Conversiones

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 100 mL is equivalent to which of the following? 1) _______ A) 0.1 L B) 0.01 ML C) 1 kL D) 10-6 µL 2) How many grams is forty milligrams? A) 0.0 40 g B) 40000 g C) 0.0000 40 g D) 0.000 40 g 3) How many meters is sixty kilometers? A) 600,000 m B) 60 m C) 60,000 m D) 0.0 6 m 4) 1 angstrom =10-10 m and 1 fermi = 10-15 m, what is the relationship between these units? A) 1 angstrom = 105 fermi B) 1 angstrom = 10+25 fermi C) 1 angstrom = 10-5 fermi D) 1 angstrom = 10-25 fermi 5) 0.00325 × 10-8 cm can also be expressed in mm as A) 3.25 × 10-12 mm. B) 3.25 × 10-10 mm. C) 3.25 × 10-9 mm. D) 3.25 × 10-11 mm. 6) Which one of the following is not equivalent to 2.50 miles? (1 mi = 1.609 km = 5280ft, 1 ft = 12 in.) A) 4.40 × 103 yd B) 4.02 × 103 km C) 1.32 × 104 ft D) 1.58 × 105 in. 7) If you are 5'10'' tall, what is your height in meters? (1 in = 2.54 cm.) A) 1.6 m B) 1.5 m C) 1.8 m D) 1.7 m 8) If 1 inch = 2.54 cm, and 1 yd = 36 in., how many meters are in 7.00 yd? 2) _______

3) _______

4) _______

5) _______

6) _______

7) _______

3 A) 1.78 × 10 m
B) 6.40 m C) 640 m D)36.3 m

8) _______

9) A hot air balloon rises to an altitude of 600 fathoms. What is this height, in feet? (1 fathom = 6 ft.) A) 100 ft B) 1200 ft C) 3600 ft D) 600 ft

9) _______

10) The average life of an animal is 70 years. Assume one numerical figure, write this in power of ten in seconds. 10) ______ 7s A) 3 × 10 B) 2 × 107 s C) 3 × 109 s D) 2 × 109 s 11) The mass of an electron is9.1 × 10-31 kg. How many electrons will make a mass of 1.0 kg? A) 1.1 × 1031 B) 9.1 × 1031 C) 9.1 × 1030 D) 1.1 × 1030 12) How many m/s is 50 mi/h equivalent to? (1 mi = 1609 m.) A) 2.2 m/s B) 49 m/s C) 22 m/s D) 45 m/s 13) How much longer (percentage) is a 100 m dash than a 100 yd dash? (1 yd = 0.9146 m.) A) 6.5% B) 3.5% C) 12% D) 8.5% 14) Which is the largest area? A) 2,500,000 cm2 B) 0.75 m2 C)100,000 cm2 D) 7.5 m2 15) If 1 inch = 2.54 cm, how many square centimeters are in 1.00 square in.? A) 2.54 B) 1.59 C) 5.08 D) 6.45 11) ______

12) ______

13) ______

14) ______

15) ______

16) Express the following sum with the correct number of significant figures: 1.00 kg + 1531 g + 2.54 × 104 mg. 16) ______ A) 2.53 kg B) 2.79 kg C) 27.9 kg D) 2.56 kg

17) A football field is 120yd long and 50 yd wide. What is the area of the football field, in m2, if 1 yd = 91.44 cm? 17) ______ A) 3.7 × 103 m2 B) 4.2 × 103 m2 C) 5.0 × 103 m2 D) 2.4 × 103 m2 18) A ball has a radius of 3.23 cm. What is the volume of the ball in m3? A) 1.41 × 10-4 B) 4.23 C) 4.23 × 10-4 D) 1.41 18) ______

19) A thick-walled metal pipe of length 20.0 cm has an inside diameter of 2.00 cm and an outsidediameter of 2.40 cm. What is the total surface area of the pipe, counting the ends, in m2? 19) ______ A) 278 B) 276 C) 277 D) 279 20) The radius of the Earth is 3963 mi. What is the surface area of the Earth in square meters? (1 mi = 1609 m.) 20) ______ A) 4.9 × 107 m2 B) 2.6 × 1014 m2 C) 1.3 × 1014 m2 D) 5.1 × 1014 m2 21) The average density of blood is 1.06 × 103 kg/m3. If you donate a pint ofblood to the Red Cross, what mass of blood have you donated, in grams? (1 pt = 1/2 L, 1 L = 1000 cm3.) 21) ______ A) 530 g B) 5300 g C) 5.30 × 105 g D) 0.530 g 22) The mass of Mars, 6.40 × 1023 kg, is about one-tenth that of the Earth, and its radius, 3395 km, is about half that of Earth. What is the mean density of Mars in kg/m3? 22) ______ A) 1.95 × 103 B) 9.76 × 102 C) 7.81 × 103 D) 3.90 × 103 23)Concrete is sold by the cubic yard. What is the mass, in kilograms, of one cubic yard of concrete that is five times as dense as water? (1 m = 1.094 yd, and 1 m3 of water has a mass of 1,000 kg.) 23) ______ A) 764 kg B) 6.55 × 103 kg C) 3.82 × 103 kg D) 2.42 × 103 kg

24) An average human has a heart rate of 70 beats per minute. If someone's heart beats at that average rate over a 70-yr...