energy and electrical physics

Question 1

vaporization is

Answer 1

liquid to gas

Question 2

cation is

Answer 2

positively charged atom,(like Na+)

Question 3

what is an electrolyte

Answer 3

substance dissolved in water, split into ions

Question 4

unit of electrical resistance is

Answer 4

ohm

Question 5

unit of electrical power is

Answer 5

watt

Question 6

unit for intensity is

Answer 6

amp

Question 7

unit for frequency is

Answer 7

hertz

Question 8

what is the function of a transformer?

Answer 8

change voltage of alternating current to a different voltage?(check accuracy)

Question 9

anode is…

Answer 9

positively charged electrode

Question 10

anion is …

Answer 10

negatively charged atom

Question 11

cathode is …

Answer 11

negatively charged electrode

Question 12

rubber is an…

Answer 12

insulator

Question 13

direct current is…

Answer 13

galvanic current

Question 14

potential energy is …

Answer 14

stored energy

Question 15

Kinetic energy is…

Answer 15

energy of movement

Question 16

conduction is…

Answer 16

movement of thermal energy due to contact b/w atoms

Question 17

convection is..

Answer 17

movement of thermal energy b/c of movement of fluids

Question 18

radiation is…

Answer 18

movement of thermal energy via waves of electromagnetic radiation

Question 19

direct current

Answer 19

flow of e- in one direction only

Question 20

example of DC

Answer 20

iontophoresis

Question 21

alternating current

Answer 21

oscillating flow of e- in one direction than the other

Question 22

example of alternating current

Answer 22

high frequency

Question 23

what is a conductor

Answer 23

material that e- flow through easily

Question 24

examples of conductors

Answer 24

water that contains ions, copper, gold, silver, aluminum, carbon

Question 25

what are insulators

Answer 25

materials that e- dont flow easily.

Question 26

examples of insulators

Answer 26

rubber, plastic, glass, wood, cloth

Question 27

7 heat effects

Answer 27

- increase chemical reaction rates - increase metabolic rate - increased cellular waste products - dilated blood vessels - tendons become more elastic - decreased muscle spasms - decreased joint stiffness

Question 28

6 cooling effects

Answer 28

- decreses muscle spasm - reduced pain perception - decreases swelling - slows metabolism - surface vasoconstriction - reduces bleeding

Question 29

7 mechanical effects

Answer 29

``` increased lymph flow decreased muscle fatigue decreased muscle adhesions stimulates muscle stretch reflex sedates nervous system stimulates reflexes reduced pain perception ```

Question 30

effects at the anode(+)

Answer 30

``` aka iontophoresis. vasoconstriction constricting of the skin and pores slight acidification superficial nerves are sedated increased skin absorption of positively charged products ```

Question 31

effects at cathode(-)

Answer 31

``` aka. desincrustation vasoconstriction softening of the skin and pores alkalinization increased nerve sensitivity sensory pain reduction increased absorption of negatively charged products ```

Question 32

capacitor

Answer 32

helps stabilize power supply; stores very small amount of electricity, temporarily

Question 33

rectifier

Answer 33

converts ac to dc

Question 34

converter

Answer 34

changes voltage of incoming current

Question 35

resistor

Answer 35

controls the current flow, due to RESISTANCE

Question 36

rheostat

Answer 36

type of resistor that can vary its resistance, w/o interruption

Question 37

transformer

Answer 37

transfers current b/w two circuits

Question 38

ammeter

Answer 38

measures the intensity of a current in a circuit.

Question 39

voltmeter

Answer 39

measures the potential difference b/w two points in a circuit.

Question 40

pressure is measured in

Answer 40

voltages

Question 41

intensity is measured in

Answer 41

amps

Question 42

frequenc is measured in

Answer 42

hertz

Question 43

power is measured in

Answer 43

watts

Question 44

resistance is measured in

Answer 44

ohms

Question 45

ohms law states..

Answer 45

current is proportional to voltage and inversely proportional to resistance

Question 46

intensity =

Answer 46

I=v/r