Measurements 7 Flashcards by joel mammen isaac

Q

3 types of physical quantities

A

Fundamental or basic qty
Derived qty
Supplementary qty

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Q

1 metric tonne =

A

1000 kg

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Q

Quintal =

A

100 kg

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Q

1 day contain how many seconds or minutes

A

86400 seconds or 1440 minutes

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Q

Area of a sphere

A

4πr x r

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Q

SI system when discovered

A

1960

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Q

Volume of a sphere

A

4/3 x π x r x r x r

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Q

Temp SI unit

A

Kelvin

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Q

Force SI unit

A

Newton

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Q

SI unit of mass

A

Kg

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Q

Force formula

A

Mass x acceleration

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Q

Pressure SI unit

A

Pascal

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Q

Electric current SI unit

A

Ampere

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Q

Luminous intensity SI unit

A

Candela - cd

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Q

Early systems of measurement were based on only 3 fundamental quantities

A

Mass , time and length

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Q

Pressure formula

A

Force/ area

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Q

M =

Measure of a physical quantity

A

N x U- where N stands for number and U stands for unit

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Q

Tera

A

10 raised to 12

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Q

Exa

A

10 raised to 18

Q

PETA

A

10 raised to 15

Q

Giga

A

10 raised to 9

Q

1 micron =

A

10 raised to -6 metre

Q

Amt of substance SI unit

A

Mole - mol

Q

Density formula

A

Mass/ volume

Q

Vector can be divided by vector algebra

A

F

Q

Force formula

A

Mass x acceleration

Q

Velocity formula in 3 dimensions

A

L x T raised to -1

Q

Force formula in three dimensions

A

M x L x T raised to -2

Q

Pressure formula in three dimensions

A

M x L-1 x T-2

Q

Pressure is

A

Force per unit area

Q

Physics derived from the word

A

Fusis meaning nature and natural phenomena

Q

Perpendicular vectors also called

A

Orthogonal vectors

Q

Tan A =

A

Sin A / Cos A

Q

There is no actual ……………….. of vectors

A

Subtraction

Q

Pico

A

10 raised to -12

Q

Femto

A

10 raised to -15

Q

Atto

A

10 raised to -18

Q

1 parsec

A

3.26 light years

Q

Smallest practical unit of distance

A

Fermi

Q

Parsec full form

A

Parallactic second

Q

1 hectometre

A

100 metre

Q

1 hectare

A

Square of 1 hector (100 m)

Q

CGPM

A

General conference on weight and measures

Q

Smallest unit of time

A

Shake ( 10 raised to-8)

Q

Angstrom =

A

10 raised to -10 metres

Q

4 systems of measurements.

A

F.P.S
C.G.S
M.K.S
SI