Free points 2 Final Multiple choice: Select only one answer (4 pts each) 1. You

Question

Free points 2 Final Multiple choice: Select only one answer (4 pts each) 1. You measured the mass of a metal ball to be 2.000 kg and its volume to be 5.00 L What is divided by volume. (a) 4 × 10-1 kg (b) 4.00 × 10-kg/L (c) 4,000 × 10-1 kg. (d) 4.0 × 10-1 kg/L 2. What is 2.00+0.001 to the correct number of signficant figures? (a) 2.001 (b) 2 (c) 2.0 (d) 2.00 3. Let A 1oi +3.0) and B-40i-50)-1.0k. Find C-A-B (a) C = 5.0-2.0-1.0k (b) C 30i+8.0) +10k (c) C = 3,01-80j +1.0k (d) None of the above arwhich is 15 -Ahryo in your car, you drive back to your starting point at 30. mi's You arrive back at your starting point exactly 300. seconds afher you started. How fast were yos walking? (a) 3.0 m/s (b) 5.0 m/s (c) 6.0 m/s (d) 4.0 m/s 4. You walk a brisk pace in a straight line to get y

Explanation / Answer

1) m = 2.000 kg

    V = 5.0 L

Density = m/V = 2.000/5 = 0.4 kg/L = 4*10^-1 kg/L (Option A)

2) option a)

3) A = 1.0 i^ + 3.0j^

     B = 4.0i^ - 5.0j^ - 1.0k^

     C = A – B = -3.0i^ + 8.0j^ + 1.0k^    (option b)

4) time taken by car = 1500/30 = 50 sec

    Time taken during walk = 300 – 50 = 250 sec

     Speed = 1500/250 = 6.0 m/s    (option c)

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.