Ch 1 Physical Quantities and Units

Question 1

All physical quantities consist of __________ and ___________.

Answer 1

magnitude and unit

Question 2

What are the 5 base quantities?

Answer 2

mass, length, time, current, temperature

Question 3

What is the SI unit of mass?

Answer 3

kilogram (kg)

Question 4

What is the SI unit of length?

Answer 4

meter (m)

Question 5

What is the SI unit of time?

Answer 5

second (s)

Question 6

What is the SI unit of current?

Answer 6

ampere (A)

Question 7

What is the SI unit of temperature?

Answer 7

kelvin (K)

Question 8

What is the SI unit of speed?

Answer 8

meters per second (m/s)

Question 9

What is the SI unit of acceleration?

Answer 9

meters per square second (m/s2)

Question 10

What is the SI unit of density?

Answer 10

kilogram per cubic meter (kg/m3)

Question 11

What is a scalar quantity?

Answer 11

A quantity with only magnitude.

Question 12

What is a vector quantity?

Answer 12

A quantity with both magnitude and direction.

Question 13

Convert 0.001 m to mm.

Answer 13

1 mm

Question 14

Convert 300 g to kg.

Answer 14

0.3 kg

Question 15

Convert 0.00001 m to micrometer.

Answer 15

10 micrometer

Question 16

Convert 200 000 W to MW.

Answer 16

0.2 MW

Question 17

Convert 20 000 000 J to GJ.

Answer 17

0.02 GJ

Question 18

Give one example of a vector quantity.

Answer 18

Any of the following is correct:
velocity, acceleration, force, displacement, weight.

Question 19

Give one example of a scalar quantity.

Answer 19

Any of the following is correct:
speed, distance, time, mass, current, voltage, resistance etc.

Question 20

Read the micrometer screwgauge reading. (Include the units)

Answer 20

3.09 mm

Question 21

Read the vernier caliper reading. (Include units)

Answer 21

10.02 cm

Question 22

Read the micrometer screwgauge reading. (Include units)

Answer 22

6.84 mm

Question 23

Read the vernier caliper reading. (Include units)

Answer 23

3.36 cm