1. Convert 1.35 x 10° km² to Liters Answ: 1.35 x10" liters 2. Convert 30 µg /f° to kg/m³ NB: (lft = 12 inches, I inch = 2.54 cm) Answ: 1.06 x 10 kg/m² 3. An average human has a life expectancy of about 2 x 10° seconds (70 years). If a human's heart rate is 80 beats / min, determine the total number of beats a human would make in such a life time? Answ: 3 G beats

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1. Convert 1.35 x 10° km² to Liters
Answ: 1.35 x10" liters
2. Convert 30 ug / f° to kg/m³
NB: (Ift = 12 inches, 1 inch = 2.54 cm)
Answ: 1.06 x 10* kg/m²
3. An average human has a life expectancy of about 2 x 10° seconds (70 years). If a human's
heart rate is 80 beats / min, determine the total number of beats a human would make in such a
life time?
Answ: 3 G beats
4. A typical atom has a diameter of 1.0 Å, approximately how many of this atoms would fit on a
1.0 cm line. ( 1 Å = 10" m )
Answ: 0.01μ αtom
5. A certain liquid has a density of 0.789 g / cm³. What volume in cubic mm should be poured
into a graduated cylinder to give a mass of 19.8 g?
Answ: 2.51 x 10 mm²
6. A fish tank has dimensions of 20 inch x 20 inch x 10 inch. What's the maximum volume of
water, in millilitres, it can hold?
Answ: 6.555 x10ʻ m L
7. Calculate these numbers and express your answer in the correct decimal or significant
numbers.
0.0065 x 3.21 + 0.0911
Answ: No hint,.. duh O
8. A space object orbits the earth at 1.25 Mega miles per year. What's this speed in yards per
milliseconds.
Answ: 6.98 x 10° yards/milli-
sec
(NB: 5 % yards = 1 rod ; 40 rods = 1 furlong ; 8 furlongs = 1 mile)
9. Precious metals and gems are measured in troy weights in the English system:
NB:
24 grains = 1 pennyweight (exact) Answ: 1.9339 x10² dm², 1.9339 x10² nm²
20 реппунеight -I roy ounce (eхact)
12 troy ounces = 1 troy pound (exact)
1 grain = 0.0648 gram
Icarat = 0.200 gram
If the density of gold is 19.3 g/cm², what's the volume of a troy pound of gold?
Express the answer in:
(a) Cubic decimetre (dm³)
(b) Cubic nanometre directly from the answer in (a)
10. Apothecaries (druggists) use the following set of unit measurements in the English system:
Is an Apothecary grain the same as a troy grain? Refer to Q9 and the following:
( 20 grains apothecaries = 1 scruple; 3 scruples = Idram apothecary, 8 dram apothecaries = 1 oz
ароthecary : ldram aарothecary * 3.858g ).
Answ: No hint, duh!!. O
Transcribed Image Text:1. Convert 1.35 x 10° km² to Liters Answ: 1.35 x10" liters 2. Convert 30 ug / f° to kg/m³ NB: (Ift = 12 inches, 1 inch = 2.54 cm) Answ: 1.06 x 10* kg/m² 3. An average human has a life expectancy of about 2 x 10° seconds (70 years). If a human's heart rate is 80 beats / min, determine the total number of beats a human would make in such a life time? Answ: 3 G beats 4. A typical atom has a diameter of 1.0 Å, approximately how many of this atoms would fit on a 1.0 cm line. ( 1 Å = 10" m ) Answ: 0.01μ αtom 5. A certain liquid has a density of 0.789 g / cm³. What volume in cubic mm should be poured into a graduated cylinder to give a mass of 19.8 g? Answ: 2.51 x 10 mm² 6. A fish tank has dimensions of 20 inch x 20 inch x 10 inch. What's the maximum volume of water, in millilitres, it can hold? Answ: 6.555 x10ʻ m L 7. Calculate these numbers and express your answer in the correct decimal or significant numbers. 0.0065 x 3.21 + 0.0911 Answ: No hint,.. duh O 8. A space object orbits the earth at 1.25 Mega miles per year. What's this speed in yards per milliseconds. Answ: 6.98 x 10° yards/milli- sec (NB: 5 % yards = 1 rod ; 40 rods = 1 furlong ; 8 furlongs = 1 mile) 9. Precious metals and gems are measured in troy weights in the English system: NB: 24 grains = 1 pennyweight (exact) Answ: 1.9339 x10² dm², 1.9339 x10² nm² 20 реппунеight -I roy ounce (eхact) 12 troy ounces = 1 troy pound (exact) 1 grain = 0.0648 gram Icarat = 0.200 gram If the density of gold is 19.3 g/cm², what's the volume of a troy pound of gold? Express the answer in: (a) Cubic decimetre (dm³) (b) Cubic nanometre directly from the answer in (a) 10. Apothecaries (druggists) use the following set of unit measurements in the English system: Is an Apothecary grain the same as a troy grain? Refer to Q9 and the following: ( 20 grains apothecaries = 1 scruple; 3 scruples = Idram apothecary, 8 dram apothecaries = 1 oz ароthecary : ldram aарothecary * 3.858g ). Answ: No hint, duh!!. O
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