Physics Unit 1 Quiz 3

The bar above a number or expression is called a(n) ___.

• vinculum

• significant figure

• accurate number

• precise number

When you refer to how close a measurement is to its true value, you are referring to its ___.

• vinculum

• significant figures

• accuracy

• precision

The word ___ refers to how close the items in a set of measurements are to each other.

• vinculum

• significant figures

• accuracy

• precision

All of the known digits of a measurement, plus one estimated last digit are the measurement's ___.

• vinculum

• significant figures

• accuracy

• precision

Which of the following are 2 rules for determining significant figures?

• All nonzero digits are significant.

• Zeros between nonzero digits are significant.

• 
  

  If the digit to the right of the last significant figure is 4 or less, change the last significant figu

• All nonzero digits are non significant.

• none of these

Which of the following are 2 rules for determining significant figures?

• Zeros to the left of the first nonzero digit are not significant.

• Final zeros to the right of the decimal point are significant.

• If the digit to the right of the last significant figure is 4 or less, change the last significant figure.

• All zeros are not significant.

• none of these

Which of the following are 2 rules for determining significant figures?

• Final zeros in numbers without a decimal point are not significant unless their significance is indicated by a vinculum (bar) over the last significant figure.

• 
  

  Constants, coefficients in physics and chemical equations, temperatures, numbers obtained by counting objects, and numbers that are not measurements are not considered when determining the number of significant figures.

• If the digit to the right of the last significant figure is 4 or less, change the last significant figure.

• All nonzero digits are  non significant.

• none of these

Solve the problem. Select the choice that indicates the correct answer and the correct number of significant figures for each measurement. You may use a calculator.

204⋅6

• 1000

• 100

• 10

• 1

Solve the problem. Select the choice that indicates the correct answer and the correct number of significant figures for each measurement. You may use a calculator.

7.12 / 3

• 2

• 20

• 2.3777

• 2.3

Solve the problem. Select the choice that indicates the correct answer and the correct number of significant figures for each measurement. You may use a calculator.

443⋅12.50

• 5540

• 5537.5

• 5538

• 55