Quiz 2.2 Basic Math for Physics

In the expression $\frac{A}{B\cdot C}$ , A has 5 significant figures, B has 2 significant figures, and C has 3 significant figures. How many significant figures does the quotient have?

• 2

• 3

• 4

• 1

The number of significant figures in 0.040 g is ___.

• one

• two

• three

• four

The number of significant figures in 10001 COVID-19 cases is ___.

• unlimited

• two

• five

• three

In a parallel universe, the quantity π has the value 3.14049... . Express π in that universe to five significant figures.

(a)  

The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures, the area of the rectangle should be written as ___.

• 0.68 m²

• 0.682 m²

• 0.6818 m²

• 0.68175 m²

A dog has three puppies. Spot weighs 12 ounces. Rascal weighs 9.5 ounces. Socks weighs 10.2 ounces. What is the total weight of the litter expressed to the correct number of significant figures?

• 31.7 ounces

• 31 ounces

• 32 ounces

• 30 ounces

What is 0.006 70 m in correct scientific notation?

• 6.70 x 10^–3 m

• 6.7 x 10^–3 m

• 6.70 x 10³ m

• 6.700 00 x 10^–3 m

What is 350 000 mol in correct scientific notation?

• 3.5 x 10^–5 mol

• 3.5 x 10⁵ mol

• 3.500 00 x 10⁵ mol

• 3.50 x 10⁵ mol

What is 1.59 x 10⁷ g in standard notation?

• 0.000 000 159 g

• 1 590 000 000 g

• 15 900 000 g

• 0.000 001 59 g

What is 4.1 x 10^–5 ns in standard notation?

• 0.000 041 ns

• 0.000 004 1 ns

• 410 000 ns

• 4 100 000 ns