Q: Which conversion factor would you use to convert minutes to seconds?

$$\frac{60 \text{ s}}{1 \text{ min}}$$

Question 1

Which of the following numbers is considered an exact number in scientific calculations?

Accepted Answer

The number of students in a classroom

Question 2

How many significant figures are in the number 0.0006307?

Accepted Answer

4

Question 3

A measurement is recorded as 100.0 g. How many significant figures does this value have?

Accepted Answer

4

Question 4

Which rule should be applied when adding 146.380 and 32.1?

Accepted Answer

Round to the least precise decimal place

Question 5

Calculate $$146.380 	imes 32.1$$ and express the answer with the correct number of significant figures.

Accepted Answer

$$4.70 	imes 10^3$

Question 6

Which SI prefix corresponds to $$10^{-9}$$?

Accepted Answer

nano

Question 7

A patient’s blood glucose level is measured as 85 mg/dL. Convert this value to $$	ext{g/L}.$$

Accepted Answer

$$0.85 g/L$$

Question 8

Which of the following is NOT a base unit in the International System of Units (SI)?

Accepted Answer

Liter

Question 9

A solid-state drive (SSD) has a capacity of 2 TB. How many bytes is this?

Accepted Answer

$$2 	imes 10$$^{12}$$ bytes

Question 10

Which conversion factor would you use to convert minutes to seconds?

Accepted Answer

$$\frac{60 	ext{ s}}{1 	ext{ min}}$$

Question 11

A molecular bond length is $$150 pm. $$Express this length in meters.

Accepted Answer

$$1.5 	imes 10$$^{-10}$$ m

Question 12

Which of the following statements about significant figures is TRUE?

Accepted Answer

When dividing, the result should have as many significant figures as the number with the fewest significant figures.

Question 13

A sample is measured as $$0.00890 kg. $$How many significant figures does this measurement have?

Accepted Answer

4

Question 14

Which of the following is a correct scientific notation for the number $$567.890$$ with all significant figures shown?

Accepted Answer

$$5.67890 	imes 10^2$

Question 15

A hospital prescribes a medication at a dosage of $$2.0 ng/mL. $$Convert this dosage to $$	ext{pg/L}.$$

Accepted Answer

$$2.0 	imes 10^3$ pg/L

Question 16

Which of the following is the correct way to round the result of $$864 + 17.259 to $$the proper number of significant figures?

Accepted Answer

$$881$$

Question 17

A circular silicon wafer of thickness $$0.5 cm is $$sliced from a cylindrical crystal of length $$25 cm. If $$each wafer is $$0.5 cm $$thick, what is the maximum number of wafers that can be obtained?

Accepted Answer

$$50$$

Question 18

Which of the following is a correct statement about reference values in science?

Accepted Answer

Reference values are considered exact and have infinite significant figures.

Question 19

Which metric prefix is commonly used in medicine to avoid fatal mistakes and is written as 'mc'?

Accepted Answer

micro

Question 20

A scientist needs to convert $$75 mg/dL to$$ $$	ext{pg/cm}^3. $$Which of the following is the correct first step in the logical sequence of unit conversions?

Accepted Answer

Convert dL to L

Chapter 1- Numbers, Significant Figures, and Units in Physics

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