Review. Around the core of a nuclear reactor shielded by a large pool of water. Cerenkov
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Chapter 38 Solutions
Bundle: Physics for Scientists and Engineers, Volume 2, Loose-leaf Version, 10th + WebAssign Printed Access Card, Single-Term
- (a) Find the momentum of a 100-keV X-ray photon. (b) Find the velocity of a neutron with the same momentum. (c) What is the neutron’s kinetic energy in eV?arrow_forwardThe magnetic field in a cyclotron is 1.25 T, and the maximum orbital radius of the circulating protons is 0.40 m. (a) What is the kinetic energy of the protons when they are ejected from the cyclotron? (b) What Is this energy in MeV? (c) Through what potential difference would a proton have to be accelerated to acquire this kinetic energy? (d) What is the period of tire voltage source used to accelerate the piotons? (e) Repeat tire calculations for alpha-particles.arrow_forwardHigh-Energy Cancer Treatment. Scientists are working on a new technique to kill cancer cells by zapping them with ultrahighenergy (in the range of 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 5.0 um in diameter, with the pulse lasting for 4.0 ns with an average power of 2.0 * 1012 W. We shall assume that the energy is spread uniformly over the faces of 100 cells for each pulse. (a) How much energy is given to the cell during this pulse? (b) What is the intensity (in W/m2) delivered to the cell? (c) What are the maximum values of the electric and magnetic fields in the pulse?arrow_forward
- Around the core of a nuclear reactor shielded by a large pool of water, Cerenkov radiation appears as a blue glow (see figure below). Cerenkov radiation occurs when a particle travels faster through a medium than the speed of light in that medium. It is the electromagnetic equivalent of a bow wave or a sonic boom. An electron is traveling through water at a speed 7.2% faster than the speed of light in water. U.S. Department of Energy/Photo Researchers, Inc. (a) Determine the electron's total energy. X Your response differs from the correct answer by more than 10%. Double check your calculations. MeV (b) Determine the electron's kinetic energy. X Your response differs from the correct answer by more than 100%. MeV (c) Determine the electron's momentum. X Your response differs from the correct answer by more than 10%. Double check your calculations. MeV/c (d) Find the angle between the shock wave and the electron's direction of motion. Oarrow_forwardThe most energetic electromagnetic waves in the universe are gamma-rays from gamma ray bursts (GRBs) from collapsing massive stars, observed by satellites with expected energies of 100 TeV (1 TeV = 1012eV). 1. What is the frequency of these energetic gamma ray photons? 1 eV = 1.60 x 10-19 J. 2. What is the wavelength?arrow_forwardAround the core of a nuclear reactor shielded by a large pool of water, Cerenkov radiation appears as a blue glow (see figure below). Cerenkov radiation occurs when a particle travels faster through a medium than the speed of light in that medium. It is the electromagnetic equivalent of a bow wave or a sonic boom. An electron is traveling through water at a speed 7.2% faster than the speed of light in water. U.S. Department of Energy/Photo Researchers, Inc. (a) Determine the electron's total energy. MeV (b) Determine the electron's kinetic energy. MeV (c) Determine the electron's momentum. MeV/c (d) Find the angle between the shock wave and the electron's direction of motion. Oarrow_forward
- A limitation on how many spectra per second can be recorded by a time-of-flight mass spectrometer is the time it takes the slowest ion to go from the source to the detector. Suppose we want to scan up to m/z 500 for ions with z = 1. Calculate the speed of this heaviest ion if it is accelerated through 5.00 kV in the source. How long would it take to drift 2.00 m through a spectrometer? At what frequency could you record spectra if a new extraction cycle were begun each time the heaviest ion reached the detector? What would be the frequency if you wanted to scan up to m/z 1000?arrow_forwardQuestion: The electronic structure of atoms and molecules may be investigated using photoelectron spectroscopy. An electron in a photoelectron spectrometer is accelerated from rest by a uniform electric field to a speed of 420 km s−1 in 10 µs. Determine the kinetic energy of the electron?arrow_forwardFiles -> A webassign.net/web/Student/Assignment-Responses/submit?dep=22985018&tags=autosave#question3540154_7 0.69435 V MW 7. Previous Answers V SERPSET9 34.P.032. At what distance from a 115 W electromagnetic wave point source does Emax = 13.0 V/m? 6.389 8. Previous Answers V SERPSET9 34.P.067. A 1.11-m-diameter circular mirror focuses the Sun's rays onto a circular absorbing plate 2.00 cm in radius, which holds a can containing 1.05 L of water at 20.0°C. (a) If the solar intensity is 1.02 kW/m2, what is the intensity on the absorbing plate? 785.46 kW/m2 (b) At the plate, what is the maximum magnitude of the field E? 24.335 V KN/C (c) At the plate, what is the maximum magnitude of the field B? 81.1187 V HT (d) If 40.0% of the energy is absorbed, what time interval is required to bring the water to its boiling point? 0.0119 X min Submit Answer 9. Previous Answers V There's a very important difference between light waves and sound waves (or any other types of waves, for that matter).…arrow_forward
- the US, Verizon's new 5G signal uses electromagnetic waves of frequency 28 GHz, which is 28 x 10^9 Hz. a. What wavelength of light is this? b. What kind of electromagnetic wave is this (radio, infrared, x-ray, etc)? C. Your microwave oven uses electromagnetic waves of frequency 2.4 GHz or 2.4 x 10^9 Hz. The energy contained in a photon is directly proportional to its frequency. This means that: Everizon 28 x 10°HZ W hile EMicrowave Oven x 2.4 × 10°HZ How many times more energy does a photon from the Verizon cell signal have than the photon from your microwave? Compare that to the previous (4G LTE) signal of 700 MHz or 7 x 10^8 Hz. (Before you get too worried remember that total energy delivered is related to intensity as well, not just individual photon energy. You can blind yourself with a red laser, but not with a dim red penlight of the same frequency, for example). acearrow_forwardA perfectly reflecting thin square mirror 3 m on a side faces the Sun at about Earth's distance from the Sun so that the solar intensity is 1400 W/m. If the mirror has a mass of 10 g and starts from rest, how fast is it moving after 100,000 seconds (a little more than 1 day) in m/s?arrow_forwardEM radiation has an average intensity of 2900 W/m2. Which of the following statements about the E or B fields in this radiation is correct? Bmax = 4.93 x 10-6 T Brms = 4.17 x 10-6 T Erms = 806.2 N/C Emax = 1131.6 N/Carrow_forward
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