Lesson Two: Mathematics and Physics | Comprehensive Answer Key Physics Support Guide — 100% English Edition This worksheet covers fundamental SI units, derived quantities, metric prefixes, unit conversions, dimensional analysis, and the rules of significant figures in physics.
🏆 انضم إلى التحدي واحصل على ترتيبك
اختبار شهادة تدريبي مؤقت للصف والمادة والفصل نفسه.
اختر إجابة لكل سؤال لتظهر النتيجة والتفسير فورًا، وتظهر درجتك بعد الانتهاء. الأسئلة من إعداد المدرس، أما الإجابات فحُدّدت بالذكاء الاصطناعي وقد تحتمل الخطأ؛ يمكنك الإبلاغ عبر أيقونة العلم بجانب السؤال.
Which of the two speeds is greater: (140 km/h) or (40 m/s)?
Explanation
140 km/h / 3.6 = 38.9 m/s. Comparing 38.9 m/s to 40 m/s shows that 40 m/s is larger.
Question 17
17
Points: 1
A time interval is (4.0 × 10-3 s). Which of the following correctly expresses this interval using prefixes?
Explanation
The factor 10-3 corresponds to the prefix milli- (m), so 4.0 × 10-3 s = 4.0 ms.
Question 18
18
Points: 1
Which of the following values is equal to 86.2 cm?
Explanation
86.2 cm = 0.862 m = 8.62 × 10-4 km.
Question 19
19
Points: 1
Based on the equation: y = (6.0 m/s) + (3.0 m/s2)x. What physical quantity is represented by the symbol x, and what is its unit of measurement in this equation?
Explanation
For terms to be added, their units must match. (m/s2) × s = m/s, which matches the first term. Thus x is time in seconds.
Question 20
20
Points: 1
Dimensional Analysis: Which of the following equations is dimensionally correct based on velocity (v = d/t) and acceleration (a = v/t)?
Explanation
LHS: (m/s2) × m = m2/s2. RHS: (m/s)2 = m2/s2. Both sides are identical.
Question 21
21
Points: 1
Which of the following formulas is mathematically equivalent to the kinetic energy equation $E = \frac{1}{2} m v^2$ (solved for mass m)?
Explanation
Multiplying both sides by 2 gives 2E = mv2. Dividing by v2 gives m = 2E/v2.
Question 22
22
Points: 1
What is the number of significant figures in the measurement 0.005041 m?
Explanation
Leading zeros are not significant. The digits 5, 0, 4, 1 are significant.
Question 23
23
Points: 1
What is the number of significant figures in the measurement 2.002 m?
Explanation
Zeros between non-zero digits are always significant. All 4 digits are significant.
Question 24
24
Points: 1
What is the number of significant figures in the measurement 0.0021 m?
Explanation
Leading zeros are not significant. Only 2 and 1 are significant.
Question 25
25
Points: 1
What is the number of significant figures in the measurement 0.005041 m?
Explanation
Leading zeros (0.00) are not significant. The digits 5, 0, 4, and 1 are significant.
Question 26
26
Points: 1
What is the sum of: (0.5643 + 2.15 + 56), taking into account the correct number of significant figures?
Explanation
In addition, the result must match the term with the fewest decimal places. 56 has 0 decimals, so $58.7143 \to 59$.
Question 27
27
Points: 1
Mariam measured 46.00 mL of a liquid and then added 1.20 L of water. What is the final volume of the mixture in Liters (L)?
Explanation
46.00 mL = 0.04600 L. 1.20 L + 0.04600 L = 1.24600 L. Rounding to 2 decimal places (matching 1.20) gives 1.25 L.
Question 28
28
Points: 1
What is the area of a square sheet of paper with dimensions 3.6 cm × 3.6 cm, taking into account significant figures?
Explanation
3.6 × 3.6 = 12.96. Since each factor has 2 sig figs, the result must be rounded to 2 sig figs, which is 13.
Result Tracking
Answered0 / 28
Correct Answers0
Wrong Answers0
Current Percentage0%
Quiz Completed
This is your final result after answering all questions.
Final Result
0/280%
Correct Answers0
Wrong Answers0
Answered Questions0 / 28
Total Possible Points28
You can reopen the page to start again.
يمكنك تسجيل الدخول لحفظ سجل محاولاتك، معرفة أخطائك المتكررة، والحصول على نصائح مخصصة. تسجيل الدخول باستخدام Google
Here are more quizzes for الصف التاسع المتقدم by الفصل الأول and subject فيزياء
This section is rendered only when the user reaches it while scrolling.
...
🍪
إشعار ملفات تعريف الارتباط
يستخدم هذا الموقع ملفات تعريف الارتباط لتحسين تجربة التصفح وقياس الأداء وعرض المحتوى بشكل أفضل.
باستخدامك للموقع فإنك توافق على استخدامنا لها وفق
سياسة الخصوصية.
