Key Concepts

Question 1

What is the base unit of length in the International System of Units (SI)?

Answer 1

Meter (m)

Question 2

What is the base unit of mass in the International System of Units (SI)?

Answer 2

Kilogram (kg)

Question 3

What is the base unit of time in the International System of Units (SI)?

Answer 3

Second (s)

Question 4

What is the base unit of electric current in the International System of Units (SI)?

Answer 4

Ampere (A)

Question 5

What is the base unit of amount of substance in the International System of Units (SI)?

Answer 5

Mole (mol)

Question 6

What is the prefix for 1,000,000 in the International System of Units (SI)?

Answer 6

Mega (M)

Question 7

What is the prefix for 1,000 in the International System of Units (SI)?

Answer 7

Kilo (k)

Question 8

What is the prefix for 0.001 in the International System of Units (SI)?

Answer 8

Milli (m)

Question 9

What is the prefix for 0.000 001 in the International System of Units (SI)?

Answer 9

Micro (μ)

Question 10

What is the prefix for 0.000 000 001 in the International System of Units (SI)?

Answer 10

Nano (n)

Question 11

What is the prefix for 1,000,000,000 in the International System of Units (SI)?

Answer 11

Giga (G)

Question 12

What is the prefix for 0.01 in the International System of Units (SI)?

Answer 12

Centi (c)

Question 13

What is the symbol for the prefix kilo?

Answer 13

k

Question 14

What is the symbol for the prefix milli?

Answer 14

m

Question 15

What is the symbol for the prefix micro?

Answer 15

μ

Question 16

What is the symbol for the prefix mega?

Answer 16

M

Question 17

What is the symbol for the prefix nano?

Answer 17

n

Question 18

What is the symbol for the prefix giga?

Answer 18

G

Question 19

What is the symbol for the prefix centi?

Answer 19

c

Question 20

What is the definition of a vector quantity?

Answer 20

A quantity that has both magnitude and direction.

Question 21

Is velocity a vector or scalar quantity?

Answer 21

Vector quantity.

Question 22

What is the definition of a scalar quantity?

Answer 22

A quantity that has only magnitude.

Question 23

Is speed a vector or scalar quantity?

Answer 23

Scalar quantity.

Question 24

What is an example of a vector quantity?

Answer 24

Force.

Question 25

What is an example of a scalar quantity?

Answer 25

Temperature.

Question 26

Can vectors be added together?

Answer 26

Yes.

Question 27

Can scalars be added together?

Answer 27

Yes.

Question 28

What is the result of adding two vectors with the same direction?

Answer 28

The magnitude of the resulting vector is the sum of the magnitudes of the two vectors.

Question 29

What is the result of adding two vectors with opposite directions?

Answer 29

The magnitude of the resulting vector is the difference between the magnitudes of the two vectors.

Question 30

Can vectors be multiplied by scalars?

Answer 30

Yes.

Question 31

Can scalars be multiplied by vectors?

Answer 31

No.

Question 32

What is the scalar product of two vectors also known as?

Answer 32

Dot product.

Question 33

What is the vector product of two vectors also known as?

Answer 33

Cross product.

Question 34

Is distance a vector or scalar quantity?

Answer 34

Scalar quantity.

Question 35

What is a resultant vector?

Answer 35

The vector that represents the sum of two or more vectors.

Question 36

True or False: Resultant vectors can be found by adding vectors tip-to-tail.

Answer 36

True

Question 37

When are two vectors collinear?

Answer 37

When they lie on the same line or parallel to each other.

Question 38

What is the magnitude of the resultant vector if two vectors are perpendicular to each other?

Answer 38

The magnitude is equal to the square root of the sum of the squares of the magnitudes of the individual vectors.

Question 39

What is the angle between two vectors if their dot product is zero?

Answer 39

90 degrees