physics chapter 1 section 1

how to make a car

1 thermodynamics: engine efficient and the use of collants

2 electromagnetism battery starter headklights

3optics headrear view mirror and head lights

4 vibnrations and mechanical waves sound insulation radio speakers shook absorbers

5 mechanics the wheels spining that gives enough friction for traction

for the hull for it to be maneavurabel and quick moving we need to study?

Fluid physics

determining the most eficent shape for the sails we need to know?

and to balance loads?(stability)

physics motion and its cuases we need to know mechanics for loads

Why is mechanics needed for balancing loads

Beacuse we need stability and stability its one of teh mechanics areas

areas within physics

mechanics motion and its cuases afalling opbjects spninning objects weight and friction

thermodynamics heat and tempreture melting freezing engine and refrigators

vibratioons an dwave phenomena the specific types of repetetive motion spring pendulum and sound

optics light mirrors lenes color

electro magnetism magnitic electricity and light electric charge circuitry electromagnetism and permanent magnets

relativity the movment of particles including very fast ones accelerator collisiosn nuclear energy

quantum mechanics c the behaviour of submicroscopic particles the atoms and itsd parts

How is physics distinct from other displines?

One diffrence its the ranges of branches of the areas of physics and the related scientific methods that explains natural pheniomenom

Scientific method explains what in physics?

It explains natural phenomenom

what are the research products that the nresearchers use?

scientific method

Scientiofic evolution can arises sometimes due to discoveries that happend?

By shear coincidence

How ever scientic progress as a whole was due to?

Carefully prepard research projects

And in those research products they followed the steps of?

Scientifc methods

scientific method

a systamatic method of studying a natural phenomena

They follow a logical aproach where they?

Do observations collect data make a hypothesis and test those hypothesis and make a theory that is supported by data

system

the precise part of the studied region under observation

observation

is the use of senses in collecting data it includes measurements and colecting qualiitative or quantative data

in orsder to observer data what do they do?

physicits looke ddeeeply at nature and studied it

studying the motion of the ball requaires obersving the ball and it surrounding during its?

motion

what doesnt affect the ball

its color and its sound when hitting the ground

After specifying the system the physicits starts his srtudy by suggesting a?

Simple model

to analyse a motion of a basketball

draw a basketball with no elements that effect its subsequent motion

And draw a diagram with its trajectory only

what affects the motion bal?

its trajectory and speed

after specifying the system teh physists starts his study by suggesting a simple zzzz of the system

model of the system that can be studied according to the sicentific systen

does a model have to be a vision?

no it can be a thought aswell thats what galilo did for finding out the speed of gravity

What did galilo think?

Galilo thoguth of droping two identical objects will reach teh ground at the same time irrespective of their weight beacuse the gravity works on all objects equaly

They thought that when two object are teid together the heveier one will fall faster than the lighter one

But galilo stated that both of them will fall at the same time beacuse the gravity works on all objects the same way

What thought did galilo use to draw the model of teh specified system?

The thoguht of do light and heavy object fall at the same rate?

do heavy objects fall as fast as lightter ones?

yes they do

model

a simplified look of teh studied system taht show the elements that effect the pphenomena

Teh first method?The second scientific method

Observing and asking question and collecting data

Building the hypothesis

scientists try to deduve rerlations that form a ….. of the scientific method

basis

Scientests try( teh one before)

Deduce relations that form a basis of the scientific methods

scientific hypothesis

a logical and accepting interperation of reality that was obserevded or atleats thought about

What was his goalw hen he thought about that model?

His goal was to study the mass shape and the air resistance

And make a hypothesis on how that effects on?

Speed

What did the later thoughts bellieve?

That heaver objects fall faster so if tying two objects which becomes heavier they should fall faster

galilo made a contradiction to that law and stated

tying objects will not create sudden change of velocity therefor all objects fall the same in absense of air and does not matter on what size they are

testing hypothesis analyzing data and deducing resualts

Many expirements have to be done to check the validity of the hypothesis if expirements show that the hypothesis and the expectation were not correct then they have to be amended

what did galilo use to test his hypothesis? There wenet precise machines back then to measuree the exact time fall and beacus ehe couldnt eliminate air what did he do?

He used objects of the same sizes but diffrent weights

he had to use a ramp with a ball the deeper the ramp went the faster teh ball went beacuse he wasnt able to eliminate air resistance

every hypothesis has to be tested in a?

controled experiment

what is a control experiment?

you must change on variable at a time to determine what influnces phenomenon ur observinh

its book def?

expirement involcing the manipulation of a single variable while fixing others

The fourth method?

Comunication and establishign a theory

When the hypothesis is proven correct by expirements then scientest establish

A theory that explains the phenomenom in general

how is a theory considered correct?

which ones r better hypothesises

if it could interpered the resualst of the expirement

are the ones that can predit other hypothosis and make the science world even bigger

how is a theory valid

a theory is valid as long as it can be verified by other scientists

say all the scientific method steps

observing and collecting data making a hypothesis testing the hypothesis analyzing data deducing results comunications if the hypothesis turns out right it will be making a theory and validity theory

Physics is teh study of ?

Physical world from motion and energy to light and electricity

Physisits use scientific methods

The discover general laws that can be sued to make prediction of varity of situatiations

A comon technique in physiscs for analyzing comples situattions is?

To remove irevelant factors and create a model that describes the essence of a system or situaiation