PHYSICS EXAM

Question 1

what is ptolemys model

Answer 1

the earth is in center and planets are in a line

Question 2

what is copernicus’s model

Answer 2

the sun is the center and the planets are not in a line

Question 3

what is kepler’s model

Answer 3

the sun is in the center and planets are not in a line and it has an elipitical orbit

Question 4

the center of mass of two or more objects that orbit each other is called …

Answer 4

gravitational force

Question 5

the region of space surronding a body in which another body experiences a force of gravitational attraction is called …..

Answer 5

gravitational force

Question 6

describe daltons model

Answer 6

atoms of all elements are the same

Question 7

describe thomson’s plum pudding model

Answer 7

atoms made of charged materials

Question 8

describe rutherfords model

Answer 8

nucleas positively charged

Question 9

describe bohr’s planetary model

Answer 9

energy levels

Question 10

describe shrodinger’s model

Answer 10

electron cloud model, electrons not fixed

Question 11

describe chadwicks model

Answer 11

same thing as bohrs, just with negative and positive nucleas

Question 12

what is keplers first law

Answer 12

planets move in elliptical orbits with the sun at the focus

Question 13

what is keplers second law

Answer 13

each planet moves such that an imaginary line drawn between the sun and the planet sweeps out equal areas in equal time periods

Question 14

what is keplers third law

Answer 14

the square of the orbital period of any planet is proportional to the cube of the semimajor axis of the elliptical orbit

Question 15

what is eccentricity

Answer 15

how round something is

Question 16

eccentricitu is a measure of how much a shape deciated fro a perfect….

Answer 16

circle

Question 17

the eccentiricty of an ellipse goes from value of ….. (perfect circle) to a value of ….. (a flat line)

Answer 17

0, 1

Question 18

describe keplers orbit diagram thing

Answer 18

Question 19

electric charge is a basic property of matter carried by some elementary particles that causes it to experience a ….. when placed in an electromagnetic field

Answer 19

force

Question 20

the SI unit of electric charge is …..

Answer 20

coublomb

Question 21

the number of electrons of an atom is always the same…….

Answer 21

number of protons

Question 22

the amound of charge of a proton is … but ….. than that of an electron

Answer 22

equal…. opposite

Question 23

do neutrons have a charge or no

Answer 23

no charge

Question 24

what is the net charge of an atom

Answer 24

0

Question 25

in the bohr's atomic model, each shell orbit represents ......

Answer 25

energy level

Question 26

the outer shell is known as the .......

Answer 26

vallence shell

Question 27

electric charge is conserved. this means that the total electric charge in a closed system always remains ......, meaning charge can neither be ....... nor ......., only ........ between objects

Answer 27

constant, created, destroyed, transfered

Question 28

electric charge is quantized, this means an object can only possess a charge that is a ...... of the fundamental unit of charge, which is hte charge of a single electron, which is 1.6 times 10 coulombs. you cannot have a ..... of an electron's charge, only. in other words, charge can only exist in ....... values and not in....... values

Answer 28

multiple, fraction, discrete, whole

Question 29

insulators and conductors can be charged by contact, this is known as charging by.......

Answer 29

contact

Question 30

# a a charged rod is brought near a metal sphere without touching it, and it becomes charged. this is known as charging by .......

Answer 30

induction - coming close but not touching

Question 31

polarization of insulators. polarization is not ..... a neutral object becomes polarized when a ..... object came in proximity, causing the ...... of the center of positive and negative charges within the neutral object. this redistribution means one side will have a slight ...... charge compared to the other side. polarizatio causes an ..... between charged object and neutral object. it is a ....... effect. as soon as the charged object is removed, the charged wihtin th eneutral object will ...... back to its natural state. there is no charge ......

Answer 31

charging, charged, redistribution, positive or negative, attraction, temporary, return, transfer

Question 32

energy is the .... to do ......

Answer 32

ability, work

Question 33

work is a measure of the transfer of ......

Answer 33

energy

Question 34

work done by an object is the product of the magnitude of the .... times the component of ..... parallel to the ....

Answer 34

force, displacment, force

Question 35

work and energy are both .... quatitiies

Answer 35

scalar

Question 36

work is..... if the direction of the frce is in the same direction of the displacment

Answer 36

positive

Question 37

work is ....... if the direction of the forcce is in the opposite direction from the displacement

Answer 37

negative

Question 38

no work is done when the displacement is .... when the force applied is ..... to the direction of the displacement of the body

Answer 38

zero, perpindicular

Question 39

energy is the ... to do....

Answer 39

ability, work

Question 40

work is a measure of the transfer of ......

Answer 40

energy

Question 41

kinetic energy is the energy of ....

Answer 41

motion

Question 42

if the net work is positive, the kinetic energy

Answer 42

increases

Question 43

is the net work is negative, the kinetic energy .....

Answer 43

decreases

Question 44

enery is the ... to do....

Answer 44

ability, work

Question 45

work is a measure of the transfer of.....

Answer 45

energy

Question 46

potential energy is the energy that is .... in an object due to its..... relative to some zero .....

Answer 46

stored, position, point

Question 47

gravitational potential energy is the energy .... in an object as the result of its ... position because of the ...... of the earth for the object

Answer 47

stored, vertical, gravitational force

Question 48

every spring has an .....

Answer 48

equilibrium

Question 49

this is the position in which it is neither ..... or .....

Answer 49

compressed, stretched

Question 50

were K is the spring constant and it measures how .... a spring in the units....

Answer 50

stiff, newtons/meters

Question 51

the elastic potential energy will always be ....

Answer 51

positive

Question 52

energy can neither be .... nor .... only ... from one form of energy to ....

Answer 52

created, destroyed, transferred

Question 53

power is the amount of .... transferred or converted per unit ....

Answer 53

energy, time

Question 54

the unit of power is the ..... equal to 1 .... per .....

Answer 54

watt, joule, second

Question 55

for larger units, horsepower unit is used, where 1 hp = 746 w

Question 56

power is a ....quatitity

Answer 56

scalar