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🔴تجميعات كهربية مغناطيسية 1🔴👆

🔴تجميعات كهربية مغناطيسية 1🔴

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Choose the correct answer for all questions: 1. In the International system of units (SI), the Length is measured in:     A) Centimetre (cm)     B) Meter (m)     C) Kilogram (kg)     D) Feet (ft)  2. 3.5 MW in standard scientific notation can be expressed as:     A) 3.5 * 10^6 W     B) 3.5 * 10^9 W     C) 3.5 * 10^-6 W     D) 3.5 * 10^-9 W  3. Convert 120 inches to centimeters (given 1 in = 2.54 cm):     A) 54.8 cm     B) 100.8 cm     C) 254.8 cm     D) 304.8 cm  4. Assuming that olive oil has a density of 0.9 g/cm³, what is the density in kg/m³? (Given that 1 g = 1 * 10^-3 kg and 1 cm³ = 10^-6 m³):     A) 95.4 kg/m³     B) 510.6 kg/m³     C) 900 kg/m³     D) 957.2 kg/m³  5. In the British system of units, the Mass is measured in:     A) Gram (g)     B) Pound (lb)     C) Kilogram (kg)     D) Feet (ft)  6. The number 4,100,000,000 W, in standard scientific notation can be expressed as:     A) 4.1 * 10^9 W     B) 4.1 * 10^-9 W     C) 4.1 x 10 W     D) 4.1 W  7. 2.3 * 10^-6 is equal to:     A) 2.3 Gs     B) 2.3 Ms     C) 2.3 ns     D) 2.3 με  8. Given that 1 yard = 3 feet, then 120 feet equals:     A) 120 yards     B) 40 yards     C) 360 yards     D) 300 yards 9. A car is traveling at 110 km/h. What is its speed in m/s?     A) 30.56 m/s     B) 45.5 m/s     C) 50.22 m/s     D) 110 m/s  10. The graph represents the relationship between velocity and time for an object moving in a straight line. Which of the following statements is true?      A) The object moves with a constant velocity      B) The object speeds up      C) The object slows down      D) The object stays at rest  11. If an object is moving at a constant speed of 120 km/h, then its acceleration is:      A) 120 km/(h²)      B) positive      C) negative      D) zero  12. A car starts moving from rest with a constant acceleration of 2 m/(s²). How long does the car take to travel a distance of 400 m?      A) 10.2 s      B) 14.14 s      C) 16.12 s      D) 20.00 s  13. In the last question, what is the car's final velocity at this point?      A) 8.28 m/s      B) 18.28 m/s      C) 28.08 m/s      D) 40.00 m/s  14. If a particle moves from x₁ = 5 m to x₂ = 121 m, then the displacement is:      A) 5 m      B) 12 m      C) 7 m      D) 17 m 15. The change in velocity over time is called:     A) Acceleration     B) Average Velocity     C) Speed     D) Power  16. If a particle's position is given by  x = 3t² + t  (where  t  is in seconds and  x  is in meters), what is its position at  t = 2 ?     A) 14 m     B) 28 m     C) 41 m     D) 72 m  17. In the previous question, what is the particle's velocity at  t = 2 ?     A) 30 m/s     B) 13 m/s     C) 33 m/s     D) 31 m/s  18. A ball is thrown vertically with an initial speed of 10 m/s. What is its speed at the highest point?     A) 10 m/s     B) 9.8 m/s     C) 0 m/s     D) 20 m/s  19. A car moving with an initial velocity of 5 m/s accelerates to a final velocity of 15 m/s while traveling a distance of 25 m. What is the acceleration of the car?     A) 4 m/s²     B) 2 m/s²     C) 5 m/s²     D) 3 m/s²  20. Vectors have... Examples include displacement, force, and acceleration.     A) magnitude     B) direction     C) magnitude and direction     D) magnitude and unit  21. Given  A⃗ = 3^i + 4^j - 2^k  and  B⃗ = 5^i - 2^j + 4^k , what is  A⃗ + B⃗ ?     A)  8^i + 2^j + 2^k      B)  5^i - 3^j + 2^k      C)  3^i + 4^j + 2^k      D)  5^i - 2^j + 2^k   22. Given  A⃗ = 3^i - 4^j  and  B⃗ = -2^i + 3^j , what is  A⃗ ⋅ B⃗ ?     A) -3     B) -10     C) -18     D) -20

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