2.1 Physical Quantities, Units and Measurements Flashcards by Raphaella Ridley

Q

Force

A

kgms-2

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Q

Work done

A

kgm2s-2

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Q

Power (derived units)

A

Kgm2s-3

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Q

Voltage (derived units)

A

Kgm2s-3A-1

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Q

Resistance (derived units)

A

Kgm2s-3A-2

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Q

Pressure (derived units)

A

Kgm-1s-2

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Q

Resistivity

A

Kgm3s-3A-2

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Q

Tera standard form

A

12

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Q

Giga standard form

A

9

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Q

Mega standard form

A

6

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Q

Kilo standard form

A

3

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Q

Centi standard form

A

-2

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Q

Milli standard form

A

-3

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Q

Micro standard form

A

-6

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Q

Nano standard form

A

-9

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Q

Pico standard form

A

-12

Q

Define accuracy.

A

How close the mean value is to the true value.

Q

Define precision.

A

How close together the repeat values are.

Q

What is resolution?

A

The smallest change it can read.

Q

What is homogeneous?

A

Same for each quantity in equation

Q

Estimate of power used by one person in a day

A

1 kW

Q

Estimate power of toaster

A

1200W

Q

Estimate power of microwave

A

1500W

Q

Estimate power of air conditioner

A

5000 W

Q

Estimate power of oven

A

3000W