EP PHYSICS F/SCI.+ENGR.W/MOD..-MOD MAST
4th Edition
ISBN: 9780133899634
Author: GIANCOLI
Publisher: PEARSON CO
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 31, Problem 59GP
The metal walls of a microwave oven form a cavity of dimensions 37 cm × 37 cm × 20 cm. When 2.45-GHz microwaves are continuously introduced into this cavity, reflection of incident waves from the walls set up standing waves with nodes at the walls. Along the 37-cm dimension of the oven, how many nodes exist (excluding the nodes at the wall) and what is the distance between adjacent nodes? [Because no heating occurs at these nodes, most microwaves rotate food while operating.]
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A laser beam at a wavelength of 1.11 μm is coupled into an optic fiber, resulting in 138.2 mW of light inside the fiber initially. The fiber is 4.75 km long and has an absorption coefficienct of 1.562 dB/km. What light power, in mW, is at the end of the fiber?
Two identical short dipole antennas are driven in phase with each other with equal strength and
emit readiation at a wavelength of = 0.1 meters.
One antenna is oriented in the y-direction and is located at (x,y,z) = (0,0,0). The other antenna
is oriented in the z-direction and is located at (x,y,z) = (d,0,0) where d > 0.
What is the smallest value of d for which the radiated far-field at a point (x.y,z) = (X, ,0, 0), x,>>
d, and A, is circularly polarized?
What happens to the polarization if d is now doubled?
Scientists are working on a new technique to kill cancer cells by zapping them
with ultrahigh-energy (in the range of 1.00×1012 W) pulses of light that last for
an extremely short time (a few nanoseconds). These short pulses scramble the
interior of a cell without causing it to explode, as long pulses would do. We can
model a typical such cell as a disk 5.00 μm in diameter, with the pulse lasting
for 4.00 ns with an average power of 2.00×1012 W. We shall assume that the
energy is spread uniformly over the faces of 100 cells for each pulse.
I 1.00×1021 W/m²
Submit Previous Answers
Part C
Correct
What is the maximum value of the electric field in the pulse?
ΜΕ ΑΣΦ
Emax
Submit
Request Answer
Part D
?
V/m
What is the maximum value of the magnetic field in the pulse?
ΜΕ ΑΣΦ
Bmax =
Submit
Request Answer
?
T
Chapter 31 Solutions
EP PHYSICS F/SCI.+ENGR.W/MOD..-MOD MAST
Ch. 31.4 - Prob. 1AECh. 31.6 - Return to the Chapter-Opening Question, page 812,...Ch. 31.6 - What are the frequencies of (a) an 80-m-wavelength...Ch. 31.6 - Prob. 1DECh. 31.6 - If you are on the phone via satellite to someone...Ch. 31.6 - If your voice traveled as a sound wave, how long...Ch. 31 - An electric field E points away from you, and its...Ch. 31 - Prob. 2QCh. 31 - Prob. 3QCh. 31 - The electric field in an EM wave traveling north...
Ch. 31 - Is sound an electromagnetic wave? If not, what...Ch. 31 - Can EM waves travel through a perfect vacuum? Can...Ch. 31 - When you flip a light switch, does the overhead...Ch. 31 - Are the wavelengths of radio and television...Ch. 31 - What does the wavelength calculated in Example...Ch. 31 - Prob. 11QCh. 31 - In the electromagnetic spectrum, what type of EM...Ch. 31 - Can radio waves have the same frequencies as sound...Ch. 31 - Discuss how cordless telephones make use of EM...Ch. 31 - Can two radio or TV stations broadcast on the same...Ch. 31 - If a radio transmitter has a vertical antenna,...Ch. 31 - The carrier frequencies of FM broadcasts are much...Ch. 31 - A lost person may signal