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Units: Answer test results

This page exposes the results of running answer tests on STACK test cases. This page is automatically generated from the STACK unit tests and is designed to show question authors what answer tests actually do. This includes cases where answer tests currentl fail, which gives a negative expected mark. Comments and further test cases are very welcome.

Units

Test
?
Student response
Teacher answer
Opt
Mark
Answer note
Units 
1/0
 
1
 
2
 -1 ATUnits_STACKERROR_SAns.
TEST_FAILED
The answer test failed to execute correctly: please alert your teacher. Division by zero.
Units 
1
 
1/0
 
2
 -1 ATUnits_STACKERROR_TAns.
TEST_FAILED
The answer test failed to execute correctly: please alert your teacher. Division by zero.
Units 
1
 
1
 
1/0
 -1 ATUnits_STACKERROR_Opt.
TEST_FAILED
The answer test failed to execute correctly: please alert your teacher. Division by zero.
Units 
x-1)^2
 
(x-1)^2
 
2
 -1 ATUnitsTEST_FAILED-Empty SA.
The answer test failed to execute correctly: please alert your teacher. Attempted to execute an answer test with an empty student answer, probably a CAS validation problem when authoring the question.
Units 
12.3*m*s^(-1)
 
3*m
 
[3,x]
 -1 ATNumSigFigs_STACKERROR_not_integer.
The answer test failed to execute correctly: please alert your teacher.
Units 
3*m*s^(-1)
 
3*m
 
[1,2,3]
 -1 ATNumSigFigs_STACKERROR_list_wrong_length.
The answer test failed to execute correctly: please alert your teacher.
Units 
12.3*m*s^(-1)
 
{12.3*m*s^(-1)}
 
3
 -1 ATUnits_TA_not_expression.
The answer test failed to execute correctly: please alert your teacher.
Units 
x=12.3*m*s^(-1)
 
12.3*m*s^(-1)
 
3
 0 ATUnits_SA_not_expression.
Your answer needs to be a number together with units. Do not use sets, lists, equations or matrices.
Missing units
Units 
12.3
 
12.3*m
 
3
 0 ATUnits_SA_no_units.
Your answer must have units.
Units 
12
 
12.3*m
 
3
 0 ATUnits_SA_no_units.
Your answer must have units.
Units 
1/2
 
12.3*m
 
3
 0 ATUnits_SA_no_units.
Your answer must have units.
Units 
e^(1/2)
 
12.3*m
 
3
 0 ATUnits_SA_no_units.
Your answer must have units.
Units 
9.81*m
 
12.3
 
3
 -1 ATUnits_SB_no_units.
The answer test failed to execute correctly: please alert your teacher.
Only units
Units 
m/s
 
12.3*m/s
 
3
 0 ATUnits_SA_only_units.
Your answer needs to be a number together with units. Your answer only has units.
Units 
m
 
12.3*m/s
 
3
 0 ATUnits_SA_only_units.
Your answer needs to be a number together with units. Your answer only has units.
Bad units
Units 
9.81+m/s
 
9.81*m/s
 
3
 0 ATUnits_SA_bad_units.
Your answer must have units, and you must use multiplication to attach the units to a value, e.g. 3.2*m/s.
Basic tests
Units 
12.3*m/s
 
12.3*m/s
 
3
 1 ATUnits_units_match.
Units 
12.4*m/s
 
12.3*m/s
 
3
 0 ATNumSigFigs_Inaccurate. ATUnits_units_match.
The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Units 
12.4*m/s
 
12.3*m/s
 
[3,2]
 1 ATUnits_units_match.
Units 
12.45*m/s
 
12.3*m/s
 
[3,2]
 0 ATNumSigFigs_WrongDigits. ATUnits_units_match.
Your answer contains the wrong number of significant digits.
Units 
13.45*m/s
 
12.3*m/s
 
[3,2]
 0 ATNumSigFigs_WrongDigits. ATNumSigFigs_Inaccurate. ATUnits_units_match.
Your answer contains the wrong number of significant digits. The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Units 
7.54E-5*(s*M)^-1
 
5.625E-5*s^-1
 
[3,2]
 0 ATNumSigFigs_VeryInaccurate. ATUnits_incompatible_units.
Your units are incompatible with those used by the teacher.
Units 
7.54E-5*(s*M)^-1
 
stackunits(5.625E-5,1/s)
 
[3,2]
 0 ATNumSigFigs_VeryInaccurate. ATUnits_incompatible_units.
Your units are incompatible with those used by the teacher.
Units 
12*m/s
 
