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Science in Context / Wetenskap in Konteks - 179

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How many significant figures are in the number 0.0100

Hoeveel beduidende syfers is daar in die getal 0.0100

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How many significant figures are in the number 4500.1?

Hoeveel beduidende syfers is daar in die getal 4500.1?

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How many significant figures are in the number 450 000?

Hoeveel beduidende syfers is daar in die getal 450 000?

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How many significant figures are in the number 450 050?

Hoeveel beduidende syfers is daar in die getal  450 050?

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How many significant figures are in the number 0.00450?

Hoeveel beduidende syfers is daar in die getal 0.00450?

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1 mm of rainfall means that every square meter area is filled with 1 mm height of rain. Thus 1 mm of rainfall actually means that every square meter receives a volume of (1000 x 1000 x 1) 106 mm3 of rain. So we can write: 1 mm of rainfall = 106 mm3 m-2. Convert 0.042 mm of rainfall to milliliters per square centimeter (ml cm-2). 1 liter= 1000 milliliters. 1 liter = 1 dm3. 1 dm = 10 cm. (Choose appropriate units from the drop-down menu. Use a full stop and not a comma for your decimal point. Do not use scientific notation.)

1 mm reënval beteken dat elke vierkante meter area met 1 mm hoogte reën gevul is. 1 mm reënval beteken dus eintlik dat elke vierkante meter 'n volume van (1000 x 1000 x 1) 106 mm3 reën ontvang. Ons kan dus skryf: 1 mm reënval = 106 mm3 m-2. Skakel 0.042 mm reënval om na milliliter per vierkante sentimeter (ml cm-2). 1 liter = 1000 milliliter. 1 liter = 1 dm3. 1 dm = 10 cm. (Kies toepaslike eenhede van die aftreklys. Gebruik 'n punt vir jou desimale teken en nie 'n komma nie. Moenie wetenskaplike notasie gebruik nie.)

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The concentration of hydrochloric acid (HCl) in a particular solution is 117 moles per litre (mol l-1). Convert this to grams per cubic centimeter (g cc-1 or g cm-3). The molar mass of HCl is 36.46 grams per mole. 1 litre = 1 cubic decimeter (1 dm3). 1 dm = 10 cm. Answer to one decimal place. (Choose appropriate units from the drop-down menu. Use a full stop and not a comma for your decimal point. Do not use scientific notation.)

Die konsentrasie soutsuur (HCl) in 'n bepaalde oplossing is 117 mol per liter (mol l-1). Skakel dit om na gram per kubieke sentimeter (g cc-1 of g cm-3). Die molêre massa van HCl is 36,46 gram per mol. 1 liter = 1 kubieke desimeter (1 dm3). 1 dm = 10 cm. Antwoord tot een desimale plek. (Kies toepaslike eenhede van die aftreklys. Gebruik 'n punt vir jou desimale teken en nie 'n komma nie. Moenie wetenskaplike notasie gebruik nie.)

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In the United States it is common to measure pressure in units of "pounds per square inch" or "psi". Convert 1.3 psi to Newtons per square decimeter (N dm-2). 1 pound-force = 4.45 N. 1 m = 10 dm. 1 inch = 2.54 cm. Answer to one decimal place. (Choose appropriate units from the drop-down menu. Use a full stop and not a comma for your decimal point. Do not use scientific notation.)

In die Verenigde State gebruik hulle verskillended eenhede vir druk: "pond per vierkante duim" of "psi". Skakel 1.3 psi om na Newton per vierkante desimeter (N dm-2). 1 pond-krag = 4,45 N. 1 m = 10 dm. 1 duim = 2,54 cm. Antwoord tot een desimale plek. (Kies toepaslike eenhede van die aftreklys. Gebruik 'n punt vir jou desimale teken en nie 'n komma nie. Moenie wetenskaplike notasie gebruik nie.)

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Convert 1.1 cubic feet (1.1{ ft3) to liters. 1 foot = 0.3048 meters. 1 liter = 1 dm3. 1 m = 10 dm. Answer to one decimal place. (Choose appropriate units from the drop-down menu. Use a full stop and not a comma for your decimal point. Do not use scientific notation.)

Skakel 1.1 kubieke voet (1.1{ ft3) om na liters. 1 voet = 0,3048 meter. 1 liter = 1 dm3. 1 m = 10 dm. Antwoord tot een desimale plek. (Kies toepaslike eenhede van die aftreklys. Gebruik 'n punt vir jou desimale teken en nie 'n komma nie. Moenie wetenskaplike notasie gebruik nie.)

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Convert 44 cubic feet (44 ft3) to cubic meters (m3). 1 foot = 0.3048 meters. (Choose appropriate units from the drop-down menu. Use a full stop and not a comma for your decimal point. Do not use scientific notation.)

Skakel 44 kubieke voet (44 ft3) om na kubieke meter (m3). 1 voet = 0,3048 meter. (Kies toepaslike eenhede van die aftreklys. Gebruik 'n punt vir jou desimale teken en nie 'n komma nie. Moenie wetenskaplike notasie gebruik nie.)

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