Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 9, Problem 17QFR
To determine
The explanation why the atmospheres of the terrestrial planets atmospheres are different.
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1. At 0°C a steel cable is 1km long and 1cm diameter when it is heated it expands and its resistivity
increases. Calculate the change in resistance of the cable as it is heated from 0-20°C
The temperature coefficient of resistance a, gives the fractional increase in resistance per °C.
So increase in resistance AR = Ra.AT
Where R, is the resistance at 0°C
For steel a, 0.003 °C
The coefficient of linear expansion a- gives the fractional increase in length per °C temperature
rise.
So increase in Length AL La-AT
Where L, is the length at 0°C
For steel a₁ = 12 x 10 °C-1
The resistivity of steel at 0°C = 1.2 x 10 Qm
1.
F
E
6V
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B
a
6V
b
C
C
Apply Kirchoff's 1st law to point C for the circuit above
Apply Kirchoff's 2nd Law to loops:
a.
ABCFA
b.
ABDEA
C.
FCDEF
d. Find values for currents a,b and c
D
2. The results of the Rutherford experiment can be categorized in 3 statements. Fill in the
missing words
Most
11.
Some
III.
A few
State which result gives evidence that the nucleus is
a. heavier than an alpha particle
b. very small compared to the size of the atom
c. positively charged
3. Using values in the diagram derive an expression for r
.0
e
m
Chapter 9 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 9 - How do Mercury, Venus, and Mars each compare with...Ch. 9 - How do the interior structures of Mercury, Venus,...Ch. 9 - What is the surface of Mercury like?Ch. 9 - Does Mercury have an atmosphere? Why or why not?Ch. 9 - Prob. 5QFRCh. 9 - What is the dominant gas in Venuss atmosphere? How...Ch. 9 - What are the clouds of Venus made of?Ch. 9 - Why is Venus so hot?Ch. 9 - Can we see the surface of Venus? Why or why not?...Ch. 9 - Prob. 10QFR
Ch. 9 - Prob. 11QFRCh. 9 - What are the Martian polar caps composed of?Ch. 9 - (9.3) What is the Martian atmosphere like?Ch. 9 - What is the evidence that Mars once had running...Ch. 9 - Prob. 15QFRCh. 9 - Prob. 16QFRCh. 9 - Prob. 17QFRCh. 9 - Prob. 18QFRCh. 9 - Prob. 1TQCh. 9 - Prob. 2TQCh. 9 - Prob. 3TQCh. 9 - Prob. 4TQCh. 9 - Prob. 5TQCh. 9 - Prob. 6TQCh. 9 - Prob. 7TQCh. 9 - Prob. 8TQCh. 9 - What role might planetesimal impacts have played...Ch. 9 - Prob. 1PCh. 9 - Prob. 2PCh. 9 - Prob. 3PCh. 9 - Prob. 4PCh. 9 - Olympus Mons is 26 kilometers above the...Ch. 9 - Prob. 6PCh. 9 - Prob. 1TYCh. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Prob. 5TYCh. 9 - Prob. 6TYCh. 9 - Prob. 7TYCh. 9 - Prob. 8TY
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