EBK UNDERSTANDING OUR UNIVERSE (THIRD E
3rd Edition
ISBN: 9780393631760
Author: Blumenthal
Publisher: VST
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Chapter 1, Problem 32QAP
To determine
The knowledge of scientific facts and changes in facts with time.
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Suppose we find an Earth-like planet around one of our nearest stellar neighbors, Alpha Centauri (located only 4.4 light-years away). If we launched a "generation ship" at a constant speed of 1500.00 km/s from Earth with a group of people whose descendants will explore and colonize this planet, how many years before the generation ship reached Alpha Centauri? (Note there are 9.46 ××1012 km in a light-year and 31.6 million seconds in a year.
Use the equation E = mc^2 where E is energy in Joules (J), m is mass in kilograms (kg) and c is the speed of light 3 x 10^8 m/s to answer the following: a) One ton of TNT releases 4.18 gigajoules of energy. The metric prefix giga means billion. a) How much mass would be required to release an equivalent amount of energy? b) How much energy (J) is equivalent to 1 kilogram of mass?
The Planck time is the unique interval of time that can be built out of G, c, and h. Some physicists think that time intervals shorter than the Planck time have no meaning. Using
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h = 6.6 x 10-34 kg m2 s-1,
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Chapter 1 Solutions
EBK UNDERSTANDING OUR UNIVERSE (THIRD E
Ch. 1.1 - Prob. 1.1CYUCh. 1.2 - Prob. 1.2CYUCh. 1.3 - Prob. 1.3CYUCh. 1 - Prob. 1QAPCh. 1 - Prob. 2QAPCh. 1 - Prob. 3QAPCh. 1 - Prob. 4QAPCh. 1 - Prob. 5QAPCh. 1 - Prob. 6QAPCh. 1 - Prob. 7QAP
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- The speed of light is 200 million meters per second. One kilometer is 1000 meters. What is the speed of light in miles per hour? Round your answer to the nearest million miles.arrow_forwardThe nearest star to our sun is Proxima Centauri, at a distance of 4.3 light-years from the Sun. A light-year is the distance that light travels in one year (365 days). How far away, in kilometers, is Proxima Centauri from the Sun?Express your answer using two significant figures.arrow_forwardTry Now ... .... Listed below are some distances from Earth to other objects in the Milky Way galaxy. Convert each distance to light-years. (Each of these distances is less than one light-year. For an added challenge, convert each distance to light minutes or light seconds.) 1. The distance from Earth to the Moon is about 384,400 km. How many light-years is this? 2. The distance from Earth to Mars is about 784,000,000 km. How many light-years is this? 3. The distance from Earth to Pluto is about 5,750,000,000 km. How many light-years is this?arrow_forward
- When asked about his thoughts on a new scientific hypothesis, Wolfgang Pauli once said: “That's not right, that's not even wrong.” What fundamental principle of science was he alluding to? And why is the second part of this quote more important than the first?arrow_forwardI’ve gotten 3 different answers each time I’ve worked #4 out. I have no idea what to do.arrow_forwardIf the sun suddenly ceased to shine, how long would it take earth to become dark? a) Using the formula d = s x t , where d=distance , s= speed, and t = time, rearrange the terms to solve for time. b) Given the distance to the Sun is 93 million miles ( 1.5 x 10^11 m) and the speed of light is c= 3 x 10^8 m/s) use this information to find out how many SECONDS it takes light to reach earth. c) Convert your answer for b) to Minutes and remaining seconds.arrow_forward
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