Question

. Table 1.3. m. ons O mm. metres ons Literacy 1. A human hair is 50 um in diameter. Write answers in centimetre, decimeter and meters. 2. List a suitable unit (with prefix as needed) for measuring the following: a. the time it takes to play a music in your device b. your height c. the length of a football field d. the length and width of a bread e. the thickness of a paper f. a term at your school g. the distance from your home to your school h. your mass i. the length of your physics lab room J. the mass of a sports car 3. Convert each of the following: a. 2 dm to millimetres b. 2 h 10 min to seconds c. 16 g to micrograms d. 0.75 km to centimetres 3 e. 0.675 mg to grams 4. 4. Rewrite the following quantities using a suitable prefix: a) 0.003 s b) 89 000 mm c) 6.02×10⁰ m d) 18 000 km e) 0.00005 m

Answer 1

Ответ:

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Answer 2

1. Measurements in different units:

a. Human hair diameter in micrometers (um): 50 um - In centimeters (cm): 0.005 cm (since 1 cm = 1000 um) - In decimeters (dm): 0.0005 dm (since 1 dm = 10 cm) - In meters (m): 0.00005 m (since 1 m = 10 dm)

2. Suitable units for measuring the following:

a. The time it takes to play music in your device: - Seconds (s)

b. Your height: - Meters (m)

c. The length of a football field: - Meters (m)

d. The length and width of a bread: - Centimeters (cm)

e. The thickness of a paper: - Millimeters (mm)

f. A term at your school: - Months (mo) or semesters

g. The distance from your home to your school: - Kilometers (km) or meters (m)

h. Your mass: - Kilograms (kg)

i. The length of your physics lab room: - Meters (m)

j. The mass of a sports car: - Kilograms (kg) or metric tons (t)

3. Conversions:

a. 2 decimeters (dm) to millimeters (mm): - 2 dm = 200 mm (since 1 dm = 100 mm)

b. 2 hours and 10 minutes to seconds: - 2 hours = 2 * 3600 seconds (1 hour = 3600 seconds) - 10 minutes = 10 * 60 seconds (1 minute = 60 seconds) - Total time = 2 * 3600 + 10 * 60 seconds = 7200 + 600 seconds = 7800 seconds

c. 16 grams (g) to micrograms (µg): - 16 g = 16,000,000 µg (since 1 g = 1,000,000 µg)

d. 0.75 kilometers (km) to centimeters (cm): - 0.75 km = 75,000 cm (since 1 km = 100,000 cm)

e. 0.675 milligrams (mg) to grams (g): - 0.675 mg = 0.000675 g (since 1 mg = 0.001 g)

4. Rewrite the quantities using suitable prefixes:

a) 0.003 s (seconds) can be rewritten as 3 ms (milliseconds) since 1 s = 1000 ms.

b) 89,000 mm can be rewritten as 8.9 m since 1 m = 1000 mm.

c) 6.02×10⁰ m is already in meters (m), so no change is needed.

d) 18,000 km can be rewritten as 18 Mm (megameters) since 1 km = 0.001 Mm.

e) 0.00005 m can be rewritten as 50 µm (micrometers) since 1 m = 1,000,000 µm.