by flashing a flashlight...Ch. 31 - Determine the rate at which the electric field...Ch. 31 - Prob. 2PCh. 31 - At a given instant, a 2.8-A current flows in the...Ch. 31 - Prob. 4PCh. 31 - Prob. 5PCh. 31 - Prob. 6PCh. 31 - Prob. 7PCh. 31 - If the electric field in an EM wave has a peak...Ch. 31 - Prob. 9PCh. 31 - In an EM wave travelling west, the B field...Ch. 31 - Prob. 11PCh. 31 - Consider two possible candidates E(x, t) as...Ch. 31 - What is the frequency of a microwave whose...Ch. 31 - (a) What is the wavelength of a 25.75 109 Hz...Ch. 31 - How long does it take light to reach us from the...Ch. 31 - An EM wave has frequency 8.56 1014Hz. What is its...Ch. 31 - Electromagnetic waves and sound waves can have the...Ch. 31 - Prob. 18PCh. 31 - Prob. 19PCh. 31 - Prob. 20PCh. 31 - What is the minimum angular speed at which...Ch. 31 - Prob. 22PCh. 31 - The magnetic field in a traveling EM wave has an...Ch. 31 - Prob. 24PCh. 31 - A spherically spreading EM wave comes from a...Ch. 31 - Prob. 26PCh. 31 - Prob. 27PCh. 31 - A 15.8-mW laser puts out a narrow beam 2.00 mm in...Ch. 31 - Estimate the average power output of the Sun,...Ch. 31 - Prob. 30PCh. 31 - How practical is solar power for various devices?...Ch. 31 - The Arecibo radio telescope in Puerto Rico can...Ch. 31 - Estimate the radiation pressure due to a 75-W bulb...Ch. 31 - Prob. 35PCh. 31 - Prob. 36PCh. 31 - What size should the solar panel on a satellite...Ch. 31 - What is the range of wavelengths for (a) FM radio...Ch. 31 - Estimate the wavelength for 1.9-GHz cell phone...Ch. 31 - The variable capacitor in the tuner of an AM radio...Ch. 31 - A certain FM radio tuning circuit has a fixed...Ch. 31 - A satellite beams microwave radiation with a power...Ch. 31 - A 1.60-m-long FM antenna is oriented parallel to...Ch. 31 - Who will hear the voice of a singer first: a...Ch. 31 - Prob. 45GPCh. 31 - Prob. 46GPCh. 31 - A radio voice signal from the Apollo crew on the...Ch. 31 - Cosmic microwave background radiation fills all...Ch. 31 - What are E0 and B0 2.00 m from a 75-W light...Ch. 31 - Prob. 50GPCh. 31 - Prob. 51GPCh. 31 - How large an emf (rms) will he generated in an...Ch. 31 - The average intensity of a particular TV stations...Ch. 31 - A radio station is allowed to broadcast at an...Ch. 31 - A point source emits light energy uniformly in all...Ch. 31 - Suppose a 35-kW radio station emits EM waves...Ch. 31 - What is the maximum power level of a radio station...Ch. 31 - In free space (vacuum), where the net charge and...Ch. 31 - The metal walls of a microwave oven form a cavity...Ch. 31 - Imagine that a steady current I flows in a...Ch. 31 - Prob. 61GPCh. 31 - Suppose that a right-moving EM wave overlaps with...Ch. 31 - The electric and magnetic fields of a certain EM...
Additional Science Textbook Solutions
Find more solutions based on key concepts
An LC circuit in an AM tuner (in a car stereo) uses a coil with an inductance of 2.5 mH and a variable capacito...
University Physics Volume 2
The speed of the person sitting on the chair relative to the chair and relative to Earth.
Conceptual Physics (12th Edition)
Biologists measure the total current due to potassium ions moving through the membrane of a rock crab neuron ce...
Essential University Physics: Volume 2 (3rd Edition)
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
Review Question 23.9 Why is saying that a telescope magnifies simultaneously a correct and an incorrect stateme...
College Physics
Write the abbreviation for each quantity.
