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GENERAL PHYSICS 1 Worksheet No. 1 I. Read and understand each item and choose the letter of the correct answer. Write your answers on a separate sheet of paper. SHOW YOUR SOLUTION. 1. Which of the following is equivalent to half a meter? A. 500 cm B. 50 cm C. 100 mm D. 10 mm 2. A book has a mass of 500 g, how many kilograms does it weigh? A. 5 kg B. 1 kg C. 0.5 kg D. 0.25 kg 3. Which of the following has the smallest value? A. 29 cm B. 0. 0025 km C. 4.5 × 10−3 m D. 10,000 mm 4. The average thickness of the leg of an ant is 0.035 cm. How many millimeters is this? A. 35 mm B. 3.5 mm C. 0.0035 mm D. 0.35 mm 5. Which of the following relationships of quantities is TRUE? A. 200 g = 0.2 kg C. 1 kg < 900 g B. 5 000 g > 5 kg D. 0.5 kg = 5 000 g 6. Which of the following is the BEST example of a number expressed in scientific notation? A. 15.2 × 102 C. 0.71 × 10−2 B. 8.43 × 103 D. 0.039 × 10−3 7. What is 7.236 × 10−3 in standard form? A. 72.36 B. 0.7236 C. 0.007236 D. 0.07236 8. The speed of light in a vacuum is about 299, 800, 000 m/s. Which of the following values in scientific notation is its equivalent? A. 2.998 × 106 m/s C. 998 × 108 m/s B. 2.998 × 107 m/s D. 2.998 × 109 m/s 9. MOR radio station in Cagayan de Oro City operates at a frequency of 91.9 Mega Hertz. What is 91.9 × 106 Hz in standard form? A. 9, 190, 000 Hz C. 919, 000, 000 Hz B. 91, 900, 000 Hz D. 9, 190, 000, 000 Hz 10. Which of the following is equal to 0.051 × 10−3 ? A. 5.1 × 10−1 B. 5.1 × 10−4 C. 5.1 × 10−5 II. D. 5.1 × 10−6 Determine the number of significant figures of the values given below: 1. 0.0025 → ___________ 2. 12. 00030 → ___________ 3. 3.1416 → ___________ 4. 20.20 → ___________ 5. 0. 4 → ___________ III. Direction: Choose the best answer. Write it in capital letter on a separate sheet of paper. SHOW YOUR SOLUTION 1. What is the sum of 281.45 g, 361.1 g, and 5.301 g? Apply rules in significant figures. A. 648.9 g B. 648.85 g C. 648.850 g D. 648. 1 g 2. You are using an electronic stopwatch in one of your experiments in Physics. The digital reading displays along with accuracy to how may second? A. 0.01 𝑠 B. 0.1 𝑠 C. 0.10 𝑠 D. 1 𝑠 3. The density of aluminum is 2.7 𝑔⁄𝑐𝑚3 . An experiment in the laboratory was performed to measure the density of the material. The data in the choices below came from the four groups who performed. Which of the following measurements is most accurate? A. 2.068 𝑔⁄𝑐𝑚3 C. 709 𝑔⁄𝑐𝑚3 B. 2.698 𝑔⁄𝑐𝑚3 D. 2. 721 𝑔⁄𝑐𝑚3 4. The diameter of a certain virus is 0. 0000002 𝑚 as viewed under a microscope. How would this be expressed in scientific notation? A. 2.0 × 106 𝑚 C. 2.0 × 10−7 𝑚 B. 2.0 × 10−6 𝑚 D. 2.0 × 107 𝑚 5. Rio de Grande river has a total length of 505 𝑘𝑚. What is this length in 𝑚? C. 5.05 × 105 𝑚 D. 5.05 × 107 A. 50, 500 𝑚 B. 5, 050, 000 𝑚 6. A foreigner is driving his car along North Luzon Express way (NLEX) at a speed of 60 mi/h. Can he be charged off over speeding considering the maximum speed along this express way is 100 𝑘𝑚/ℎ. A. Yes, because 60 mi/h is beyond the maximum speed of 100 km/h. B. No, because 60 mi/h is less than the maximum speed of 100 km/h. C. No, because 60 mi/h is jus equal to the maximum speed of 100 km/h. D. Not enough data is given to determine if he is over speeding or not. 7. Which of the following sets of measurements are precise? A. 1.50 mm, 1.72 mm, 1. 09 mm, 1. 84 mm B. 0.9 cm, 0.95 cm, 0.80 cm, 0.63 cm C. 1.20 m, 1.02 m, 0.97 m, 1. 42 m D. 0.84 dm, 0.85, 0.82, 0.83 8. Which of the following relationships of quantities is NOT true? A. 2 Mm = 2 × 106 m B. 5 mg = 0.005 g C.10mg = 1 dg D. 8Gm = 8 × 109 m 9. Which of the following values is equivalent to 0.150 𝑚? A. 150 𝑚𝑚 B. 150 𝑐𝑚 C. 15 𝑑𝑚 D. 1 500 𝜇𝑚 10. What is 7.5 millimeters expressed in centimeters? A. 0.075 cm B 7.5 cm C. 0.75 cm D. 75 cm 11. The accepted value is 29.35. Which correctly describes this student’s experimental data? Trial 1 Measurement: 29.48 Trial 2 Measurement: 28.97 Trial 3 Measurement: 29.27 A. accurate but not precise C. both accurate and precise B. precise but not accurate D. neither accurate nor precise 12. Which is more: 15 kilograms or 15 000 grams? A. 15 kilograms C. they are the same B. 15 000 grams D. cannot be determined 13. How many milligrams are there in 11 grams? A. 110 B. 1 000 C. 110 000 14. What is the value of 200 ft3/min in mile3/day? A. 0.95×10-6 B. 0.95×106 C. 1.95×10-6 D. 11 000 D. 1.95×106 15. Mary bought a tank whose dimensions are 5.6 cm, 8.2 cm and 12.8 cm. What is the volume of water that can be stored in the tank? a. 585.8 cm³ B. 587.8 cm³ C. 590.8 cm³ D. 600.8 cm³