2011test1v2

2011test1v2 - Phys 100 Fall 2011 Concepts of Physics: Class...

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Phys 100 Fall 2011 Concepts of Physics: Class Test I 26 September 2011 Name: Total: /50 Instructions There are 10 questions on 5 pages. Show your reasoning and calculations and always justify your answers. Physical constants and useful formulae speed = distance traveled time elapsed s = d t acceleration = change in velocity time elapsed a = v t distance = 1 2 × acceleration × time 2 d = 1 2 × a × t 2 acceleration = net force mass a = F m net force = mass × acceleration F = ma earth’s gravitational force = mass × 9 . 8 F = m × 9 . 8 gravitational force = 6 . 67 × 10 - 11 × mass 1 × mass 2 distance 2 F grav = 6 . 67 × 10 - 11 × m 1 × m 2 d 2 Question 1 A chlorine atom ( Cl ) has a mass exactly 35 times that of a hydrogen atom ( H ). Hydrogen atoms and chlorine atoms can combine to form hydrochloric acid, HCl (one chlorine atom and one hydrogen atom). Suppose that this is decomposed giving exactly 5 kg of hydrogen. Which of the following (choose one) is the mass of the chlorine produced by this decomposition? a) 5 kg. b) 7 kg. c) 35 kg. d) 40 kg. e) 165 kg. /4
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Question 2 The planet Mars can be observed from the Earth and its brightness can be monitored as it completes an entire orbit. Describe what each of the following predicts for the variation of
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This note was uploaded on 12/12/2011 for the course PHYS 100 taught by Professor Collins during the Fall '11 term at Mesa CC.

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2011test1v2 - Phys 100 Fall 2011 Concepts of Physics: Class...

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