24. 15 decilitres
Applied Physics (11th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of this signal if it is received on a planet orbiting Proxima Centuri, the closest star to our Sun, at 4.243 ly away?arrow_forwardA microwave source produces pulses of 21.0 GHz radiation, with each pulse lasting 1.00 ns. A parabolic reflector with a face area of radius R = 8.50 cm is used to focus the microwaves into a parallel beam of radiation, as shown in the figure below. The average power during each pulse is 25.0 kW. (a) What is the wavelength of these microwaves? cm (b) What is the total energy contained in each pulse? μJ (c) Compute the average energy density inside each pulse. mJ/m³ 3 (d) Determine the amplitude of the electric field and magnetic field in these microwaves. Emax kv/m μT B. max (e) Compute the force exerted on the surface during the 1.00 ns duration of each pulse. Assume this pulsed beam strikes an absorbing surface. UNarrow_forwardA microwave source produces pulses of 13.0 GHz radiation, with each pulse lasting 1.00 ns. A parabolic reflector with a face area of radius R = 7.50 cm is used to focus the microwaves into a parallel beam of radiation, as shown in the figure below. The average power during each pulse is 20.0 kW. (a) What is the wavelength of these microwaves? cm (b) What is the total energy contained in each pulse? (c) Compute the average energy density inside each pulse. mJ/m³ (d) Determine the amplitude of the electric field and magnetic field in these microwaves. E kv/m μT max (e) Compute the force exerted on the surface during the 1.00 ns duration of each pulse. Assume this pulsed beam strikes an absorbing surface. μN max B μJ = =arrow_forward
- If electric and magnetic field strengths vary sinusoidally in time, being zero at t=0, then E=E0 sin 2πft and B=B0 Sin 2πft . Let f = 1.00 GHz here When are the field strengths first zero?arrow_forwardProblem 4: Consider the 100-MHz radio waves used in an MRI device. Part (a) What is the wavelength, in meters, of these radio waves? Part (b) If the frequencies are swept over a ±14 MHz range centered on 100 MHz, what is the minimum, in meters, of the range of wavelengths emitted? Part (c) What is the maximum, in meters, of this wavelength range?arrow_forwardA car is speeding away from a policeman at 45 m/sec. Police radar operates at 10 GHz. The frequency of the radar signal reflected from the car is (a) 3.0 kHz more than 10 GHz (b) 1.5 kHz less than 10 GHz (c) 1.5 kHz more than 10 GHz (d) 3.0 kHz less than 10 GHz (e) 1.3 kHz less than 10 GHzarrow_forward
- A laser can suspend a small glass sphere in Earth's gravitational field, g = 9.80 m/s2. Assume that the suspended sphere is made of perfectly absorbing black glass. The sphere has a radius of 0.560 mm and a density of 0.190 g/cm3. Determine the radiation intensity needed to keep the small glass sphere suspended. (answer in kW / cm^2)arrow_forwardThe magnetic field of a sinusoidal EM wave satisfies the following equationB(t , x) = (4.5 uT) sin[2.81*10^15(rad/s)t + 9.37 * 10^6 (rad/m)x] the EM wave falls where on the electromagnetic spectrum? Please give detailed steps on how you solved this.arrow_forwardA microwave source produces pulses of 16.0-GHz radiation, with each pulse lasting 1.00 ns. A parabolic reflector with a face area of radius 4.50 cm is used to focus the microwaves into a parallel beam of radiation, as shown in figure below. The average power during each pulse is 30.0 KW. (a) What is the wavelength of these microwaves? (b) What is the total energy contained in each pulse? (c) Compute the average energy density inside each pulse. IL (a) Determine the amplitude of the electric field and magnetic field in these microwaves. Emax = kV/m μT Bmax = (e) Assuming that this pulsed beam strikes an absorbing surface, compute the force exerted on the surface during the 1.00-ns duration of each pulse. μνarrow_forward
- A 0.5-MHz antenna carried by an airplane flying over the ocean surface generates a wave that approaches the water surface in the form of a normally incident plane wave with an electric- field amplitude of 3,000 (V/m). Seawater is characterized by &r=72, µr = 1, and o = 4 (S/m). The plane is trying to communicate a message to a submarine submerged at a depth d below the water surface. If the submarine's receiver requires a minimum signal amplitude of 0.01 (µV/m), what is the maximum depth d to which successful communication is still possible?arrow_forwardDuring the Cold War, American submarines operated as "lone wolves" at extreme ocean depths for many months at a time. Ordinary radio signals are greatly attenuated at such depths, making communication with the submarines difficult. One way suggested to communicate with the submarines was a program the Navy called Seafarer that used extremely low frequency waves. If the Seafarer transmitter broadcast at 82 Hz, what would the transmitter's quarter wavelength antenna have to be in order to receive the signal? kmarrow_forwardWhen a high-power laser is used in the Earth's atmosphere the electric field associated with the laser beam can ionize the air, turning it into a conducting Plasma that reflects the laser light. In dry air at 0°C and 1 atm, electric breakdown occurs for fields with amplitudes above about 3:00 Mv/m a) At this maximum Intensity, what Power can be delivered in a cylindrical beam diameter 4 3.03mm? Note Answer must be in W.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Polarization of Light: circularly polarized, linearly polarized, unpolarized light.; Author: Physics Videos by Eugene Khutoryansky;https://www.youtube.com/watch?v=8YkfEft4p-w;License: Standard YouTube License, CC-BY