - Why don't buildings block radio waves as...Ch. 24 - Make a list of some everyday objects and decide...Ch. 24 - Your friend says mat more patterns and colors can...Ch. 24 - The rate at which information can be transmitted...Ch. 24 - Give an example of energy carried by an...Ch. 24 - In an MRI scan, a higher magnetic field requires...Ch. 24 - Laser vision correction often uses an excimer...Ch. 24 - Verify that the correct value for the speed of...Ch. 24 - Show that, when SI units for 0 and 0 are entered,...Ch. 24 - What is the maximum electric field strength in an...Ch. 24 - The maximum magnetic field strength of an...Ch. 24 - Verify the units obtained for magnetic field...Ch. 24 - (a) Two microwave frequencies are authorized for...Ch. 24 - (a) Calculate the range of wavelength for AM radio...Ch. 24 - A radio station utilizes frequencies between...Ch. 24 - Find the frequency range of visible light, given...Ch. 24 - Combing your hair leads to excess electrons on the...Ch. 24 - Electromagnetic radiation having a 15.0m...Ch. 24 - Approximately what is the smallest detail...Ch. 24 - A radar used to detect the presence of aircraft...Ch. 24 - Some radar systems detect the size and shape of...Ch. 24 - Determine the amount of time it takes for X-rays...Ch. 24 - If you wish to detect details of the size of atoms...Ch. 24 - If the Sun suddenly turned off, we would not know...Ch. 24 - Distances in space are often quoted in units of...Ch. 24 - A certain 50.0-Hz AC power line radiates an...Ch. 24 - During normal bee?ng, the heat creates a maximum...Ch. 24 - (a) The ideal size (most efficient) for a...Ch. 24 - (a) What is the wavelength of 100MHz radio waves...Ch. 24 - (a) What is the frequency at the 193-nm...Ch. 24 - TV-reception antennas for VHF are constructed with...Ch. 24 - Conversations with astronauts on lunar walks had...Ch. 24 - Lunar astronauts placed a reflector on the Moon's...Ch. 24 - Radar is used to determine distances to various...Ch. 24 - Integrated Concepts (a) Calculate the ratio of the...Ch. 24 - Integrated Concepts (a) Calculate the rate in...Ch. 24 - What is the intensity of an electromagnetic wave...Ch. 24 - Find the intensity of an electromagnetic wave...Ch. 24 - Assume the helium-neon lasers commonly used in...Ch. 24 - An AM radio transmitter broadcasts 50.0 kW of...Ch. 24 - Suppose the maximum safe intensity of microwaves...Ch. 24 - A 2.50-m-diameter university communications...Ch. 24 - Lasers can be constructed that produce an...Ch. 24 - Show that for a continuous sinusoidal...Ch. 24 - Suppose a source of electromagnetic waves radiates...Ch. 24 - Integrated Concepts An LC circuit with a 5.00pF...Ch. 24 - Integrated Concepts What capacitance is needed in...Ch. 24 - Integrated Concepts Police radar determines the...Ch. 24 - Integrated Concepts Assume the mostly infrared...Ch. 24 - Integrated Concepts On its highest power se1ting,...Ch. 24 - Integrated Concepts Electromagnetic radiation from...Ch. 24 - Integrated Concepts A 200-turn flat coil of wire...Ch. 24 - Integrated Concepts If electric and magnetic field...Ch. 24 - Unreasonable Results A researcher measures the...Ch. 24 - Unreasonable Results The peak magnetic field...Ch. 24 - Unreasonable Results An LC circuit containing a...Ch. 24 - Unreasonable Results An LC circuit containing a...Ch. 24 - Create Your Own Problem Consider electromagnetic...Ch. 24 - Create Your Own Problem Consider the most recent...
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- A device called an insolation meter is used to measure the intensity of sunlight. It has an area of 100 cm2 and registers 6.50 W. What is the intensity in W/m2?arrow_forwardThe electric field of an electromagnetic wave traveling in vacuum is described by the following wave function: E =(5.00V/m)cos[kx(6.00109s1)t+0.40] j where k is the wavenumber in rad/m, x is in m, t s in Find the following quantities: (a) amplitude (b) frequency (c) wavelength (d) the direction of the travel of the wave (e) the associated magnetic field wavearrow_forwardA radar used to detect the presence of aircraft receives a pulse that has reflected off an object 6×10−5 s after it was transmitted. What is the distance from the radar station to the reflecting object?arrow_forward
- It takes 3.8 x 10^-5 s for a pulse of radio waves from a radar to reach a plane and bounce back.How far is the plane from the radar?arrow_forwardA Bangladeshi submarine and a submarine of Pakistan move towards from each other during maneuversin motionless water in the Bay of Bengal. The Bangladeshi sub moves at speed VB=54.00 km/h, and thePakistan sub at 63.00km/h. The Pakistan sub sends out a sonar signal at 1.250*104 Hz. Sonar waves travelat 6470km/h. (a) What is the signal’s frequency as detected by the Bangladeshi sub? (b) What frequencyis detected by the Pakistan sub in the signal reflected back to it by the Bangladeshi sub? (c) Whatfrequency is detected by the Bangladeshi sub in the signal if it reflected back thrice time to it by thePakistan sub?arrow_forwardIn general, X-rays have wavelengths between 10 nm and 0.01 nm. For an X-ray with a wavelength of 1 nm, what is the corresponding frequency? The speed of light is 3 × 108 m/s. The frequency of the X-ray is _____ × 1016 Hzarrow_forward
- A 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_forwardA radar pulse returns to the transmitter–receiver after a total travel time of 4.00 3 1024 s. How far away is the object that reflected the wave?arrow_forwardRemember the wave equation is y = lambda For electromagnetic waves traveling in a vacuum, they all travel at the speed of light =c=2.998*10^ 8 s/m. A water wave (a mechanical wave, not an electromagnetic wave!) has a frequency of 20 Hz and a wavelength of 0.1 m. Calculate the speed of this wave. 1/2 * m / s; 6m / s; 3m / s; 2m / s 4 m / sarrow_forward
- A radar pulse returns 4.0x 10-8 s after it was sent out and reflected by an object what is the total distance in meters that the radar pulse travelsarrow_forwardA space probe emits a radio signal toward Earth at regular time intervals. One such pulse arrives on Earth 2.92 s after it is emitted from the probe. Calculate the approximate distance from the Earth to the probe. a. 3.50 × 108 m b. 7.40 × 108 m c. 6.94 × 108 m d. 8.76 × 108 m e. 4.12 × 108 marrow_forwardMagnetic field intensity of a propagating wave in free space is given by H =0.3 cos(4*108t+ 2y) ax V/m the plot of H versus y at time, t = T/8arrow_forward
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