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| Heading # | Formula answers written in an algebraic language: Qcmath. |
| Introduction # | QCmath
is a language for answering a question [or part of a question] with
either an algebraic expression or a function call with expressions as
operands. Notice that answers must be expressions, for example b + c, not complete formulas like a = b + c. Likewise when the answer is a function call. You can write for example sqrt(x^2+y^2) but not z = sqrt(x^2+y^2). This quiz is about two well known formulas. It illustrates the two ways you can write a formula answer in QCmath. You may answer the questions one at the time in any order. |
| Intro_repeat_0_1 # | 0 |
| Qstn_name_number_1 # | Einstein. |
| Qstn_phrase_1 # |
One of the most famous formulas is Albert Einsteins which for an object
in motion expresses the internalized energi by the its mass m and the
speed of light c. Write (not the formula but) the expression for e in the variables m and c: |
| Correct_answer_1 # | !qcmath m*c^2 |
| Hints_1 # | The expression contains only m and c (and possibly the number 2). Use the operator ^ for power. Try with the operator * (and m and c). The answer is often written m*c^2 but try, for example, c*m*c. |
| Reward_1 # | Correct. Try other ways of writing the expression. |
| Qstn_name_number_2 | Pythagoras. |
| Qstn_phrase_2 | Another well-known formula is often ascribed to the famous Greek mathematician Pythagoras, although it was actually known earlier in China. The formula applies to a right-angled triangle and expresses the length of the long side (the hypotenuse) to the two smaller sides. Write this expression when the smaller sides have lengths a and b and square root is expressed with the function call sqrt(): |
| Correct_answer_2 | !qcmath sqrt( a*a + b^2) |
| Hints_2 | A possible answer is: sqrt( a*a + b^2), but try other equivalent expressions. |
| Reward_2 | Correct. Try answering with other equivalent expressions. |
| Qstn_name_number_3 | 3 |
| Qstn_phrase_3 | |
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| Qstn_name_number_4 | 4 |
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| Qstn_name_number_5 | 5 |
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| Qstn_name_number_6 | 6 |
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| Qstn_name_number_7 | 7 |
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| Qstn_name_number_8 | 8 |
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| Qstn_name_number_9 | 9 |
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| Reward_9 | |
| Qstn_name_number_10 | 10 |
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| Specs_from_quiz # | |
| Specify in the following entry fields your own texts for communication with answerers. For quizzes being created using a schema not containing such specifications you can obtain the same effect by referring to a quiz created with this schema. | |
| Text_before_qstn_number # | |
| Text_after_qstn_number # | |
| Field_dimensions # | 30 60 6 |
| Text_before_submit_button # | When ready click this button: |
| Text_on_submit_button # | SUBMIT THIS FORM |
| Text_before_answer_count_pr_qstn # | This question answered correctly with answer number %%. |
| Text_all_qstns_answered_correctly # | Congratulations! you have answered all questions correctly. Number of incorrect answers: %%. |
| Text_this_qstn_answered_correctly # | |
| Text_one_qstn_answered_but_incorrectly # | You answered one question but the answer was incorrect. Therefore only that question is presented again (the remaining questions will be presented thereafter): |
| Text_more_qstns_answered_incorrectly # | The following questions were answered incorrectly or not answered at all: |
| Text_on_printing_answer # | Click browsers print option for a copy of this form including your answers. |
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| Text_bad_type_or_format_of_answer # | Answer or answer part is of wrong type or has a bad format: |
| Text_final_message # | |
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