Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 2, Problem 2.32P
To determine
The electric and magnetic field strengths corresponding to the solar constant, the mean value for the solar constant is
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2. The wavelength of maximum intensity of the sun's radiation is observed to be near
500 nm. Assume the sun to be a black-body and calculate,imsed of
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(c) At what rate is the sun losing mass in units of kg/s? (Hint: What are the units from
rignslavaw wert odrai Jari W (d)
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(d) At that rate, how much time would it take to exhaust the sun's fuel supply? Does
your answer seem reasonable? (The sun's mass is ~2.0x1030 kg)
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its total intensity emitted?
O 4.3 MW per square meter.
O 4.9 MW per square meter.
O 5.2 MW per square meter.
O 5.7 MW per square meter.
O 6.4 MW per square meter.
Chapter 2 Solutions
Introduction To Health Physics
Ch. 2 - Two blocks of mass 0.1 kg and 0.2 kg approch each...Ch. 2 - A bullet whose mass is 50 g travels at a velocity...Ch. 2 - Compute the mass of the Earth, assuming it to be a...Ch. 2 - An automobile weighing 2000 kg and going at a...Ch. 2 - A small electrically charged sphere of mass 0.1 g...Ch. 2 - A capacitor has a capacitance of 10F . How much...Ch. 2 - A small charged particle whose mass is 0.01 g...Ch. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - A current of 25 mA flows through a 25-gauge wire,...Ch. 2 - An electron starts at rest on the negative plate...Ch. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - (a) A 1000-MW(e) nuclear power plant operates at a...Ch. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27PCh. 2 - The specific heat of water in the English system...Ch. 2 - Prob. 2.29PCh. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - How many cubic meters of water must fall over a...Ch. 2 - (a) Calculate the speed of a 25-MeV proton. (b)...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Calculate the speed of a (a) 0.5-MeV electron and...Ch. 2 - How much sub-butuminous coal (20,000 kJ/kg) would...Ch. 2 - Prob. 2.40PCh. 2 - How much oil (138,690 Btu/gal) would it take to...Ch. 2 - How much oil (138,690 Btu/gal) would it take to...Ch. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - Prob. 2.45PCh. 2 - Prob. 2.46PCh. 2 - Prob. 2.47PCh. 2 - Prob. 2.48PCh. 2 - Prob. 2.49P
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- A photon has an energy of 1.9 meV (milli electron Volt). What is the wavelength of this photon, expressed in micrometers? Keep four significant digits. And the answer is NOT 6.543arrow_forward1) Determine the day of the year where the solar irradiance outside the Earth's atmosphere is equal to 1384 W/m ,suppose that the value of the solar constant (Hconstant) is 1.353 kW/m2. 2) Determine the day of the year where the declination angle is 15 degreearrow_forwardB2. A spherical star is detected by an astronaut in a spacecraft at a distance z of 1.5×10¹2 kilometers. The star can be regarded as a blackbody with a temperature of 11,300 K. The radius r of the star is 3.5×106 kilometers. (a) Calculate the radiant exitance and the radiant intensity of the star. (b) Calculate the irradiance that can be detected by the astronaut. (c) The photodetector used by the astronaut in the spacecraft has a responsivity of 120 kV/W and an photosensitive area of 0.5 mm². Calculate the output voltage of the detector in the detection of the star. CAMINS +II+ Figure B2arrow_forward
- An infrared satellite measures outgoing radiation that leaves Earth's surface through an atmospheric window. The observed spectral irradiance at a wavelength of 10 μm is 2.199×107 W m-2 m-1. What is the temperature of the surface? Give your answer in K.arrow_forwardB1arrow_forward3. Suppose a planet has a surface temperature of 500 °K. (a)What is the total emission from the planet's surface (Wm²) over all wavelengths assuming it emits as a blackbody? (b) What is the wavelength of maximum emission for this planet? (c) Assume Earth has an average surface temperature of 300°K and emits as a black body. Earth's total emission would be what percent of that of the other planet? (d) What would the emissivity of the other planet have to be to have the same total emission as earth? (e) What would the brightness temperature of the other planet be in (a) and in (d)?arrow_forward
- Calculate the wavelength of a photon having an energy of 5.89 x 10^11 J of energy. E = hc/λ You must show a correct numerical setup and your answer must include the correct mathematical unit.arrow_forwardd&earrow_forwardI have the answers for a-c. For a, the answer is 7.29 x 10-3 C. For b, the answer is 656 nm and c is 122 nm. Can you please help with d and e? Thank you.arrow_forward
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