physical science

a force acting in the direction the object is moving is doing positive work

true

Mechanical energy is conserved the energy you end up always equals the gravitational potential energy you end up with

true

a force acting perpendicular to an objects displacement does negative work

false; it does no work

energy can be converted from one form to another

true

the harder you push on the wall the more work you do

false

doing the same amount of work in the same time requires less power output

true

according to the molecular theory of matter particles move faster and spread apart

true

convection currents occur in GASES and liquids

true

if an object has a large specific heat only a small amount of energy is required

false

solid to gas

sublimation

same temp at the freezing point of the substance

melting point

Hammer hit nail

the nail has more kinetic energy

a birthday balloon full of air what happens to the balloon

it will expand

cold milk into hot tea

the particles of cold increases and one will loose

an example of a heat insulator

wooden spoon

when molecules slow down in water

they will freeze

temperature and speed of molecules

directly related

the kinetic molecular theory explains

the behavior of GASES only

according the KM theory particles of gas

are always in motion

which of the following wave types require a medium

sound

frequency of a light wave determines

its speed

the pitch is determined by

its frequency

the amplitude of a sound wave determines

its volume

wavelength is the

difference between EM waves

another name for light wave is

electromagnetic wave

perpendicular particle motion

transverse

speed of sound wave is affected by

wavelength, medium, frequency

frequency is measured in

Hertz

when two mechanical waves interfere

the amplitude of a resulted wave the sum of both waves

two mechanical waves interfere one has a positive displacement and the other has a negative

destructive interference

what type of wave is a sound wave

longitudinal

sound waves travel faster through

SOLIDS, liquids, then gases

UV

is between visible light and xrays

particles vibrate in same direction

longitudinal

the number of waves produced in a given amount of time

frequency

energy of a wave is calculated using

amplitude

energy and power is measured in

watts

type of energy associated with the motion of an object

kinetic energy

potential energy in air

gravitational potential energy

stretchy or springy

elastic potential energy

a measure of how quickly work is done

power

what is the sum of KE and PE

mechanical

energy can be converted or transferred but the TE doesn’t change?

Conservation of Energy

pushing hard but can’t move a car

no work

working on an experiment

no work

shoveling snow

work

what is not involved in hitting a tennis ball

chemical

substance a has higher specific heat than

more specific heat

anytime a temp difference occurs you can expect it to go from

higher temp to lower temp

going through a phase change heat is

absorbed and temp stays the same

moving molecule to molecule

radiation

second law of thermodynamics

entropy of an isolated system can’t increase

what quantity has greatest influence on KE

velocity

comes to and leaves earth

nuclear

thermal energy is constant

conservation of energy

standing waves are utilized by

musical instruments

doppler effect refers to change in

wave frequency

converging lens

bulges out in middle and focuses a beam of light

reflection

when it hits the surface and bounces back

bending wave

refraction

as wavelength gets longer frequency

decreases