12.3*m/s
 
3
 0 ATNumSigFigs_WrongDigits. ATNumSigFigs_Inaccurate. ATUnits_units_match.
Your answer contains the wrong number of significant digits. The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Units 
-9.81*m/s^2
 
-9.81*m/s^2
 
3
 1 ATUnits_units_match.
Units 
-9.82*m/s^2
 
-9.815*m/s^2
 
3
 1 ATUnits_units_match.
Units 
-9.81*m/s^2
 
-9.815*m/s^2
 
3
 0 ATNumSigFigs_Inaccurate. ATUnits_units_match.
The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Units 
-9.81*m*s^(-2)
 
-9.81*m/s^2
 
3
 1 ATUnits_units_match.
Units 
-9.82*m/s^2
 
-9.81*m/s^2
 
3
 0 ATNumSigFigs_Inaccurate. ATUnits_units_match.
The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Units 
-9.81*m*s^(-2)
 
-9.81*m/s^2
 
3
 1 ATUnits_units_match.
Units 
-9.81*m/s/s
 
-9.81*m/s^2
 
3
 1 ATUnits_units_match.
Units 
-9.81*m/s
 
-9.81*m/s^2
 
3
 0 ATUnits_incompatible_units. ATUnits_correct_numerical.
Your units are incompatible with those used by the teacher. Please check your units carefully.
Units 
-9.81*m/s
 
-9.81*m/s^2
 
3
 0 ATUnits_incompatible_units. ATUnits_correct_numerical.
Your units are incompatible with those used by the teacher. Please check your units carefully.
Units 
(-9.81)*m/s^2
 
-9.81*m/s^2
 
3
 1 ATUnits_units_match.
Units 
520*amu
 
520*amu
 
3
 1 ATNumSigFigs_WithinRange. ATUnits_units_match.
Units 
520*amu
 
521*amu
 
3
 0 ATNumSigFigs_WithinRange. ATNumSigFigs_Inaccurate. ATUnits_units_match.
The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Missing units
Units 
(-9.81)
 
-9.81*m/s^2
 
3
 0 ATUnits_SA_no_units.
Your answer must have units.
Units 
9.81*m/s
 
-9.81*m/s^2
 
3
 0 ATNumSigFigs_WrongSign. ATUnits_incompatible_units.
Your answer has the wrong algebraic sign. Your units are incompatible with those used by the teacher.
Units 
8.81*m/s
 
-9.81*m/s^2
 
3
 0 ATNumSigFigs_WrongSign. ATNumSigFigs_VeryInaccurate. ATUnits_incompatible_units.
Your answer has the wrong algebraic sign. Your units are incompatible with those used by the teacher.
Units 
8.1*m/s
 
-9.81*m/s^2
 
3
 0 ATNumSigFigs_WrongDigits. ATNumSigFigs_WrongSign. ATNumSigFigs_VeryInaccurate. ATUnits_incompatible_units.
Your answer contains the wrong number of significant digits. Your answer has the wrong algebraic sign. Your units are incompatible with those used by the teacher.
Units 
m/4
 
0.25*m
 
3
 0 ATNumSigFigs_WrongDigits. ATUnits_units_match.
Your answer contains the wrong number of significant digits.
Student is too exact
Units 
pi*s
 
3.14*s
 
3
 0 ATNumSigFigs_WrongDigits. ATUnits_units_match.
Your answer contains the wrong number of significant digits.
Units 
sqrt(2)*m
 
1.41*m
 
3
 0 ATNumSigFigs_WrongDigits. ATUnits_units_match.
Your answer contains the wrong number of significant digits.
Different units
Units 
25*g
 
0.025*kg
 
2
 1 ATUnits_compatible_units kg.
Units 
26*g
 
0.025*kg
 
2
 0 ATNumSigFigs_Inaccurate. ATUnits_compatible_units kg.
The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Units 
100*g
 
10*kg
 
2
 0 ATNumSigFigs_WithinRange. ATNumSigFigs_VeryInaccurate. ATUnits_compatible_units kg.
Units 
0.025*g
 
0.025*kg
 
2
 0 ATUnits_compatible_units kg. ATUnits_correct_numerical.
Please check your units carefully.
Units 
1000*m
 
1*km
 
2
 1 ATNumSigFigs_WithinRange. ATUnits_compatible_units m.
Units 
1*Mg/10^6
 
1*N*s^2/(km)
 
