2.1 Physical Quantities, Units and Measurements

Question 1

Force

Answer 1

kgms-2

Question 2

Work done

Answer 2

kgm2s-2

Question 3

Power (derived units)

Answer 3

Kgm2s-3

Question 4

Voltage (derived units)

Answer 4

Kgm2s-3A-1

Question 5

Resistance (derived units)

Answer 5

Kgm2s-3A-2

Question 6

Pressure (derived units)

Answer 6

Kgm-1s-2

Question 7

Resistivity

Answer 7

Kgm3s-3A-2

Question 8

Tera standard form

Answer 8

12

Question 9

Giga standard form

Answer 9

9

Question 10

Mega standard form

Answer 10

6

Question 11

Kilo standard form

Answer 11

3

Question 12

Centi standard form

Answer 12

-2

Question 13

Milli standard form

Answer 13

-3

Question 14

Micro standard form

Answer 14

-6

Question 15

Nano standard form

Answer 15

-9

Question 16

Pico standard form

Answer 16

-12

Question 17

Define accuracy.

Answer 17

How close the mean value is to the true value.

Question 18

Define precision.

Answer 18

How close together the repeat values are.

Question 19

What is resolution?

Answer 19

The smallest change it can read.

Question 20

What is homogeneous?

Answer 20

Same for each quantity in equation

Question 21

Estimate of power used by one person in a day

Answer 21

1 kW

Question 22

Estimate power of toaster

Answer 22

1200W

Question 23

Estimate power of microwave

Answer 23

1500W

Question 24

Estimate power of air conditioner

Answer 24

5000 W

Question 25

Estimate power of oven

Answer 25

3000W