Physics Test 2

Question 1

Physical theoretical principles are usually expressed or defined by mathematical what ?

Answer 1

Formulas

Question 2

France took the standardization initiative in 1799 by establishing a decimal…

Answer 2

Metric system

Question 3

refers to the number of spatial coordinates required to describe an object.

Answer 3

First meaning of dimension

Question 4

refers to a kind of measurable physical quantity.

Answer 4

Second meaning of dimension

Question 5

The universe consists of three principal dimensions:

Answer 5

Space,time,and matter

Question 6

The metric unit of length

Answer 6

The meter

Question 7

The SI unit of time

Answer 7

The second

Question 8

is a measure of its tendency to resist a change in motion.

Answer 8

Mass

Question 9

SI unit for mass

Answer 9

Kilogram

Question 10

obtained from combinations of SI base units or other approved or derived units.

Answer 10

SI derived units

Question 11

Tool we can use to measure, critical in modern science research,man made

Answer 11

Instrument

Question 12

How close it is to the actual value

Answer 12

Accuracy

Question 13

An exact measurement

Answer 13

Precision

Question 14

The simple difference of the observe and accepted values, positive or negative

Answer 14

Error

Question 15

gives the measurement error as a percentage of the accepted value.

Answer 15

Percent error

Question 16

Steps for problem solving

Answer 16

Read the Exercise to Understand the Problem-Determine the Method of Solution-Substitute and Solve-Check Your Answer for Reasonableness