if lookFor is in card field "system" of card 2 then
put "system choice" into card field status of card 2
put return after card field status of card 2
put lookFor after card field status of card 2
put return after card field status of card 2
put card field "title" after card field status of card 2
set visible of card field menuList of card 2 to false
go to card 2
end if
if lookFor is in card field "type" of card 2 then
put "type choice" into card field status of card 2
put return after card field status of card 2
put lookFor after card field status of card 2
put return after card field status of card 2
put card field "title" after card field status of card 2
set visible of card field menuList of card 2 to false
go to card 2
end if
if lookFor is in card field "discipline" of card 2 then
put "discipline choice" into card field status of card 2
put return after card field status of card 2
put lookFor after card field status of card 2
put return after card field status of card 2
put card field "title" after card field status of card 2
set visible of card field menuList of card 2 to false
go to card 2
end if
end hit
-- part 23 (field)
-- low flags: 81
-- high flags: 0004
-- rect: left=50 top=150 right=325 bottom=462
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 3
-- text size: 18
-- style flags: 256
-- line height: 24
-- part name: helper
-- part 24 (button)
-- low flags: 00
-- high flags: 2000
-- rect: left=0 top=68 right=80 bottom=512
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 25 (button)
-- low flags: 00
-- high flags: 2000
-- rect: left=0 top=80 right=92 bottom=512
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 26 (button)
-- low flags: 00
-- high flags: 2000
-- rect: left=0 top=92 right=104 bottom=512
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 27 (button)
-- low flags: 80
-- high flags: 2000
-- rect: left=206 top=140 right=162 bottom=306
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 28 (button)
-- low flags: 80
-- high flags: 2000
-- rect: left=206 top=140 right=162 bottom=306
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 29 (button)
-- low flags: 80
-- high flags: 2000
-- rect: left=206 top=140 right=162 bottom=306
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 30 (button)
-- low flags: 80
-- high flags: 2000
-- rect: left=206 top=140 right=162 bottom=306
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 31 (button)
-- low flags: 80
-- high flags: 2000
-- rect: left=206 top=140 right=162 bottom=306
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 32 (button)
-- low flags: 80
-- high flags: 2000
-- rect: left=206 top=140 right=162 bottom=306
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
send hit to card field clickable
end mouseUp
-- part 33 (button)
-- low flags: 00
-- high flags: 2003
-- rect: left=0 top=0 right=32 bottom=32
-- title width / last selected line: 0
-- icon id / first selected line: 32488 / 32488
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
put return after card field status of card 2
put card field "title" into line 3 of card field status of card 2
go to card 2
end mouseUp
-- part 34 (button)
-- low flags: 00
-- high flags: 2003
-- rect: left=480 top=0 right=32 bottom=512
-- title width / last selected line: 0
-- icon id / first selected line: 25002 / 25002
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Help
----- HyperTalk script -----
on mouseDown
set visible of card field helper to true
end mouseDown
on mouseUp
set visible of card field helper to false
end mouseUp
on mouseLeave
set visible of card field helper to false
end mouseLeave
-- part 35 (field)
-- low flags: 81
-- high flags: 0000
-- rect: left=156 top=120 right=205 bottom=356
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: discipline
-- part 36 (field)
-- low flags: 81
-- high flags: 0000
-- rect: left=156 top=120 right=205 bottom=356
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: system
-- part 37 (field)
-- low flags: 81
-- high flags: 0000
-- rect: left=156 top=120 right=205 bottom=356
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: type
-- part contents for card part 6
----- text -----
Equipotential Surfaces
-- part contents for card part 7
----- text -----
Equipotential Surfaces is a simulation of static electric fields in the vicinity of charged conductors. The user may set up an arbitrary arrangement of conductors, consisting of strips on a rectangular grid (25 X 25 grid points) perpendicular to the plane of the screen. Each conductor must be set to one of five values of electric potential (-10, -5, 0, +5, +10 volts). The program than computes the potential at the remaining points on the grid, using the relaxation method for approximating solutions to LaPlace's equation. It displays equipotential lines in the vicinity of the conductors. This program has been used in the third semester introductory physics course for science and engineering majors at Carnegie Mellon.
-- part contents for card part 19
----- text -----
Carnegie Mellon University
-- part contents for card part 23
----- text -----
Click "UP-ARROW" for previous menu
Click any BOLD-FACE phrase for a listing of entries sharing that
property or attribute
-- part contents for card part 18
----- text -----
Trowbridge, David
-- part contents for card part 8
----- text -----
DEPARTMENT: Center for Design of Educational Computing
DESCRIPTORS: electric fields, equipotentials, electromagnetism
DOCUMENTATION: For suggestions about classroom usage, contact the author.