Question 1

Which of the following is the correct SI unit for force, and how is it derived from base units?

Accepted Answer

Newton (N), derived as $$\mathrm{kg} \cdot \mathrm{m} / \mathrm{s}^2$$

Question 2

A car travels 1500 meters. Express this distance in kilometers using metric prefixes.

Accepted Answer

$$1.5 km$$

Question 3

Which of the following equations demonstrates incompatible units in a physics equation?

Accepted Answer

$$\mathrm{Force} = \mathrm{Mass} + \mathrm{Acceleration}$$, with mass in kg and acceleration in $$m/s^2$$

Question 4

Convert $$0.00052$$ meters to scientific notation.

Accepted Answer

$$5.2 	imes 10$$^{-4}$$ m

Question 5

A radio wave has a wavelength of $$3,000,000,000 cm. $$What is this wavelength in decameters (dam)?

Accepted Answer

$$3 	imes 10^5$ dam

Question 6

Which of the following best describes why all units in a physics equation must be compatible?

Accepted Answer

To ensure the physical meaning of the equation is valid

Question 7

Express $$2,980,000,000 m/s in $$scientific notation.

Accepted Answer

$$2.98 	imes 10^8$ m/s

Question 8

Rewrite $$3.41 	imes 10$$^{-3}$$ in standard form.

Accepted Answer

$$0.00341$$

Question 9

Which of the following is the correct metric prefix for $$10^{-6}$$?

Accepted Answer

micro-

Question 10

A scientist measures a mass as $$0.0016 kg. $$Express this value in scientific notation.

Accepted Answer

$$1.6 	imes 10$$^{-3}$$ kg

Question 11

Which of the following is the correct SI base unit for time?

Accepted Answer

Second

Question 12

If you convert $$7.62 kg to $$milligrams, what is the result?

Accepted Answer

$$7.62 	imes 10^6$ mg

Question 13

Which of the following is the correct way to write $$0.000000098 in $$scientific notation?

Accepted Answer

$$9.8 	imes 10$$^{-8}$$

Question 14

A measurement is recorded as $$4.7 	imes 10^3$ m. What is this value in standard form?

Accepted Answer

$$4,700$$

Question 15

Which of the following best describes the purpose of using scientific notation in physics?

Accepted Answer

To express very large or very small numbers in a shorter form

Question 16

If you shift from a smaller to a bigger unit using metric prefixes, what happens to the numerical value of the measurement?

Accepted Answer

It becomes smaller

Question 17

Which of the following is the correct SI base unit for length?

Accepted Answer

Meter

Question 18

A student writes $$1.2 	imes 10^4$ g in standard form. What is the correct answer?

Accepted Answer

$$12,000 g$$

Question 19

Which of the following is the correct metric prefix for $$10^9$$?

Accepted Answer

Giga-

Question 20

A measurement is given as $$5.67 	imes 10$$^{-2}$$ m. Which of the following is the correct standard form?

Accepted Answer

$$0.0567 m$$

Introduction to Units, SI System, Metric Prefixes, and Scientific Notation

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