Question 1

Which of the following is NOT a base quantity in the SI system?

Accepted Answer

Area

Question 2

A car travels at a speed of $$38.0\ \mathrm{m/s}. Is $$the driver exceeding the speed limit of $$75.0\ \mathrm{mi/h}$$? (Use $$1\ \mathrm{mi} = 1609\ \mathrm{m})$$

Accepted Answer

Yes, the driver is exceeding the speed limit.

Question 3

Which of the following best describes a physical property?

Accepted Answer

A property that is measurable and describes the state of a physical system.

Question 4

What is the dimension of acceleration in terms of length ($$L) $$and time ($$T$$)?

Accepted Answer

$$L/T^2$$

Question 5

If you multiply $$25.57\ \mathrm{m} by$$ $$2.45\ \mathrm{m}$$, how many significant figures should the result have?

Accepted Answer

3 significant figures

Question 6

Which of the following is the correct SI base unit for luminous intensity?

Accepted Answer

cd

Question 7

A measurement is reported as $$1.234 	imes 10$$^{-4}$$. How many significant figures does this value have?

Accepted Answer

4 significant figures

Question 8

Which conversion factor would you use to convert $$100\ \mathrm{mi} to $$kilometers?

Accepted Answer

$$1\ \mathrm{mi} = 1.609\ \mathrm{km}$$

Question 9

Which statement about dimensional analysis is correct?

Accepted Answer

It is used to check if the units on both sides of an equation are the same.

Question 10

When adding $$135\ \mathrm{m}$$ and $$3.25\ \mathrm{m}$$, what should be the decimal place of the result?

Accepted Answer

Units place

Question 11

Which of the following is an example of an order-of-magnitude estimate?

Accepted Answer

$$0.0086\ \mathrm{m} \sim 10$$^{-2}$$\ \mathrm{m}$$

Question 12

Which of the following quantities is NOT considered a physical property?

Accepted Answer

Color

Question 13

The dimension of speed is:

Accepted Answer

$$L/T$$

Question 14

Which of the following statements about significant figures is TRUE?

Accepted Answer

Zeros at the end of a number and to the right of a decimal point are always significant.

Question 15

A measurement of $$1000$$ has how many significant figures?

Accepted Answer

1 significant figure

Question 16

Which of the following is the correct dimensional form for the equation $$x = \frac{1}{2} a t^2$?

Accepted Answer

$$L = L/T^2$ 	imes T^2$ = L$$

Question 17

Which of the following is NOT a criterion for categorizing the measurement of a property?

Accepted Answer

Shape

Question 18

If a measurement is reported as $$0.000123$$, how many significant figures does it have?

Accepted Answer

3 significant figures

Question 19

Which of the following is the correct conversion factor to change $$1\ \mathrm{ft} to $$centimeters?

Accepted Answer

$$1\ \mathrm{ft} = 30.48\ \mathrm{cm}$$

Question 20

Which of the following statements about measurement is correct?

Accepted Answer

Measurement is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events.

Physics and Measurement: SI Units, Dimensional Analysis, and Significant Figures

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드