Horizons: Exploring the Universe - With MindTap
14th Edition
ISBN: 9781337578080
Author: Seeds
Publisher: Cengage
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Chapter 12, Problem 9P
To determine
If astronomers made a mistake and measure a size of our solar system is 7.3kpc rather than 8.3kpc from the center of the galaxy and the orbital velocity of the sun is 225 km/s, we have to find the minimum mass of the galaxy.
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Questions 68-70
Four hundred millilitres (mL) of a strong brine solution at room temperature was poured into a measuring cylinder
(Figure 1). A piece of ice of mass 100 g was then gently placed in the brine solution and allowed to float freely
(Figure 2). Changes in the surface level of the liquid in the cylinder were then observed until all the ice had melted.
Assume that the densities of water, ice and the brine solution are 1000 kg m-3, 900 kg m3 and 1100 kg m3,
respectively.
68
Figure 1
400
400
Figure 2
1m² = 1x10 mL
After the ice was placed in the brine solution and before any of it had melted, the level of the brine solution
was closest to
485 mL.
B
490 mL.
C
495 mL.
Displaced volume by ice.
D
500 mL.
weight of ice
69
The level of the brine solution after all the ice had melted was
A
490 mL
B
495 mL
D
1100kg/m² = 909 xious mis
70 Suppose water of the same volume and temperature had been used instead of the brine solution.
In this case, by the time all the ice had melted, the…
Chapter 12 Solutions
Horizons: Exploring the Universe - With MindTap
Ch. 12 - Why is it difficult to specify the dimensions of...Ch. 12 - Why didn’t astronomers before Shapley realize how...Ch. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - Prob. 5RQCh. 12 - Prob. 6RQCh. 12 - Prob. 7RQCh. 12 - Prob. 8RQCh. 12 - Prob. 9RQCh. 12 - Prob. 10RQ
Ch. 12 - Prob. 11RQCh. 12 - Prob. 12RQCh. 12 - Prob. 13RQCh. 12 - Prob. 14RQCh. 12 - Prob. 15RQCh. 12 - Prob. 16RQCh. 12 - Prob. 1DQCh. 12 - Prob. 2DQCh. 12 - Prob. 1PCh. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Prob. 4PCh. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - If the Sun is 4.6 billion years old, how many...Ch. 12 - Prob. 9PCh. 12 - Prob. 10PCh. 12 - Prob. 11PCh. 12 - Prob. 12PCh. 12 - Prob. 1LTLCh. 12 - Prob. 2LTL
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