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PROBLEM+SET+1

# PROBLEM+SET+1 - PROBLEM SET 1 DUE WEDNESDAY FEBRUARY 8 2012...

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PROBLEM SET 1 DUE: WEDNESDAY, FEBRUARY 8, 2012 TURN IN PROBLEMS LABELED WITH A STAR (*) ONLY *1. Calculate the work (in joules) done on the system for each of the following examples (the system is given in italics). Specify the sign of the work. a) A garbage bag weighing 10 kg is carried down three flights of stairs (10 m up altogether). b) A 12.0 V storage battery is charged by a power supply for 12 h with a current of 2.0 A. c) A muscle of 1 cm 2 cross-section and 10.0 cm length is stretched to 11.0 cm by hanging a mass on it. Assume that the muscle beha ves like a spring that follows Hooke’s law. The Hooke’s law constant for the muscle was determined by finding that the muscle exerts a force of 5.00 N when it is stretched from 10.0 cm to 10.5 cm. d) The volume of an ideal gas changes from 1.00 L to 5.00 L at an initial temperature of 25°C and a constant pressure of 1 atm. e) The volume of an ideal gas changes from 1.00 L to 5.00 L at an initial temperature of 25°C and a constant pressure of 1.00x10 -3 atm. f) The volume of an ideal gas changes from 1.00 L to 5.00 L at a constant temperature of 25°C, and the expansion is done reversibly for an amount of gas corresponding to an initial pressure of 1 atm.

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;:;;;"~~h =- 10 1< 9,'3'1 A"'- ~'-- C.-I VV\) = - q'tl :s --~- b) LV _ E-x-t ""- Q~.ov) (b?,Ot1) C{:J-~) _ -~··,...·t_ • 3 <0 05/1/-, " 1 :5/5 :::- 1004- X ( (o:s .:LV A c) /;l;;:=. F V( = "5 , 0 "-J .-=-=-= -::A; -l,1Co ~,( S--o, roo) ~ _ =- I r rJoxto 3 Il/V\ };-4 (~ - ~ " )='- ::: 1,00 x ( a 3 iV/1M (o,o("! ~~~ iI_/~_ - 'r ~"S _ I IVV'\. d) UJ=--p (v~-v) ~ ~_ :=-f tVVl · C 5-1) L --~-f.f~== :::.. - er o 3" __ ~ __ t----~= ===I·"~=---=-·- =_==~~+I= LV:::: P 5 I -) +,' ~s wkt (I- tv) d) r :::. - t.f 0 >< I ... ~ =- - ( t.-K)t:;; .
---t-! f) eu =- VI ~T ~c:.,,/V) =-- - PI V ~ _ ~++- __ = -(, ~*"",) ('r<901..- ) ~)~ _ ___ ' ~r3/Lt ==. -t(03 '"J _ _ 4 0 , d- S-L--~ ~ _

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2. Calculate the heat (in joules) absorbed by the system for each of the following examples (the system is given in italics). Specify the sign of the heat. Use data from Table 2.2 in textbook. a) 100 g of liquid water is heated from 0°C to 100°C at 1 atm.
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