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Get Full Access to University Physics, Volume 3 - 17 Edition - Chapter 10 - Problem 41
Get Full Access to University Physics, Volume 3 - 17 Edition - Chapter 10 - Problem 41

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ISBN: 9781938168185 2032

## Solution for problem 41 Chapter 10

University Physics, Volume 3 | 17th Edition

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Problem 41

World War II aircraft had instruments with glowing radium-painted dials. The activity of one such instrument was $$1.0 \times 10^{5} \mathrm{~Bq}$$ when new. (a) What mass of $${ }^{226} \mathrm{Ra}$$ was present? (b) After some years, the phosphors on the dials deteriorated chemically, but the radium did not escape. What is the activity of this instrument 57.0 years after it was made?

Text Transcription:

1.0 times 10^5 Bq

^226 Ra

Step-by-Step Solution:
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The Celestial Sphere  Points of light in the sky o Jupiter o Saturn o Mars o Venus o Mercury o Sun  Large sources of light o Moon o Venus o Sun o Spica  Occasional visitors o Comets o Meteors  Practical astronomy o Zenith  Directly above your head o Nadir  Directly below your feet  The sun’s motion in the sky o The setting sun does not like to set o Solstices and equinoxes mark the beginnings of their seasons o Ecliptic  The path the sun travels o Zodiac  The constellations the sun travels through o Solar day  24 hours o Sidereal day  23 hours 56 minutes o There are 365 days in a year and the sun travels just about 1 degree per day against the celestial sphere o In the course of 1 year the sun makes 1 fewer revolution than the star’s do  Solstices and equinoxes o Specific points on the celestial sphere o Specific instants during the year when the sun is exactly at those points o Solstice  Sun stops o Equinox  Equal night and day  The seasons o The sun goes around the celestial sphere in 1 year o The seasons are connected to where the sun is on the celestial sphere o In winter the sun is above the horizon for a smaller fraction of the day o In winter even when it is up the sun hits the ground

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##### ISBN: 9781938168185

Since the solution to 41 from 10 chapter was answered, more than 203 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: University Physics, Volume 3 , edition: 17. The answer to “?Radioactive DecayWorld War II aircraft had instruments with glowing radium-painted dials. The activity of one such instrument was $$1.0 \times 10^{5} \mathrm{~Bq}$$ when new. (a) What mass of $${ }^{226} \mathrm{Ra}$$ was present? (b) After some years, the phosphors on the dials deteriorated chemically, but the radium did not escape. What is the activity of this instrument 57.0 years after it was made?Text Transcription:1.0 times 10^5 Bq^226 Ra” is broken down into a number of easy to follow steps, and 68 words. This full solution covers the following key subjects: . This expansive textbook survival guide covers 11 chapters, and 1200 solutions. The full step-by-step solution to problem: 41 from chapter: 10 was answered by Aimee Notetaker, our top Physics solution expert on 03/18/22, 10:28AM. University Physics, Volume 3 was written by Aimee Notetaker and is associated to the ISBN: 9781938168185.

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