Physics----Electricity & Light and Optics

The easiest chapter...hehehehe
So,nothing to do with this chapters.

ELECTRICITY

Just one thing,simplify the circuit

LIGHTS & OPTICS

Hurm.....read carefully.is it given mirror is concave or convex.... or is it given lens is converging or diverging....then just substitute and use the right formula.....
don't be panic....










That's all for physics...need consultation.please don't find me.go to your lecture...hehehe(just joke)

Physics----Sound & Waves

Types of waves

Tranverse = one in which the disturbance occurs parellel to the line of the wave
Longitudinal(sound) = one in which the disturbance occurs perpendicular to the direction of traveling wave

Highlight the graph and see whether it is vs tme or distance.if it is vs time,one cycle represent period,T and if it is distance,it represent wavelength....

Sound Intensity

For this topic,highlight that which eq must be used.......
There are 2 types of finding the answer....
Read the question carefully,if it say about emits uniformly/sumthing to do about distance,then use 4nr2

The Doppler Effect

In this topic,there 4 things we must consider...
frequency for observer and the source,velocity for observer and the source,is it approaching or is it leaving......
Use the approprieate formula....

Physics----Temperature & Heat

Energy flow from high temp to lower temp.Lower tem will gain heat while high temp loss heat....
it continue until both have the same tmep.Same temp is called Thermah Equilibrium which mean no energy flow..........

COMMON SCALES

Fahrenheit degree F & Celcius degree C.

Change between temp(deta T) is specified as Celcius degree, C degree.

converting------
fahrenheit=32+ 9/5 celcius
celcius=5/9 (fahrenheit-32)
kelvin=celcius+273.15

THERMAL EXPANSION

Linear--:
deta L = a L(initial) C degree

overflow is calculated by determined what material that been overflew and minus with deta T of another substance.

Volume--:
deta V = B(beta) V(initial) C degree

C degree and Kelvin just the same.if the question gives temp in kelvin,just use it and don' need to convert to C degree.

SPECIFIC HEAT CAPACITY

Q=mC deta T

Q=heat, m=mass , deta T= temp change(final - initial)

LATENT HEAT

Fusion = solid to liquid
Vaporization = liquid to gase
Sublimation = solid to gase

Q=mL

Q=heat, m= mass, L=latent heat

Differentiation between Q=mC deta T & Q = mL

Q = mL occur when there is a change in the phase for example ice become water,otherwise use Q=mC deta T.Both can be used together,based on the question...