Review. A microwave oven is powered by a magnetron, an electronic device that generates electromagnetic waves of frequence 2.45 GHz. The microwaves enter the oven and arc reflected by the walls. The standing-wave pattern produced in the oven can cook food unevenly, with hot spots in the food at antinodes and cool spots at nodes, so a turntable is often used to rotate the food and distribute the energy. If a microwave oven intended for use with a turntable is instead used with a cooking dish in a fixed position, the antinodes can appear as burn marks on foods such as carrot strips or cheese. The separation distance between the burns is measured to be 6 cm ± 5%. From these data, calculate the speed of the microwaves.

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Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399
BuyFind

Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399

Solutions

Chapter
Section
Chapter 34, Problem 34.17P
Textbook Problem

Review. A microwave oven is powered by a magnetron, an electronic device that generates electromagnetic waves of frequence 2.45 GHz. The microwaves enter the oven and arc reflected by the walls. The standing-wave pattern produced in the oven can cook food unevenly, with hot spots in the food at antinodes and cool spots at nodes, so a turntable is often used to rotate the food and distribute the energy. If a microwave oven intended for use with a turntable is instead used with a cooking dish in a fixed position, the antinodes can appear as burn marks on foods such as carrot strips or cheese. The separation distance between the burns is measured to be 6 cm ± 5%. From these data, calculate the speed of the microwaves.

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Chapter 34 Solutions

Physics for Scientists and Engineers, Technology Update (No access codes included)
Ch. 34 - A student working with a transmitting apparatus...Ch. 34 - Assume you charge a comb by running it through...Ch. 34 - Which of the following statements are true...Ch. 34 - A plane electromagnetic wave with a single...Ch. 34 - Assume the amplitude of the electric field in a...Ch. 34 - An electromagnetic wave with a peak magnetic field...Ch. 34 - (i) Rank the following kinds of waves according to...Ch. 34 - Consider an electromagnetic wave traveling in the...Ch. 34 - suppose a creature from another planet has eyes...Ch. 34 - For a given incident energy of an electromagnetic...Ch. 34 - Radio stations often advertise instant news. If...Ch. 34 - List at least three differences between sound...Ch. 34 - If a high-frequency current exists in a solenoid...Ch. 34 - When light (or other electromagnetic radiation)...Ch. 34 - Why should an infrared photograph of a person look...Ch. 34 - Do Maxwells equations allow for the existence of...Ch. 34 - Despite the advent of digital television, some...Ch. 34 - What does a radio wave do to the charges in the...Ch. 34 - Describe the physical significance of the Poynting...Ch. 34 - An empty plastic or glass dish being removed from...Ch. 34 - What new concept did Maxwells generalized from...Ch. 34 - Consider the situation shown in Figure P34.1. An...Ch. 34 - A 0.200-A current is charging a capacitor that has...Ch. 34 - A 0.100-A current is charging a capacitor that has...Ch. 34 - An election moves through a uniform electric field...Ch. 34 - A proton moves through a region containing a...Ch. 34 - A very long, thin rod carries electric charge with...Ch. 34 - Suppose you are located 180 in from a radio...Ch. 34 - A diathermy machine, used in physiotherapy,...Ch. 34 - The distance to the North Star, Polaris, is...Ch. 34 - The red light emitted by a helium-neon laser laser...Ch. 34 - Review. A standing-wave pattern is set up by radio...Ch. 34 - An electromagnetic wave in vacuum has an electric...Ch. 34 - The speed of an electromagnetic wave traveling in...Ch. 34 - A radar pulse returns to the transmitterreceiver...Ch. 34 - Figure P34.15 shows a plane electromagnetic...Ch. 34 - Verify by substitution that the following...Ch. 34 - Review. A microwave oven is powered by a...Ch. 34 - Why is the following situation impossible? An...Ch. 34 - ln SI units, the electric field in an...Ch. 34 - At what distance from the Sun is the intensity of...Ch. 34 - If the intensity of sunlight at the Earths surface...Ch. 34 - The power of sunlight reaching each square meter...Ch. 34 - A community plans to build a facility to convert...Ch. 34 - In a region of free space, the electric field at...Ch. 34 - When a high-power laser is used in the Earths...Ch. 34 - Review. Model the electromagnetic wave in a...Ch. 34 - High-power lasers in factories are used to cut...Ch. 34 - Consider a bright star in our night sky. Assume...Ch. 34 - What is the average magnitude of the Poynting...Ch. 34 - Assuming the antenna of a 10.0-kW radio station...Ch. 34 - Review. An AM radio station broadcasts...Ch. 34 - At what distance from a 100-W electromagnetic wave...Ch. 34 - The filament of an incandescent lamp has a 150-...Ch. 34 - At one location on the Earth, the rms value of the...Ch. 34 - A 25.0-mW laser beam of diameter 2.00 mm is...Ch. 34 - A radio wave transmits 25.0 W/m2 of power per unit...Ch. 34 - A 15.0-mW heliumneon laser emits a beam of...Ch. 34 - A heliumneon laser emits a beam of circular cross...Ch. 34 - A uniform circular disk of mass m = 24.0 g and...Ch. 34 - The intensity of sunlight at the Earths distance...Ch. 34 - A plane electromagnetic wave of intensity 6.00...Ch. 34 - Assume the intensity of solar radiation incident...Ch. 34 - A possible means of space flight is to place a...Ch. 34 - Extremely low-frequency (ELF) waves that can...Ch. 34 - A Marconi antenna, used by most AM radio stations,...Ch. 34 - A large, flat sheet carries a uniformly...Ch. 34 - Review. Accelerating charges radiate...Ch. 34 - Review. Accelerating charges radiate...Ch. 34 - Two vertical radio-transmitting antennas are...Ch. 34 - Compute an order-of-magnitude estimate for the...Ch. 34 - What are the wavelengths of electromagnetic waves...Ch. 34 - An important news announcement is transmitted by...Ch. 34 - In addition to cable and satellite broadcasts,...Ch. 34 - Classify waves with frequencies of 2 Hz, 2 kHz, 2...Ch. 34 - Assume the intensity of solar radiation incident...Ch. 34 - In 1965, Arno Penzias and Robert Wilson discovered...Ch. 34 - The eye is most sensitive to light having a...Ch. 34 - Write expressions for the electric and magnetic...Ch. 34 - One goal of the Russian space program is to...Ch. 34 - A microwave source produces pulses of 20.0GHz...Ch. 34 - The intensity of solar radiation at the top of the...Ch. 34 - Two handheld radio transceivers with dipole...Ch. 34 - Consider a small, spherical particle of radius r...Ch. 34 - Consider a small, spherical particle of radius r...Ch. 34 - A dish antenna having a diameter of 20.0 m...Ch. 34 - The Earth reflects approximately 38.0% of the...Ch. 34 - Review. A 1.00-m-diameter circular mirror focuses...Ch. 34 - (a) A stationary charged particle at the origin...Ch. 34 - Review. (a) A homeowner has a solar water heater...Ch. 34 - You may wish to review Sections 16.4 and 16.8 on...Ch. 34 - Lasers have been used to suspend spherical glass...Ch. 34 - Lasers have been used to suspend spherical glass...Ch. 34 - Review. A 5.50-kg black cat and her four black...Ch. 34 - The electromagnetic power radiated by a...Ch. 34 - Review. Gliese 581c is the first Earth-like...Ch. 34 - A plane electromagnetic wave varies sinusoidally...Ch. 34 - A linearly polarized microwave of wavelength 1.50...Ch. 34 - Review. In the absence of cable input or a...Ch. 34 - Review. An astronaut, stranded in space 10.0 m...

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