For example, you would use a meter for measuring a room, but if you want to know

Question

For example, you would use a meter for measuring a room, but if you want to know how far it is from New York to Chicago you can use the prefix, kilo – 3 factors of 10 – and you would come up with a more familiar number.

Prefix

Symbol

Decimal

yotta

Y

1,000,000,000,000,000,000,000,000

zetta

Z

1,000,000,000,000,000,000,000

exa

E

1,000,000,000,000,000,000

peta

P

1,000,000,000,000,000

tera

T

1,000,000,000,000

giga

G

1,000,000,000

mega

M

1,000,000

kilo

k

1,000

hecto

h

100

deca

da

10

X

X

1

deci

d

0.1

centi

c

0.01

mili

m

0.001

micro

µ

0.000001

nano

n

0.000000001

pico

p

0.0000000001

femto

f

0.000000000000001

atto

a

0.000000000000000001

zepto

z

0.000000000000000000001

yocto

y

0.000000000000000000000001

Write which base unit and prefix if any you would use to make the following measurements. Use standard SI units and prefixes only

1)

MEASUREMENT NEEDED:

The diameter of a tree:

UNITS TO USE?

2)

Width of a hallway:

3)

Time to cross a lake by row boat:

4)

Mass of an elephant:

  

5)

Average life span of an insect:

6)

Diameter of an electron:

7)

Distance to Pluto from the Sun:

  

8)

Age of the pyramids:

9)

Thickness of a human hair:

  

10) Travel time from San Francisco to New York:

Prefix

Symbol

Decimal

yotta

Y

1,000,000,000,000,000,000,000,000

zetta

Z

1,000,000,000,000,000,000,000

exa

E

1,000,000,000,000,000,000

peta

P

1,000,000,000,000,000

tera

T

1,000,000,000,000

giga

G

1,000,000,000

mega

M

1,000,000

kilo

k

1,000

hecto

h

100

deca

da

10

X

X

1

deci

d

0.1

centi

c

0.01

mili

m

0.001

micro

µ

0.000001

nano

n

0.000000001

pico

p

0.0000000001

femto

f

0.000000000000001

atto

a

0.000000000000000001

zepto

z

0.000000000000000000001

yocto

y

0.000000000000000000000001

Explanation / Answer

Answer- the measurement and their unit are given below

S.No Measurement Needed Unit 1 The diameter of Tree X or meter 2 width of hallway hectometer (hm) 3 time of Cross lake by raw boat kilosecond or hours 4 Mass of Elephant 5000-6000kg or megagram(mg) 5 Average life span of insects 20-30 week or 440 days or megasecond (ms) 6 diameter of an electron diameter is about 10-18m or attometer(am) 7 distance from Pluto to sun distance is 7.5 billion km or 7500000000000m so it would be Terameter (Tm) 8 age of pyramids it would near around 4000 year so Terasecond (Ts) or years 9 thickness of human hair micrometer (µ) 10 travel time to San Francisco to New york kiloseconds(ks) or hours (by flght) or

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