2nd Semester Test

Question 1

The amount of distance over time and does NOT show direction

Answer 1

Speed

Question 2

measures the path taken

Answer 2

distance

Question 3

an objects change in position relative to a reference point

Answer 3

motion

Question 4

the change in position of an object

Answer 4

displacement

Question 5

is the curved path an object follows when thrown, launched, or otherwise projected near the surface of Earth. Applies to objects that are moving in two dimensions under the influence of gravity. as two components—horizontal and vertical. The two components are independent.

Answer 5

projectile motion

Question 6

a combination of all forces acting upon an object

Answer 6

net force

Question 7

the energy that is transferred as electromagnetic waves, such as visible light and infrared waves

Answer 7

radiation

Question 8

is the movement of matter due to differences in density that are caused by temperature variations.

Answer 8

convection

Question 9

transfer of energy as heat through a material

Answer 9

conduction

Question 10

poor conductors

Answer 10

insulator

Question 11

any material through which energy can be easily transferred as heat

Answer 11

conductor

Question 12

an object at rest remains at rest and an object in motion maintains its velocity unless it experiences an unbalanced force

Answer 12

Newtons first law

Question 13

keyboard, mouse, mic

Answer 13

computer input devices

Question 14

The gravitational force an object experiences because of its mass, weight = mass x free-fall acceleration w=mg

Answer 14

weight equation

Question 15

increases as mass increases and decreases as distance decreases

Answer 15

what increases gravity

Question 16

rubber, wood

Answer 16

insulators

Question 17

phone, computer, satellite

Answer 17

telecommunication devices

Question 18

the time it takes a complete cycle or wave oscillation to occur

Answer 18

period

Question 19

a machine made up of one or more simple machines

Answer 19

compound machine

Question 20

the bending of a wavefront as the wavefront passes between two substances in which the speed of the wave differs

Answer 20

refraction

Question 21

the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through

Answer 21

reflection

Question 22

any interference in which waves combine so that the resulting wave is bigger than the original waves.

Answer 22

constructive interference

Question 23

sometimes known as the method of adding waves

Answer 23

principle of superstition

Question 24

When two waves of slightly different frequencies interfere with each other, they produce

Answer 24

beats

Question 25

is when one force is greater than the other causing it to go in that particular direction

Answer 25

unbalanced forces

Question 26

a quantity that measures the rate at which work is done or energy is transformed

Answer 26

power

Question 27

measures the distance between two equivalent parts of a wave

Answer 27

wavelength

Question 28

a set of instructions or commands that tell the computer what to do

Answer 28

software

Question 29

the rate at which velocity changes over time

Answer 29

acceleration

Question 30

waves that require a medium

Answer 30

mechanical waves

Question 31

a wave in which the particles of the medium move perpendicular to the direction the wave is traveling

Answer 31

transverse

Question 32

a wave in which the particles of the medium move parallel to the direction the wave is traveling

Answer 32

longitudinal wave

Question 33

consists of oscillating electric and magnetic fields, which radiate outward at the speed of light.

Answer 33

electromagnetic wave

Question 34

occur at the boundary of two mediums such as water and air

Answer 34

surface wave

Question 35

what are the two families of simple machines

Answer 35

lever family and inclined plane family

Question 36

energy cannot be created nor destroyed

Answer 36

law of conservation of energy

Question 37

9.8 m/s2 if you disregard all air resistance and friction

Answer 37

free- fall acceleration near earths surface

Question 38

modified inclined plane

Answer 38

wedge

Question 39

equals distance over time or -- v=d/t

Answer 39

equation for average speed

Question 40

a constant acceleration in a circle and a constant speed

Answer 40

uniform circular motion

Question 41

resists the initiation of sliding motion between two surfaces that are in contact and at rest

Answer 41

static friction

Question 42

the transfer of energy to a body by the application of a force that causes the body to move in the direction of the force

Answer 42

Work

Question 43

energy at rest or stored energy

Answer 43

potential energy

Question 44

change from mechanical energy due to friction or air resistance

Answer 44

nonmechanical energy

Question 45

The energy of a moving object due to the object’s motion is called

Answer 45

kinetic energy

Question 46

sum of potential and kinetic energy in a system

Answer 46

nonmechanical energy

Question 47

the measure of how hot or cold something is

Answer 47

temperature

Question 48

is defined as the quantity of heat required to raise a unit mass of homogenous material 1 K or 1°C in a specified way given constant pressure and volume.

Answer 48

specific heat

Question 49

energy transfer is accomplished by radiation and convection

Answer 49

passive solar heating system

Question 50

because it uses energy from another source, such as electricity, to move the heated water.

Answer 50

active solar heating system

Question 51

heat transfer

Answer 51

heat always goes from an object with a higher temp to a lower one

Question 52

usually, travel through a solid medium

Answer 52

sound waves

Question 53

waves are caused by what

Answer 53

a vibrating object

Question 54

the highest point in a transverse wave

Answer 54

crest

Question 55

the lowest point in a transverse wave

Answer 55

trough

Question 56

number of cycles or vibrations per unit of time

Answer 56

frequency

Question 57

is an observed change in the frequency of a wave when the source or observer is moving.

Answer 57

doppler effect

Question 58

a set of rules used to interpret data that conveys info

Answer 58

code

Question 59

anything used to guide, direct, or warn

Answer 59

signal

Question 60

a signal whose properties such as amplitude and frequency can change continuously in a given range

Answer 60

analog signal

Question 61

a signal that can be represented as a sequence of discreet values

Answer 61

digital signal

Question 62

the sending of visible and audible info by electronic means

Answer 62

telecommunication

Question 63

a part or piece of equipment that makes up a computer

Answer 63

hardware