phys

🙏🙏🙏🙏

terminal velocity

• object has weight

• accelerates

• drag - which increases when speed increases

• drag = weight

• resultant force = 0

• constant speed

brownian motion

• smoke particles move with random motion

• collide with smaller particles

higher refractive index…

the angle of refraction will be smaller than the angle of incidence and the light will be refracted towards the normal of the surface

investigating magnetic field

1. sprinkle iron fillings

2. place bar magnet underneath paper

3. iron filings align with magnetic field

simple electromagnet

connect wire to circuit and cause the current to flow

motor effect!

1. wire carrying current experiences a temporary magnetic field

2. temporary magnetic field interacts with permanent magnetic field of bar magnets

3. creates a force, causing wire to turn

loudspeaker motor effect

1. wire carrying current experiences a temporary magnetic field

2. temporary magnetic field interacts with permanent magnetic field of bar magnets

3. creates a force, moving the speaker cone

4. speaker cone vibrates air particles, which creates sound that reaches your ears

convection

• warm air expands, less dense, rises

• cool air denser, sinks

• convection is repeated

nuclear fission’s chain reaction

• single neutron fired at Uranium nucleus

• splits into 2 daughter nuclei

• releases up to 3 neutrons, collide with other Uranium nuclei

• kinetic energy release

small star cycle

• nebula

• main sequence - forces are balanced and hyrogen nuclei join (nuclear fusion) - thermal and light energy released

• hydrogen fuel runs out

• star expands to become red giant

• shrinks: white drawf

• cools: black drawf

large star

• nebula

• burn hydrogen fuel

• runs out - red supergiant

• supernova

• neutron star OR black hole