Physics Unit 1

Question 1

What is the difference between accuracy and precision?

Answer 1

accuracy is how close something is to the true value

precision is the ability to recreate your measurements, how close several measurements of the same object are to eachother

Question 2

The least rule

Answer 2

Sig fig rule for multiplication and division, the answer has the same number of sig figs as the number being multiplied or divided with the least amount of sig figs

ex. 564.83*41, 41 has the least amt of sig figs (2), so round to 2 sig figs

answer=2.3 x 10^4

Question 3

the line rule

Answer 3

sig fig rule for adding and subtracting, the answer will have the same amount of decimal places as the number with the least amount of decimal places,

ex-
without with
234.001 234.00|1
- 3.45. ——> 3.45|
————- ——————
237.451 237.45

Question 4

SI unit for length

Answer 4

meters

Question 5

SI unit for time

Answer 5

seconds

Question 6

SI unit for mass

Answer 6

kilogram