Question

7. What are the fundamental units in S.I. system ? Name
them along with their symbols.

9. Define standard metre.
10. Name two units of length which are bigger than a
metre. How are they related to the metre?
11. Write the names of two units of length smaller than a
metre. Express their relationship with metre.​

Answer 1

Answer:

7.

• The meter (symbol: m), used to measure length.
• The kilogram (symbol: kg), used to measure mass.
• The second (symbol: s), used to measure time.
• The ampere (symbol: A), used to measure electric current.
• The kelvin (symbol: K), used to measure temperature.

9.

Standard meter is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.

10.

Units bigger are hectometre and kilometre

Relation :

1 m = 1/100 HM

1 m = 1/1000 KM

11.

Units smaller than metre are centimetre and millimetres

Relation :

1 m = 100 cm

1m = 1000 mm

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Answer 2

Answer:

9.standard metre means the length of the path travelled by light in vaccum during a time interval