["L", randRange(1,999) * pow(10, randRange(-2,3)), 1, "m"]
["\\delta", (randRange(1,999) * pow(10, randRange(-5,-3))), 0, "mm"]
["cs1", 0.05, -1, "mm"]
["cs2", 0.05, -1, "mm"]
["T_0", 25, -1, "^{\\circ} C" ]
["T", randRange(25000, 200000) * pow(10, -3), 1, "^{\\circ} C"]
["E", 7000000, -1, "Pa"]
["\\alpha", 0.000023, 1, ""]
[
{
eqnText:"\\delta_{univ} = \\alpha (T-T_0) L",
eqnVars:["\\delta_{univ}","\\alpha","T","T_0","L"]
},
{
eqnText:"\\sigma = - \\frac{P L}{A E}",
eqnVars:["\\sigma","P","L","A","E"]
}
]
[ L, gap]
eqnSolverPRO.initJSAV(equations, parameters)
A solid square bar of cross-sectional dimensions
CS1[1] CS1[3] x
CS2[1] CS1[3] is attached rigidly to the wall at point A
and has a gap of 1 mm from the rigid wall at point B at
T[1] T[3].
Knowing the bar is made of aluminum,
L[0] =
L[1]
L[3]
gap[0] =
gap[1]
gap[3]
nT[0] =
nT[1]
nT[3]
E[0] =
E[1]
E[3]
a[0] =
a[1]
a[3]
1. Given the expansion of the bar in the present condition,
what is the length of the bar prior to expansion?
gap[1] / (a[1] * (nT[1]-T[1]))
1. At what temperature does the gap close?
gap[1] / (a[1]*L[1]) + T[1]
1. Given the expansion of the bar in the present condition,
what is the value of alpha for aluminium?
gap[1] / (L[1] * (nT[1]-T[1]))
1. At a temperature of nT[1] degree C, what is the length
expansion of the bar?
a[1] * (nT[1]-T[1]) * L[1]
[ eqnSolverPRO.userInput ]
if (!eqnSolverPRO.checkAnswer() && !guess[0]) {
return ""; // User did not click, and correct answer is not
// initial array state
} else { return eqnSolverPRO.checkAnswer(arr_size); }
round((gap / (a * (nT-T)))*1000) / 1000 The correct answer expected from the student
Add different levels of hints corresponding to reaction from the evaluator function in JS file.