Foundations of Physics

Question 1

SI Unit of Mass

Answer 1

Kilogram

Question 2

SI Unit of Amount

Answer 2

Mol

Question 3

SI Unit of Current

Answer 3

Amperes

Question 4

SI Unit of Temperature

Answer 4

Kelvin

Question 5

SI Unit of Length

Answer 5

Metre

Question 6

SI Unit of Time

Answer 6

Seconds

Question 7

What Does the Prefix “p” Indicate

Answer 7

Pico, 10⁻¹²

Question 8

What Does the Prefix “n” Indicate

Answer 8

Nano, 10⁻⁹

Question 9

What Does the Prefix “µ” Indicate

Answer 9

Micro, 10⁻⁶

Question 10

What Does the Prefix “m” Indicate

Answer 10

Milli, 10⁻³

Question 11

What Does the Prefix “K” Indicate

Answer 11

Kilo, 10³

Question 12

What does the Prefix “M” Indicate

Answer 12

Mega, 10⁶

Question 13

What Does the Prefix “G” Indicate

Answer 13

Giga, 10⁹

Question 14

What Does the Prefix “T” Indicate

Answer 14

Tera, 10¹²

Question 15

What is Random Error?

Answer 15

An error that occurs due to unexpected changes in an experiment, cannot be repeated, cause repeated results to differ

Question 16

What is Systematic Error?

Answer 16

An error that occurs due to faults in equipment or the experimental method, cause the results to differ by the same amount each time, predictable

Question 17

How do you Reduce Random Error?

Answer 17

Take at least 3 repeats (and identify anomalies), use data loggers/ computers, use higher resolution equipment

Question 18

How do you Reduce Systematic Error?

Answer 18

Calibrate the equipment

Question 19

How do you Calculate Percentage Uncertainty from Absolute Uncertainty?

Answer 19

If absolute uncertainty is x+-n then n/x = percentage uncertainty

Question 20

When you Multiply/Divide What Should you do to the Uncertainties?

Answer 20

If multiply and divide you must add the percentage uncertainties (abs uncertainty can’t be used)

Question 21

When you Add/Subtract What should you do to the Uncertainties?

Answer 21

Add the absolute uncertainties (can’t use percentage uncertainties)