Physics test 2 grade 10

Question 1

What is the smallest unit for a ruler?

Answer 1

0.1 cm

Question 2

What is the smallest unit for a protractor?

Answer 2

1 Degree

Question 3

How is the length of a line expressed with uncertainty?

Answer 3

1.0 ± 0.1 cm

Question 4

What does the notation 1.0 ± 0.1 cm indicate?

Answer 4

The line could be 0.9 cm to 1.1 cm.

Question 5

What is the uncertainty in measurement based on?

Answer 5

The smallest unit on the instrument.

Question 6

What is the maximum interval calculation from 9:10 to 9:25?

Answer 6

16 minutes

Question 7

What is the minimum interval calculation from 9:10 to 9:25?

Answer 7

14 minutes

Question 8

What is the average time interval calculated from 9:10 to 9:25?

Answer 8

15 ± 1 minutes

Question 9

How do you express a measurement using a protractor?

Answer 9

Angle ± 1 °

Question 10

What do we call uncertainties that arise from various factors, including measurement limitations?

Answer 10

Random uncertainties

Question 11

What is the process to find the uncertainty of a set of readings?

Answer 11

Largest reading - smallest reading, divided by 2.

Question 12

how to detect significant figures in rounding?

Answer 12

Start from the left; first non-zero number is the first significant figure.

Question 13

What is the uncertainty of the readings 122, 123, 125, 119, 117?

Answer 13

4

Question 14

What is the value of the digit 3 in 100.03?

Answer 14

3 hundredths

Question 15

When calculating average, how should it be written in relation to uncertainty?

Answer 15

To the same place value as the uncertainty.

Question 16

What should be done if the random uncertainty is smaller than the instrument uncertainty?

Answer 16

Use the instrument uncertainty.

Question 17

What is the final result format when including uncertainty (in tables)

Answer 17

Average ± uncertainty

Question 18

Fill in the blank: The uncertainty in a measurement is always to _______.

Answer 18

one significant figure

Question 19

What is the average time calculated from readings 2.01, 2.22, 1.98, 2.05, and 2.01?

Answer 19

2.1 to 1 s.f.

Question 20

What does the uncertainty of ± 0.1 in length readings come from?

Answer 20

The smallest unit on the ruler.

Question 21

What does the uncertainty of ± 0.1 in time readings come from?

Answer 21

The smallest unit on the stopwatch.

Question 22

place values of
5432.109

Answer 22

5 - thousands
4 - hundred
3- tens
2 - ones/units
.
1 - tenths
0 - hundredths
9 - thousandths

Question 23

in scientific notation how to tell if it is two or one sig fig

Answer 23

5.0 x 10^9 - two sig figs
5 x 10^9 - one sig figs

Question 24

what dec place is uncertainty

Answer 24

1 significant figure

Question 25

how does uncertainty relate to average

Answer 25

average is to the same place value as uncertainty ex: if uncertainty = +- 0.1, then average = 63.215 -> 63.2

Question 26

two types of uncertainty

Answer 26

instrument (smallest unit) - horizontal random (max-min/2) - vertical

Question 27

5432.109 significant figures

Answer 27

5432.11 - 6 sig fig 5432.1 - 5 sig fig 5432 - 4 sig fig 5430 - 3 sig fig 5400 - 2 sig fig 5000 - 1 sig fig

Question 28

how to find uncertainty

Answer 28

random: min - max divided by 2 Instrument: smallest unit on device

Question 29

how to draw table

Answer 29

column 1 - independent variable column 2 - dependent variable under column 2 - individual trials column 3 - random uncertainty column 4 - average Include instrument uncertainties in titles