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Refer to your class notes to help you answer the following questions.
Questions and Answers
1.
Which of the following is NOT a metric unit?
A.
Fahrenheit
B.
Gram
C.
Liter
D.
Meter
Correct Answer
A. Fahrenheit
Explanation Fahrenheit is not a metric unit because it is a unit of measurement used to quantify temperature in the Imperial system. The metric system uses Celsius as its unit for measuring temperature. Gram, liter, and meter are all metric units used to measure mass, volume, and length respectively.
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2.
3 Kilometers = ________ meters
Correct Answer 3000 3,000
Explanation The question asks for the conversion of 3 kilometers to meters. The correct answer is 3000 or 3,000. This is because there are 1000 meters in 1 kilometer, so to convert kilometers to meters, you need to multiply the number of kilometers by 1000. In this case, 3 kilometers multiplied by 1000 equals 3000 meters.
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3.
2000 milliliters = ________ liters
Correct Answer 2 2.0
Explanation To convert milliliters to liters, we divide the value in milliliters by 1000. Therefore, 2000 milliliters is equal to 2 liters. The answer can be expressed as both 2 and 2.0 since they represent the same value in liters.
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4.
3.4 hectograms = ________ grams
Correct Answer 340 340.0
5.
36 centimeters = ________ meters
Correct Answer 0.36 .36
Explanation The answer is 0.36 or .36 because 1 meter is equal to 100 centimeters. To convert centimeters to meters, we divide the number of centimeters by 100. In this case, 36 centimeters divided by 100 equals 0.36 or .36 meters.
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6.
3.9 kilograms = ______ decigrams
Correct Answer 39000 39,000
Explanation The given question asks for the conversion of 3.9 kilograms into decigrams. To convert kilograms to decigrams, we need to multiply the given value by 10,000 since there are 10 decigrams in 1 kilogram. Therefore, 3.9 kilograms is equal to 39,000 decigrams.
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7.
Correct Answer 43 mL 43.0 mL 43 ml 43.0 ml 43ml 43.0ml 43mL 43.0mL 43 mililiters 43.0 mililiters
8.
Give your answer to this question with then correct number of significant figures.
(3.2 mL) - (2.3216 mL) =
Correct Answer 0.9 mL .9 mL 0.9mL .9mL
Explanation The correct answer is 0.9 mL because when subtracting two numbers, the result should have the same number of decimal places as the number with the fewest decimal places. In this case, both numbers have one decimal place, so the result should also have one decimal place.
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9.
Give your answer to this question with then correct number of significant figures.
(7.2 g) * (6.12 g) =
Correct Answer 44 g 44g
Explanation The product of 7.2 g and 6.12 g is 44 g. The answer is given as 44 g, which is the correct number of significant figures.
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10.
Give your answer to this question with then correct number of significant figures. (Watch the units!)
(2.122 kilometers) - (2.0 meters) = _______ kilometers
Correct Answer 2.120
Explanation The given question asks for the subtraction of 2.0 meters from 2.122 kilometers. To perform the subtraction, we need to convert the units to the same. Since 1 kilometer is equal to 1000 meters, we can convert 2.122 kilometers to meters by multiplying it by 1000. This gives us 2122 meters. Now, we can subtract 2.0 meters from 2122 meters, which equals 2120 meters. Finally, we convert the result back to kilometers by dividing it by 1000, giving us 2.120 kilometers.
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11.
Find the total distance traveled:
2 meters South and 5 meters South
Correct Answer 7 meters 7 m 7.0 meters 7.0 m
Explanation The total distance traveled is 7 meters because both distances given are in the same direction, South. Therefore, we can simply add the magnitudes of the distances, which are 2 meters and 5 meters, to get a total of 7 meters.
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12.
Find the total displacement traveled:
2 meters South and 5 meters South
Correct Answer 7 meters 7 m 7.0 meters 7.0 m
Explanation The total displacement traveled is 7 meters because both distances are in the same direction (South) and can be added together.
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13.
Find the total distance traveled:
2 meters South and 5 meters North
Correct Answer 7 meters 7 m 7.0 meters 7.0 m
Explanation The total distance traveled can be found by adding the distances traveled in each direction. In this case, the person traveled 2 meters south and then 5 meters north. Since the person traveled in opposite directions, the distance traveled is the difference between the two distances, which is 5 - 2 = 3 meters. Therefore, the correct answer is 7 meters, 7 m, 7.0 meters, 7.0 m.
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14.
Find the total displacement traveled:
2 meters South and 5 meters North
Correct Answer 3 meters 3 m 3.0 m 3.0 meters
Explanation The total displacement traveled can be found by subtracting the distance traveled in the opposite direction from the distance traveled in the desired direction. In this case, 2 meters South and 5 meters North cancel each other out, resulting in a net displacement of 3 meters North. Therefore, the correct answer is 3 meters, 3 m, 3.0 m, or 3.0 meters.
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15.
Calculate the total displacement traveled (Hint: you may need graph paper):
4 meters North and 3 meters East
Correct Answer 5 meters 5 m 5.0 meters 5.0 m
Explanation The total displacement traveled can be calculated using the Pythagorean theorem. The person traveled 4 meters north and 3 meters east, which forms a right triangle. The hypotenuse of this triangle represents the total displacement. By using the Pythagorean theorem (a^2 + b^2 = c^2), where a and b are the lengths of the legs of the triangle, we can find that the total displacement is 5 meters.
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