1
 1 ATUnits_compatible_units kg.
Units 
1*Mg/10^6
 
1*kN*ns/(mm*Hz)
 
1
 1 ATUnits_compatible_units kg.
Units 
3.14*Mg/10^6
 
%pi*kN*ns/(mm*Hz)
 
3
 1 ATUnits_compatible_units kg.
Units 
3.141*Mg/10^6
 
%pi*kN*ns/(mm*Hz)
 
3
 0 ATNumSigFigs_WrongDigits. ATUnits_compatible_units kg.
Your answer contains the wrong number of significant digits.
Units 
4.141*Mg/10^6
 
%pi*kN*ns/(mm*Hz)
 
3
 0 ATNumSigFigs_WrongDigits. ATNumSigFigs_VeryInaccurate. ATUnits_compatible_units kg.
Your answer contains the wrong number of significant digits.
Units 
400*cc
 
0.4*l
 
2
 1 ATNumSigFigs_WithinRange. ATUnits_compatible_units m^3.
Units 
400*cm^3
 
0.4*l
 
2
 1 ATNumSigFigs_WithinRange. ATUnits_compatible_units m^3.
Units 
400*ml
 
0.4*l
 
2
 1 ATNumSigFigs_WithinRange. ATUnits_compatible_units m^3.
Units 
18*kJ
 
18000.0*J
 
2
 1 ATUnits_compatible_units (kg*m^2)/s^2.
Units 
18.1*kJ
 
18000.0*J
 
2
 0 ATNumSigFigs_WrongDigits. ATUnits_compatible_units (kg*m^2)/s^2.
Your answer contains the wrong number of significant digits.
Units 
120*kWh
 
0.12*MWh
 
2
 1 ATUnits_compatible_units (kg*m^2)/s^2.
Units 
2.0*hh
 
720000*s
 
2
 1 ATUnits_compatible_units s.
Units 
723*kVA
 
0.723*MVA
 
3
 1 ATUnits_compatible_units VA.
Edge case
Units 
0*m/s
 
0*m/s
 
1
 1 ATUnits_units_match.
Units 
0.0*m/s
 
0*m/s
 
1
 1 ATUnits_units_match.
Units 
0*m/s
 
0.0*m/s
 
1
 1 ATUnits_units_match.
Units 
0.00*m/s
 
0.0*m/s
 
2
 1 ATUnits_units_match.
Units 
0.0*km/s
 
0.0*m/s
 
1
 1 ATUnits_compatible_units m/s.
Units 
0.0*m
 
0.0*m/s
 
1
 0 ATUnits_incompatible_units. ATUnits_correct_numerical.
Your units are incompatible with those used by the teacher. Please check your units carefully.
Units 
0.0
 
0.0*m/s
 
1
 0 ATUnits_SA_no_units.
Your answer must have units.
Imperial
Units 
7*in
 
7*in
 
1
 1 ATUnits_units_match.
Units 
6*in
 
0.5*ft
 
1
 1 ATUnits_compatible_units in.
Units 
2640*ft
 
0.5*mi
 
4
 1 ATNumSigFigs_WithinRange. ATUnits_compatible_units in.
Units 
2650*ft
 
0.5*mi
 
4
 0 ATNumSigFigs_WithinRange. ATNumSigFigs_VeryInaccurate. ATUnits_compatible_units in.
TO-DO
Units ! 
142.8*C
 
415.9*K
 
4
 -3 ATNumSigFigs_VeryInaccurate. ATUnits_incompatible_units.
Your units are incompatible with those used by the teacher.
Units ! 
520*mamu
 
520*mamu
 
3
 -3 ATUnits_SB_no_units.
The answer test failed to execute correctly: please alert your teacher.
Units 
-9.82*m/s^2
 
stackunits(-9.815,m/s^2)
 
3
 1 ATUnits_units_match.
Units 
-9.81*m/s^2
 
stackunits(-9.815,m/s^2)
 
3
 0 ATNumSigFigs_Inaccurate. ATUnits_units_match.
The accuracy of your answer is not correct. Either you have not rounded correctly, or you have rounded an intermediate answer which propagates an error.
Units 
-9.82*m/s^2
 
stackunits(displaydp(-9.815,3)
,m/s^2)
 
3
 1 ATUnits_units_match.
Units 
-9.82*m/s^2
 
stackunits(displaysf(-9.815,4)
,m/s^2)
 
3
 1 ATUnits_units_match.