Expert: Steve Holleran - 5/22/2008

Question
Q1.The unit 10 m  is equivalent to  (A) 1 hm.   (B) 1 dam.  (C) 100 cm.  (D) 100 mm.
Q2. The SI prefix that means 1,000 times smaller than the base unit is (A) milli.  (B) centi.  (C) kilo.  (D) deca.
Q3. Convert 15 cg to miligrams
Q4.Which one of the following measurements represent the longest distance? (A) 50 mm (B) 10 cm  (C) 5 m   (D) 1 km
Q5. On a construction site, the workers excavated 30,000 cubic feet of dirt. How many cubic meters did they excavate?
Q6.Which one of the SI units is used to measure current?
Q7.If an object travels 400 m  in 253 s, what is its speed in m/s?
Q8.If you were to say that a material has 2,000 kg per cubic meters, you would be referring to its (A) volume. (B) mas  (C) temperature   (D)  density
Q9.The force on an area 16 m by 12 m is 24,000 N. What is the pressure per square meter. (careful here, you would need two calculations).
Q10.which one of the following symbols represents a unit smaller than a meter? (A) cm  (B) km  (C) hm  (D)  dam

Answer
Hi Max,

This is quite a few questions!  Let's see what we can do.

1.  1 dam = 10 m, so the answer is B

2.  A -- milli

3.  15 cg = 150 mg

4.  1 km is the longest.  Its 1000 meters

5.  To convert cubic feet to cubic meters, you need to multiply by 0.028,  so 30000 * 0.028 = 840 cubic meters

6.  Far as I know, current is measured in amperes

7.  400/253 = 1.581 m/ sec

8.  D

9.  24,000 / (16 * 12) = 24000 / 192 = 125 N/m^2

10.  cm  -- there are 100 cm in a meter

Steve