Chapter 1

Question 1

What are fundamental quantities?

Answer 1

Quantities so basic that all other quantities are expressed in terms of them.

Question 2

What are quantities if they are not fundamental?

Answer 2

Derived quantities

Question 3

How many fundamental units are there?

Answer 3

7

Question 4

What is the fundamental unit for length?

Answer 4

Metre

Question 5

What is the unit for mass?

Answer 5

Kilogram

Question 6

What is the unit for time?

Answer 6

Second

Question 7

What is the unit for current?

Answer 7

Ampere

Question 8

What is the fundamental unit for temperatures?

Answer 8

Kelvin

Question 9

What are moles?

Answer 9

The amount of substance of a system that contains as many elementary entities as there are atoms in 0.012kg of carbon-12

Question 10

What is the unit of luminous intensity?

Answer 10

Candela

Question 11

What is a ‘pascal’ formed using fundamental units?

Answer 11

(m^-1)(kgs^-2)

Question 12

What is a Newton measuring?

Answer 12

Force

Question 13

What is a Newton in terms of fundamental units?

Answer 13

kgms^-2

Question 14

What is 3456 to three significant figures?

Answer 14

3460

Question 15

What is 3052 to three significant figures?

Answer 15

3050

Question 16

What is 0.482828 to two significant figures?

Answer 16

0.48

Question 17

What is the speed of light?

Answer 17

3.00 x 10^8 ms^-1

Question 18

When can you add or subtract numbers with exponents?

Answer 18

when the exponent is the same

Question 19

What is an order of magnitude?

Answer 19

A number rounded to the nearest power of 10

Question 20

What are physical quantities?

Answer 20

Things that are measurable.. Eg: mass, length, time