Physics

Question 1

the science of matter and energy and the interactions between them

Answer 1

physics

Question 2

acoustics, optics, mechanics, thermodynamics, electromagnetism, atomic physics

Answer 2

fields of physics

Question 3

length, volume, mass, density

Answer 3

properties of objects

Question 4

every physical measurement consists of two elements:

Answer 4

magnitude and unit of measurement

Question 5

the length of the shortest line connecting two points

Answer 5

distance (d)

Question 6

the amount of space occupied by a surface, m^2

Answer 6

area (a)

Question 7

the amount of space occupied by a substance or object, m^3

Answer 7

volume (v)

Question 8

the amount of matter present in a substance

Answer 8

mass (m)

Question 9

the force of gravity acting on an object

Answer 9

weight (w)

Question 10

= m x g

Answer 10

weight

Question 11

the amount of matter in a given unit of volume

Answer 11

density (p)

Question 12

=m/v

Answer 12

density (p)

Question 13

the property that allows matter to recover its size and shape after it has been expanded or compressed

Answer 13

elasticity

Question 14

is needed for sound to be created and for sound to travel

Answer 14

elasticity

Question 15

the branch of physics that describes the motion of objects in space without considering the cause of the motion

Answer 15

kinematics

Question 16

focuses on the relationship among displacement (d), velocity (v), acceleration (a), and time (t)

Answer 16

kinematics

Question 17

are described by a magnitude and a unit (distance, volume, density, temperature)

Answer 17

scalars

Question 18

are described by a magnitude, a unit, and a direction (displacement, velocity, acceleration. force)

Answer 18

vectors

Question 19

is represented by an arrow with a specific magnitude and direction

Answer 19

vector

Question 20

a change in position

Answer 20

displacement (d)

Question 21

it is the distance from the original position to the final position, not the path taken to get there

Answer 21

displacement (d)

Question 22

the rate of displacement, m/s

Answer 22

velocity (v)

Question 23

= displacement/ time, d/t

Answer 23

average velocity (Vavg)

Question 24

the rate of change in velocity, m/s^2

Answer 24

acceleration (a)

Question 25

=velocity/ time= delta y/delta x= v2-v1/t2-t1

Answer 25

average acceleration (aavg)

Question 26

the direction of acceleration is influenced by:

Answer 26

motion and speed of acceleration

Question 27

indicates either that the object is accelerating in the negative direction or decelerating in the positive direction

Answer 27

negative acceleration

Question 28

the study of the effects of forces on the state of an object or system of objects

Answer 28

dynamics

Question 29

is a push or pull, newton (N)

Answer 29

force (F)

Question 30

inertia: object at rest will remain at rest, object in motion will remain in motion

Answer 30

newtons first law

Question 31

an objects acceleration is proportional to the force exerted on the object and inversely proportional to the mass of the object, f = m x a

Answer 31

newtons second law

Question 32

for every action there is an equal and opposite reaction

Answer 32

newtons third law

Question 33

the effect of the force (F) moving an object over a distance (d), in joules (J)

Answer 33

work (W)

Question 34

= F x d

Answer 34

work (W)

Question 35

if displacement does not occur then:

Answer 35

no work is done

Question 36

the ability or capacity of an object to do work

Answer 36

energy (E)

Question 37

is stored in an object and gradually expended when object does work, in joules (J)

Answer 37

energy

Question 38

is future work

Answer 38

energy

Question 39

is used energy

Answer 39

work

Question 40

the energy of an object due to its position within a given physical system or environment

Answer 40

potential energy (Ep)

Question 41

the energy of motion that is carried by an object due to its velocity

Answer 41

kinetic energy (Ek)

Question 42

the main source of Ep but not its only one

Answer 42

gravity

Question 43

a source of Ep

Answer 43

elasticity

Question 44

states that energy can change from one form to another but cannot be created nor destroyed

Answer 44

law of conservation of energy

Question 45

Ek can be converted into Ep and vice versa or transmitted from one system to another

Answer 45

law of conservation of energy

Question 46

the rate at which a system is gaining or losing energy, watt (W)

Answer 46

power (P)

Question 47

= W/t = E/t

Answer 47

power (P)