ch 16 physics

# ch 16 physics - Homework Problem Chapter 16 2. How many...

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Homework Problem Chapter 16 2. How many electrons make up a charge of μC?  \$! Solution: a b ˆ  \$! ‚ "! o "Þ)( ‚ "! ' "% " "Þ'!#‚"! C electrons "* C ---------------------------------------------------------------------------------------------- 9. What is the total charge of all the electrons in 1.0 kg of H O? # Solution: 8 o o 7 R R . E 8  796/=ß 7  7+== 38 ß  796+< 7+==ß g . R  E@91+.<9 = 8?7,/<ß R  8?7,/< 90 :+<>3-6/= E w 7 o "!!! o #  "' o ") R o 'Þ!# ‚ "! g . E #\$ Ê R o o o \$Þ\$% ‚ "! 7R "!!! 'Þ!#‚"! ") E #\$ . a ba b g water molecules each molecule has electrons #  ) # of electrons o "! \$Þ\$% ‚ "! a b #& ----------------------------------------------------------------------------------------------

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13. Three positive particles of equal charge, +11.0 μC, are located at the corners of an equilateral triangle of side 15.0 cm. Calculate the magnitude and direction of the net force on each particle. Solution: y y x x y x F 31 F 13 F 21 F 12 F 32 F 23 Q 3 Q 1 Q 2 a lJ l o lJ l o lJ l o lJ l o lJ l o lJ l o J "# #" "\$ \$" #\$ \$# J o 5 o o * ‚ "! o %)Þ% U + * ""‚"! # # # # ' # # Š Nm C C m a b a b N Charge : U J o J  J Ä Ä Ä " " #" \$" ° ° ° ° ° B -97:98/8> C  -97:98/8> J J '! J '! J  J '! J '! J ! #J '! #" \$" "8/> cos sin cos sin sin a b a b a b a b a b N ° N J o # %)Þ% '! o )\$Þ) :938>= +6981  C " a b a b sin Charge U À J o J  J Ä Ä Ä # # "# \$#
° ° ° ° B -97:98/8> C  -97:98/8> J  J '!  J '! J

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## This note was uploaded on 09/25/2010 for the course PHYS 302L taught by Professor Tsoi during the Spring '10 term at University of Texas at Austin.

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ch 16 physics - Homework Problem Chapter 16 2. How many...

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