1. A car is speeding down the road at 85 mi/h. In SI units, this is (a) 38 m/s (
ID: 2299738 • Letter: 1
Question
1. A car is speeding down the road at 85 mi/h. In SI units, this is
(a) 38 m/s
(b) 40 m/s
(c) 42 m/s
(d)44 m/s
2. A car completes a 500-mile race in 3 hours, 8 minutes. Its average speed is
(a) 63 m/s
(b) 67 m/s
(c) 71 m/s
(d) 75 m/s
3. How many significant figures are in the quantity 16.500 m?
(a) 2
(b) 3
(c) 4
(d) 5
4. How many significant figures are in the quantity 0.0053 g?
(a) 2
(b) 3
(c) 4
(d) 5
5. Expressed with the correct number of significant figures, what is the volume of a rectangular room that measures 12.503 m by 10.60 m by 9.5 m?
(a) 1300 m^3
(b)1260 m^3
(c) 1259 m^3
(d) 1259.1 m^3
6. The density of aluminum is 2.70 g/cm^3. Express this in kg/m^3
7. Find the area of a right triangle with sides 15.0 cm, 20.0 cm and 25.0 cm. Express your answer with the correct number of significant figures.
8. Using calipers, you can find that an aluminum cylinder has length 8.625 cm and diameter 1.218 cm. An electronic pan balance shows that its mass is 27.13 g. Find the cylinder's density.
Explanation / Answer
1. (a) 38 m/s
2. (c) 71 m/s
3. (d) 5
4. (a) 2
5. (d) 1259.1 m^3
6. 2700 kg / m3
7. 7.5 *10^2
8. 2.699 g/cm^3
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