Physics Final

Front 1

without a fuse or circuit breakers the current caused by a short-circuit easily could start a fire

Back 1

true

Front 2

resistance is a property that determines how much current will flow in a circuit

Back 2

true

Front 3

if a resistor is added to a parallel circuit, the equilivant resistance will _____

Back 3

decrease

Front 4

a stretched bow and a compressed rubber ball both press elastic potential energy

Back 4

true

Front 5

a circuit which includes series and parallel brances is caleld a combined series-parallel circuit

Back 5

true

Front 6

a closed-pipe resonator is closed at both ends

Back 6

false

Front 7

where do incident rays that are parallel to principle axis converge to after reflecting off a concave mirror?

Back 7

focul point

Front 8

sound travels faster on a cold day then on a warm day

Back 8

false

Front 9

the density of electric field lines is related to the strength of the field

Back 9

false

Front 10

charge of an electron q=

Back 10

1.6 x 10^-19

Front 11

in a closed system, no objects enter of leave the system

Back 11

true

Front 12

the unit for frequency is a Hertz or cycles per second

Back 12

true

Front 13

by definition, which type of mirror has its edges curved toward the object?

Back 13

concave

Front 14

______ is decribed as the change in potential energy per unit charge in an electric field

Back 14

electric potential difference

Front 15

which material is likely to experiance a nearly elastic collision?

Back 15

hard material

Front 16

what is the difference between luminous source and illuminated source?

Back 16

luminious source- puts out light
illuminated source- reflects light

Front 17

what are the units of luminious flux and illuminance?

Back 17

luminious + lux

Front 18

red light has longer wavelength than blue light

Back 18

true

Front 19

a red ball is red because it has absorbed red light

Back 19

false

Front 20

a light-year is a unit that measures time

Back 20

false

Front 21

the _______ of sound deperts on the amplitude of the sound wave

Back 21

loudness

Front 22

several pitches played together are called?

Back 22

chord

Front 23

waves that collide with a barrier will reflect at an angle equal to the angle of incidence

Back 23

true

Front 24

specular reflection obeys the laws of reflection while diffuse reflection does not

Back 24

false

Front 25

what are the units for work and energy

Back 25

joules

Front 26

in a tug-of-war, each side pulls with a force of 500 N, but the rope does not move, how much work is done.

Back 26

0

Front 27

_______ is described as the ratio of an objects stored charge to its electrial potential difference

Back 27

capacitance

Front 28

a spring that has a non-linear relationship between force + displacement obeys Hookes Law

Back 28

false

Front 29

an inelastic collision is one in which

Back 29

kinetic energy before > kinetic energy after

Front 30

energy cannot be changed from 1 variety to another

Back 30

false

Front 31

a _______ is a long coul of wire with many loops used to create a large magnetic field

Back 31

solenoid

Front 32

if several forces are exerted on a system, calculate the work done by each force, then multiply the results

Back 32

falce

Front 33

magnetic field lines never form closed loops

Back 33

false

Front 34

machines make tasks easier by changing either the magnitude or the direction of the _____ needed

Back 34

force

Front 35

a point on a wave completes 1 cycle every 5 seconds the frequency os this wave is 1/5 seconds

Back 35

true

Front 36

force is measured in?

Back 36

newtons

Front 37

the normal with regard to reflection is perpendicular to the surface of a mirrior

Back 37

true

Front 38

electric energu is transferred from generating stations to consumers premises at extreamly low voltage

Back 38

false

Front 39

a pressure antinode in a sound wave is a region on high pressure, while a pressure node is a region on low pressure

Back 39

false

Front 40

energy is measured in?

Back 40

joules

Front 41

work is measured in?

Back 41

joules

Front 42

coulombs constant k=

Back 42

9.0 x 10^9

Front 43

more light is transmitted through transulcent material then through an apogue material

Back 43

true

Front 44

as light crosses boundaries. the frequency does not change

Back 44

true

Front 45

refraction is the bending of light around a barrier

Back 45

false

Front 46

what type of simple machine is a flight of stairs

Back 46

incline plane

Front 47

convex mirriors can produce both real and virtual images

Back 47

false

Front 48

universal law of gravitational pull g=

Back 48

6.67 x 10^-11

Front 49

write (state) IT (Tesla) in outer common units

Back 49

n/a x m or Ns/Cm

Front 50

the force length of a convex lens is always negative

Back 50

false

Front 51

Snells Law of refraction is based on the wave model of light

Back 51

false

Front 52

a convex mirror forms a virtual and upright image for all real objects regardless of that location of the object

Back 52

true

Front 53

what types of images are produced by concave lenses?

Back 53

reduced + virtual

Front 54

Hookes Law ->

Back 54

F = kx^2

Front 55

transverse waves vibrate _____ to the direction the wave propagetes

Back 55

perpendicular

Front 56

the strength of a magnetic field is measured in teslas

Back 56

true

Front 57

in a series circuit element has the same ______

Back 57

current

Front 58

if an object is placed between the focul length and the lengs of a convex lens, what image will be produced?

Back 58

enlarged + virtual

Front 59

which term describes a material that does not allow light to be transmitted?

Back 59

opaque

Front 60

sound waves will travel faster through a wooden table that through the air

Back 60

true

Front 61

which charaeristic of sound is associated with frequency?

Back 61

pitch

Front 62

speed of light c=

Back 62

3.0 x 10^8

Front 63

you have a spool of wire, a glass rod, an iron rod, and an aluminum rod. which rod should you use to make an electromagnet to pick up steel objects

Back 63

iron

Front 64

an ________ is a magnet created when current flows through a wire coil

Back 64

electromagnet

Front 65

many permanent magnets are made of an iron allow containing a mixture of aluminum, nickel, and carbon

Back 65

false

Front 66

a/an ________ is a unit equal to one joul per coulumb

Back 66

volt

Front 67

an elastic collision is one which?

Back 67

kinetic energy before > kinetic energy after

Front 68

field lines do not actually exist, they cure simple a measue of prociding a motel of an electric field

Back 68

true

Front 69

ideally, the reistance of an ammeter should be _______

Back 69

extreamly small

Front 70

the wavelength in a medium is _______ than eavelength in a vacuum

Back 70

shorter

Front 71

an electric circuit is a closed loop of pathway that allows electric charges to flow

Back 71

true