21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 7, Problem 16QP
To determine
The source of the material that makes up the Sun and the rest of the Solar system .
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What are the solar system?
Uranium-238 (U-238) has a half-life of 4.5 billion years. Geologists find a rock containing a mixture of U-238 and lead, and determine that 74% of the original U-238 remains; the other 26% has decayed into lead. How old is the rock?
___billion years old
The lunar soil (regolith) is chemically very different from Earth soil, because
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True
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Chapter 7 Solutions
21st Century Astronomy
Ch. 7.1 - Prob. 7.1CYUCh. 7.2 - Prob. 7.2CYUCh. 7.3 - Prob. 7.3CYUCh. 7.4 - Prob. 7.4CYUCh. 7.5 - Prob. 7.5CYUCh. 7 - Prob. 1QPCh. 7 - Prob. 2QPCh. 7 - Prob. 3QPCh. 7 - Prob. 4QPCh. 7 - Prob. 5QP
Ch. 7 - Prob. 6QPCh. 7 - Prob. 7QPCh. 7 - Prob. 8QPCh. 7 - Prob. 9QPCh. 7 - Prob. 10QPCh. 7 - Prob. 11QPCh. 7 - Prob. 12QPCh. 7 - Prob. 13QPCh. 7 - Prob. 14QPCh. 7 - Prob. 15QPCh. 7 - Prob. 16QPCh. 7 - Prob. 17QPCh. 7 - Prob. 18QPCh. 7 - Prob. 19QPCh. 7 - Prob. 20QPCh. 7 - Prob. 21QPCh. 7 - Prob. 22QPCh. 7 - Prob. 23QPCh. 7 - Prob. 24QPCh. 7 - Prob. 25QPCh. 7 - Prob. 26QPCh. 7 - Prob. 27QPCh. 7 - Prob. 28QPCh. 7 - Prob. 29QPCh. 7 - Prob. 30QPCh. 7 - Prob. 31QPCh. 7 - Prob. 32QPCh. 7 - Prob. 33QPCh. 7 - Prob. 34QPCh. 7 - Prob. 35QPCh. 7 - Prob. 36QPCh. 7 - Prob. 37QPCh. 7 - Prob. 38QPCh. 7 - Prob. 39QPCh. 7 - Prob. 40QPCh. 7 - Prob. 41QPCh. 7 - Prob. 42QPCh. 7 - Prob. 43QPCh. 7 - Prob. 44QPCh. 7 - Prob. 45QP
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- Uranium 238 (U-238) has a half-life of 4.5 billion years. Geologists find a rock containing a mixture of U-238 and lead, and they determine that 85% of the original U-238 remains; the other 15% has decayed into lead. How old is the rock?arrow_forwardWhere in the solar system (and beyond) have scientists found evidence of organic molecules?arrow_forward4b) the average density of the earth is 5.5 g/cm^3. Which has the greater density 1g of uranium of planet earth 4c) which has the greater density -5kg of lead or 10kg of gold? 4d) which has the greater density-5kg of osmium of 10kg is steel? ANSWER ALL PLZ!!arrow_forward
- Uranium-238 (U-238) has a half-life of 4.5 billion years. Geologists find a rock containing a mixture of U-238 and lead, and determine that 72% of the original U-238 remains; the other 28% has decayed into lead. How old is the rock?arrow_forwardWhy is infrared radiation emitted from earth A) the earth cannot absorb or emit infrared radiation B) the earth emits infrared radiation because of radioactive decay C) the earth can emit infrared radiation because it core D) the earth absorbs radiation from the sunarrow_forwardThe half-life of Carbon-13 is 5750 years. Samples taken at an excavation site show that a one-kilogram sample has 65% Carbon-13 as compared to a normal sample. What is the age of the sample?arrow_forward
- Moon dust is dangerous to astronauts because it is highly radioactive it will explode when exposed to oxygen it consists of sharp, jagged particles which are dangerous to inhale it contains large amounts of toxic arsenic The Biosphere 2 experiment was an experiment performed on Mars in the 1990's to see whether small-scale terraforming might be feasible a prototype "space colony" in Low Earth Orbit that supported a crew of 6 for nine months a successful attempt to grow crops hydroponically to see if space colonists could feed themselves with home-grown food a largely unsuccessful attempt to create a completely self-contained habitat on Eartharrow_forwardApproximately how much mass (in kg) is in the liquid outer core? Region Percent Mass Temperature Density Crust 0.5% 500 K Mantle 67.0% 3,000 K Outer Core 30.8% 5,200 K 10.9 g/cm^3 Inner Core 1.7% 5,700 Karrow_forwardWhat creates the Earth's magnetic field? the moon the liquid iron/nickel core the atmosphere the solid inner corearrow_forward
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