Q: A rectangular box has length $$l = 2 m$$, width $$w = 3 m$$, and height $$h = 4 m. $$What is its volume?

$$V = l \times w \times h = 24 m$^3$$

Q: Which of the following best illustrates the use of scientific notation in physics?

Expressing the speed of light as $$3 \times 10^8$ m/s

Question 1

Which of the following best describes a scientific theory?

Accepted Answer

A well-substantiated explanation of some aspect of the natural world that is based on a body of evidence.

Question 2

A student measures the length of a rod several times and gets values close to each other, but all are off by 2 cm from the actual length. Which term best describes the student's measurements?

Accepted Answer

Low accuracy, high precision

Question 3

Which of the following is NOT a fundamental SI unit?

Accepted Answer

Gram ($$\mathrm{g})$$

Question 4

A hypothesis is best defined as:

Accepted Answer

A tentative explanation that can be tested by experimentation.

Question 5

Which of the following statements best distinguishes science from technology?

Accepted Answer

Science seeks to understand the natural world, while technology applies scientific knowledge for practical purposes.

Question 6

A scientist records a measurement as $$3.2 	imes 10^4$ meters. Which SI prefix would best represent this value?

Accepted Answer

Kilo-

Question 7

Which of the following best describes the scientific method?

Accepted Answer

A flexible process involving observation, hypothesis, experimentation, and analysis.

Question 8

A triangle has sides of length $$a = 5 cm$$, $$b = 7 cm$$, and $$c = 10 cm. $$Which formula should be used to find the angle opposite side $$c$$?

Accepted Answer

Cosine rule: $$c^2$$ = $$a^2$$ + $$b^2 - 2ab$$ \cos C$$

Question 9

Which of the following is an example of a vector quantity?

Accepted Answer

Velocity

Question 10

A laboratory experiment yields results that are consistent each time it is repeated. This is an example of:

Accepted Answer

Reliability

Question 11

If a measurement is reported as $$0.00056$$ meters, what is its value in scientific notation?

Accepted Answer

$$5.6 	imes 10$$^{-4}$$

Question 12

Which of the following best describes a scientific law?

Accepted Answer

A statement based on repeated experimental observations that describes some aspect of the world.

Question 13

A right-angled triangle has sides $$a = 3 cm $$and $$b = 4 cm. $$What is the length of the hypotenuse $$c$$?

Accepted Answer

$$c = \sqrt{3^2$ + 4^2$} = 5 cm$$

Question 14

Which of the following is NOT a characteristic of the scientific attitude?

Accepted Answer

Bias

Question 15

A student solves the equation $$2x + 3 = 7. $$What is the value of $$x$$?

Accepted Answer

$$x = 2$$

Question 16

Which of the following is a scalar quantity?

Accepted Answer

Mass

Question 17

A rectangular box has length $$l = 2 m$$, width $$w = 3 m$$, and height $$h = 4 m. $$What is its volume?

Accepted Answer

$$V = l 	imes w 	imes h = 24 m$^3$$

Question 18

Which of the following best illustrates the use of scientific notation in physics?

Accepted Answer

Expressing the speed of light as $$3 	imes 10^8$ m/s

Question 19

A student needs to convert $$5$$ kilometers to meters. Which calculation is correct?

Accepted Answer

$$5 	imes 1000 = 5000 m$$

Question 20

Which of the following is an example of an error due to uncertainty in measurement?

Accepted Answer

A ruler with markings every 1 mm cannot measure to the nearest 0.1 mm.

Module 0: Science Foundations and Essential Mathematics for Physics with Calculus

Guida di studio - Domande di pratica

Study guide - Flashcard